/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-Persistent-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-14 09:24:01,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-14 09:24:01,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-14 09:24:01,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-14 09:24:01,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-14 09:24:01,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-14 09:24:01,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-14 09:24:01,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-14 09:24:01,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-14 09:24:01,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-14 09:24:01,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-14 09:24:01,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-14 09:24:01,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-14 09:24:01,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-14 09:24:01,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-14 09:24:01,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-14 09:24:02,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-14 09:24:02,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-14 09:24:02,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-14 09:24:02,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-14 09:24:02,016 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-Persistent-NoLbe.epf [2021-06-14 09:24:02,060 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-14 09:24:02,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-14 09:24:02,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-14 09:24:02,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-14 09:24:02,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-14 09:24:02,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-14 09:24:02,064 INFO L138 SettingsManager]: * Use SBE=true [2021-06-14 09:24:02,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-14 09:24:02,064 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-14 09:24:02,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-14 09:24:02,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-14 09:24:02,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-14 09:24:02,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-14 09:24:02,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-14 09:24:02,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-14 09:24:02,066 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-14 09:24:02,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-14 09:24:02,066 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-14 09:24:02,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-14 09:24:02,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-14 09:24:02,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-14 09:24:02,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-14 09:24:02,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-14 09:24:02,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-14 09:24:02,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-14 09:24:02,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-14 09:24:02,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-14 09:24:02,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-14 09:24:02,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-14 09:24:02,068 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-14 09:24:02,068 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-06-14 09:24:02,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-14 09:24:02,068 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SETS [2021-06-14 09:24:02,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-14 09:24:02,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-14 09:24:02,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-14 09:24:02,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-14 09:24:02,383 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-14 09:24:02,384 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-14 09:24:02,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl [2021-06-14 09:24:02,385 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl' [2021-06-14 09:24:02,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-14 09:24:02,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-14 09:24:02,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-14 09:24:02,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-14 09:24:02,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-14 09:24:02,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 09:24:02" (1/1) ... [2021-06-14 09:24:02,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 09:24:02" (1/1) ... [2021-06-14 09:24:02,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-14 09:24:02,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-14 09:24:02,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-14 09:24:02,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-14 09:24:02,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 09:24:02" (1/1) ... [2021-06-14 09:24:02,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 09:24:02" (1/1) ... [2021-06-14 09:24:02,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 09:24:02" (1/1) ... [2021-06-14 09:24:02,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 09:24:02" (1/1) ... [2021-06-14 09:24:02,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 09:24:02" (1/1) ... [2021-06-14 09:24:02,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 09:24:02" (1/1) ... [2021-06-14 09:24:02,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 09:24:02" (1/1) ... [2021-06-14 09:24:02,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-14 09:24:02,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-14 09:24:02,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-14 09:24:02,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-14 09:24:02,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 09:24:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-14 09:24:02,510 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-06-14 09:24:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-06-14 09:24:02,510 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-06-14 09:24:02,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-14 09:24:02,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-14 09:24:02,511 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-14 09:24:02,624 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-14 09:24:02,624 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-14 09:24:02,626 INFO L202 PluginConnector]: Adding new model ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 09:24:02 BoogieIcfgContainer [2021-06-14 09:24:02,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-14 09:24:02,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-14 09:24:02,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-14 09:24:02,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-14 09:24:02,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 09:24:02" (1/2) ... [2021-06-14 09:24:02,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a4cc61 and model type ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 09:24:02, skipping insertion in model container [2021-06-14 09:24:02,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 09:24:02" (2/2) ... [2021-06-14 09:24:02,633 INFO L111 eAbstractionObserver]: Analyzing ICFG ForkInLoop02-Incrementer.bpl [2021-06-14 09:24:02,642 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-14 09:24:02,642 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-14 09:24:02,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-14 09:24:02,643 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-14 09:24:02,681 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:02,710 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:02,779 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:02,779 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:02,779 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:02,779 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:02,779 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:02,780 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:02,780 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:02,781 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of1ForFork0======== [2021-06-14 09:24:02,834 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:02,841 INFO L82 PathProgramCache]: Analyzing trace with hash 42091544, now seen corresponding path program 1 times [2021-06-14 09:24:02,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:02,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653314226] [2021-06-14 09:24:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 09:24:02,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:02,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653314226] [2021-06-14 09:24:02,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653314226] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:02,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:02,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:02,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519846945] [2021-06-14 09:24:02,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:02,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:03,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:03,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:03,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:03,012 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:03,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:03,013 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:03,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-14 09:24:03,054 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of1ForFork0 was SAFE (1/3) [2021-06-14 09:24:03,055 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:03,061 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:03,061 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:03,061 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:03,061 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:03,061 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:03,061 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:03,061 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:03,061 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:24:03,070 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (2/3) [2021-06-14 09:24:03,071 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:03,102 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:03,102 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:03,102 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:03,102 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:03,102 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:03,102 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:03,102 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:03,102 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:24:03,106 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:03,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:03,107 INFO L82 PathProgramCache]: Analyzing trace with hash 42091268, now seen corresponding path program 1 times [2021-06-14 09:24:03,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:03,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765934095] [2021-06-14 09:24:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:03,113 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:03,116 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:03,126 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:03,127 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:03,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-14 09:24:03,129 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (3/3) [2021-06-14 09:24:03,129 WARN L243 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:03,129 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-14 09:24:03,135 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:03,136 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:03,141 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:03,141 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:03,141 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:03,141 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:03,141 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:03,142 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:03,142 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:03,142 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:24:03,191 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (1/4) [2021-06-14 09:24:03,191 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:03,206 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:03,206 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:03,206 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:03,206 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:03,206 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:03,206 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:03,206 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:03,206 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:03,266 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:03,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:03,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1624858962, now seen corresponding path program 1 times [2021-06-14 09:24:03,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:03,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678202785] [2021-06-14 09:24:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:03,276 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:03,281 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:03,282 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:03,282 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:03,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-14 09:24:03,290 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (2/4) [2021-06-14 09:24:03,290 WARN L243 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:03,290 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-14 09:24:03,300 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:03,300 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:03,306 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:03,306 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:03,306 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:03,306 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:03,306 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:03,306 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:03,306 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:03,306 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of3ForFork0======== [2021-06-14 09:24:03,385 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:03,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:03,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1006356384, now seen corresponding path program 1 times [2021-06-14 09:24:03,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:03,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029909172] [2021-06-14 09:24:03,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:03,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:03,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029909172] [2021-06-14 09:24:03,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029909172] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:03,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:03,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:03,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853217661] [2021-06-14 09:24:03,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:03,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:03,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:03,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:03,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:03,426 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:03,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:03,426 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:03,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-14 09:24:03,477 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:03,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1132277107, now seen corresponding path program 1 times [2021-06-14 09:24:03,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:03,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648510076] [2021-06-14 09:24:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:03,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:03,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648510076] [2021-06-14 09:24:03,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648510076] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:03,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:03,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:03,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145483598] [2021-06-14 09:24:03,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:03,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:03,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:03,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:03,507 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:03,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:03,508 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:03,508 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:03,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-14 09:24:03,595 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:03,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:03,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1891916684, now seen corresponding path program 1 times [2021-06-14 09:24:03,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:03,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816204218] [2021-06-14 09:24:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:03,603 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:03,611 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:03,612 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:03,613 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:03,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-14 09:24:03,615 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of3ForFork0 was UNSAFE (1/5) [2021-06-14 09:24:03,616 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:03,669 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:03,669 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:03,669 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:03,669 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:03,669 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:03,669 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:03,669 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:03,669 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of3ForFork0======== Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:03,734 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:03,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1816523033, now seen corresponding path program 1 times [2021-06-14 09:24:03,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:03,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507835649] [2021-06-14 09:24:03,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:03,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:03,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507835649] [2021-06-14 09:24:03,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507835649] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:03,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:03,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:03,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296705170] [2021-06-14 09:24:03,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:03,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:03,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:03,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:03,760 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:03,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:03,760 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:03,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-14 09:24:03,779 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:03,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:03,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1816523994, now seen corresponding path program 1 times [2021-06-14 09:24:03,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:03,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129015096] [2021-06-14 09:24:03,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:03,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:03,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129015096] [2021-06-14 09:24:03,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129015096] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:03,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:03,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:03,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607667082] [2021-06-14 09:24:03,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:03,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:03,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:03,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:03,816 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:03,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:03,816 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:03,816 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:03,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-14 09:24:03,850 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:03,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:03,850 INFO L82 PathProgramCache]: Analyzing trace with hash 477669121, now seen corresponding path program 1 times [2021-06-14 09:24:03,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:03,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909269107] [2021-06-14 09:24:03,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:03,858 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:03,863 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:03,865 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:03,865 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:03,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-14 09:24:03,868 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of3ForFork0 was UNSAFE (2/5) [2021-06-14 09:24:03,868 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:03,873 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:03,873 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:03,873 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:03,873 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:03,873 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:03,873 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:03,873 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:03,873 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:24:03,961 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (3/5) [2021-06-14 09:24:03,961 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:03,977 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:03,977 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:03,977 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:03,977 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:03,977 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:03,977 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:03,977 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:03,977 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of3ForFork0======== [2021-06-14 09:24:04,033 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:04,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:04,034 INFO L82 PathProgramCache]: Analyzing trace with hash -459303287, now seen corresponding path program 1 times [2021-06-14 09:24:04,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:04,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120473788] [2021-06-14 09:24:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:04,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:04,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120473788] [2021-06-14 09:24:04,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120473788] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:04,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:04,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:04,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523122140] [2021-06-14 09:24:04,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:04,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:04,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:04,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:04,055 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:04,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:04,056 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:04,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-14 09:24:04,081 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:04,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:04,082 INFO L82 PathProgramCache]: Analyzing trace with hash 981561315, now seen corresponding path program 1 times [2021-06-14 09:24:04,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:04,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604658991] [2021-06-14 09:24:04,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:04,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:04,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604658991] [2021-06-14 09:24:04,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604658991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:04,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138629946] [2021-06-14 09:24:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:24:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:04,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:24:04,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:24:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:04,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138629946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:04,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:24:04,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:24:04,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25393676] [2021-06-14 09:24:04,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:04,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:04,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:04,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:04,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:04,249 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:04,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:04,249 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:04,250 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:04,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:04,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:04,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:24:04,545 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:04,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:04,546 INFO L82 PathProgramCache]: Analyzing trace with hash -233311345, now seen corresponding path program 1 times [2021-06-14 09:24:04,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:04,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812196260] [2021-06-14 09:24:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:04,551 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:04,557 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:04,559 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:04,559 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:04,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-14 09:24:04,561 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of3ForFork0 was UNSAFE (4/5) [2021-06-14 09:24:04,561 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:04,566 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:04,566 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:04,566 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:04,566 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:04,567 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:04,567 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:04,567 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:04,567 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:24:04,621 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:04,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:04,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1006373414, now seen corresponding path program 1 times [2021-06-14 09:24:04,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:04,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114200208] [2021-06-14 09:24:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:04,627 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:04,636 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:04,637 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:04,637 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:04,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-14 09:24:04,638 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (5/5) [2021-06-14 09:24:04,638 WARN L243 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:04,638 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-14 09:24:04,651 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:04,651 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:04,655 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:04,655 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:04,655 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:04,656 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:04,656 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:04,656 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:04,656 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:04,656 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:24:04,709 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (1/6) [2021-06-14 09:24:04,709 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:04,714 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:04,714 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:04,714 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:04,714 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:04,714 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:04,714 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:04,715 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:04,715 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:24:04,784 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:04,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:04,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1379665844, now seen corresponding path program 1 times [2021-06-14 09:24:04,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:04,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076064461] [2021-06-14 09:24:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:04,790 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:04,794 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:04,795 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:04,795 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:04,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-14 09:24:04,796 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (2/6) [2021-06-14 09:24:04,796 WARN L243 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:04,796 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-06-14 09:24:04,805 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:04,806 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:04,819 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:04,820 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:04,820 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:04,820 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:04,820 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:04,820 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:04,820 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:04,820 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of5ForFork0======== [2021-06-14 09:24:04,900 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:04,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:04,901 INFO L82 PathProgramCache]: Analyzing trace with hash -836435353, now seen corresponding path program 1 times [2021-06-14 09:24:04,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:04,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083096829] [2021-06-14 09:24:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:04,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:04,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083096829] [2021-06-14 09:24:04,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083096829] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:04,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:04,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:04,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097031874] [2021-06-14 09:24:04,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:04,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:04,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:04,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:04,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:04,917 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:04,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:04,917 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:04,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-14 09:24:04,936 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:04,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:04,936 INFO L82 PathProgramCache]: Analyzing trace with hash -159691961, now seen corresponding path program 1 times [2021-06-14 09:24:04,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:04,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549546442] [2021-06-14 09:24:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:04,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:04,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549546442] [2021-06-14 09:24:04,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549546442] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:04,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:04,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:04,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644686136] [2021-06-14 09:24:04,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:04,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:04,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:04,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:04,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:04,957 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:04,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:04,957 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:04,957 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:05,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-14 09:24:05,028 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1860877683, now seen corresponding path program 1 times [2021-06-14 09:24:05,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:05,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048890399] [2021-06-14 09:24:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:05,034 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:05,037 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:05,039 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:05,039 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:05,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-14 09:24:05,040 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of5ForFork0 was UNSAFE (1/7) [2021-06-14 09:24:05,041 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:05,050 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:05,050 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:05,051 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:05,051 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:05,051 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:05,051 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:05,051 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:05,051 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of5ForFork0======== Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:05,133 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:05,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:05,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1551730264, now seen corresponding path program 1 times [2021-06-14 09:24:05,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:05,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347501034] [2021-06-14 09:24:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:05,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:05,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347501034] [2021-06-14 09:24:05,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347501034] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:05,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:05,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:05,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739121770] [2021-06-14 09:24:05,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:05,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:05,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:05,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:05,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:05,148 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:05,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:05,148 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:05,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-14 09:24:05,204 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:05,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:05,204 INFO L82 PathProgramCache]: Analyzing trace with hash -646569277, now seen corresponding path program 1 times [2021-06-14 09:24:05,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:05,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758737110] [2021-06-14 09:24:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:05,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:05,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758737110] [2021-06-14 09:24:05,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758737110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:05,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608505515] [2021-06-14 09:24:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:24:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:05,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:24:05,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:24:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:05,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608505515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:05,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:24:05,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:24:05,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562443724] [2021-06-14 09:24:05,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:05,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:05,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:05,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:05,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:05,316 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:05,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:05,316 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:05,316 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:05,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:24:05,584 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:05,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:05,585 INFO L82 PathProgramCache]: Analyzing trace with hash -575590493, now seen corresponding path program 1 times [2021-06-14 09:24:05,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:05,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579477046] [2021-06-14 09:24:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:05,589 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:05,592 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:05,594 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:05,594 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:05,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-14 09:24:05,595 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of5ForFork0 was UNSAFE (2/7) [2021-06-14 09:24:05,596 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:05,601 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:05,601 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:05,601 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:05,601 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:05,601 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:05,602 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:05,602 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:05,602 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of5ForFork0======== [2021-06-14 09:24:05,704 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:05,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1299891497, now seen corresponding path program 1 times [2021-06-14 09:24:05,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:05,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010032717] [2021-06-14 09:24:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:05,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:05,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010032717] [2021-06-14 09:24:05,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010032717] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:05,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:05,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:05,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600829936] [2021-06-14 09:24:05,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:05,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:05,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:05,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:05,747 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:05,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:05,747 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:05,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:05,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-14 09:24:05,770 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:05,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:05,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1300815018, now seen corresponding path program 1 times [2021-06-14 09:24:05,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:05,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876712532] [2021-06-14 09:24:05,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:05,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:05,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876712532] [2021-06-14 09:24:05,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876712532] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:05,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:05,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:05,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988610485] [2021-06-14 09:24:05,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:05,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:05,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:05,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:05,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:05,810 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:05,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:05,810 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:05,810 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:05,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-14 09:24:05,838 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:05,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:05,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1300815979, now seen corresponding path program 1 times [2021-06-14 09:24:05,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:05,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202217936] [2021-06-14 09:24:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:05,855 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:05,857 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:05,858 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:05,858 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:05,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-14 09:24:05,860 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of5ForFork0 was UNSAFE (3/7) [2021-06-14 09:24:05,860 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:05,878 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:05,878 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:05,879 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:05,879 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:05,879 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:05,879 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:05,879 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:05,879 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of5ForFork0======== Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:05,984 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:05,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:05,985 INFO L82 PathProgramCache]: Analyzing trace with hash 586675309, now seen corresponding path program 1 times [2021-06-14 09:24:05,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:05,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520842450] [2021-06-14 09:24:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:06,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:06,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520842450] [2021-06-14 09:24:06,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520842450] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:06,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:06,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:06,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819767268] [2021-06-14 09:24:06,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:06,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:06,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:06,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:06,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,005 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:06,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:06,005 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:06,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-14 09:24:06,036 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:06,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:06,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1474178990, now seen corresponding path program 1 times [2021-06-14 09:24:06,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:06,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553960611] [2021-06-14 09:24:06,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:06,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:06,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553960611] [2021-06-14 09:24:06,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553960611] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:06,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:06,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:06,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153360425] [2021-06-14 09:24:06,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:06,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:06,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:06,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,068 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:06,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:06,069 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:06,069 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:06,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-14 09:24:06,101 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:06,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:06,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1475102511, now seen corresponding path program 1 times [2021-06-14 09:24:06,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:06,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029760879] [2021-06-14 09:24:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:06,106 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:06,109 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:06,110 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:06,110 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:06,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-14 09:24:06,112 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of5ForFork0 was UNSAFE (4/7) [2021-06-14 09:24:06,112 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:06,122 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:06,122 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:06,122 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:06,122 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:06,122 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:06,122 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:06,122 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:06,122 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:06,248 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (5/7) [2021-06-14 09:24:06,249 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:06,254 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:06,254 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:06,254 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:06,254 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:06,254 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:06,254 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:06,254 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:06,255 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:24:06,326 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:06,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:06,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1493509120, now seen corresponding path program 1 times [2021-06-14 09:24:06,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:06,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860459345] [2021-06-14 09:24:06,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:06,330 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:06,332 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:06,333 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:06,333 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:06,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-14 09:24:06,334 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (6/7) [2021-06-14 09:24:06,334 WARN L243 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:06,334 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-06-14 09:24:06,343 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:06,344 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:06,350 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:06,350 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:06,350 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:06,350 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:06,350 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:06,350 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:06,350 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:06,350 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of6ForFork0======== Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:06,439 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:06,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1242147672, now seen corresponding path program 1 times [2021-06-14 09:24:06,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:06,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292175201] [2021-06-14 09:24:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:24:06,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:06,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292175201] [2021-06-14 09:24:06,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292175201] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:06,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:06,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:06,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297037781] [2021-06-14 09:24:06,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:06,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:06,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:06,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,455 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:06,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:06,455 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:06,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-14 09:24:06,484 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:06,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:06,484 INFO L82 PathProgramCache]: Analyzing trace with hash 148128073, now seen corresponding path program 1 times [2021-06-14 09:24:06,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:06,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63458102] [2021-06-14 09:24:06,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:24:06,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:06,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63458102] [2021-06-14 09:24:06,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63458102] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:06,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:06,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:06,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383569406] [2021-06-14 09:24:06,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:06,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:06,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:06,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,504 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:06,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:06,504 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:06,504 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:06,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:06,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-14 09:24:06,547 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:06,547 INFO L82 PathProgramCache]: Analyzing trace with hash 617167143, now seen corresponding path program 1 times [2021-06-14 09:24:06,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:06,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931359583] [2021-06-14 09:24:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:06,551 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:06,553 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:06,554 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:06,554 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:06,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-14 09:24:06,556 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of6ForFork0 was UNSAFE (1/8) [2021-06-14 09:24:06,556 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:06,566 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:06,566 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:06,566 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:06,566 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:06,566 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:06,566 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:06,566 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:06,566 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of6ForFork0======== [2021-06-14 09:24:06,666 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:06,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1923109439, now seen corresponding path program 1 times [2021-06-14 09:24:06,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:06,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210246801] [2021-06-14 09:24:06,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:06,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:06,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210246801] [2021-06-14 09:24:06,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210246801] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:06,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:06,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:06,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042870042] [2021-06-14 09:24:06,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:06,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:06,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:06,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,694 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:06,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:06,694 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:06,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-14 09:24:06,720 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:06,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:06,720 INFO L82 PathProgramCache]: Analyzing trace with hash 513149780, now seen corresponding path program 1 times [2021-06-14 09:24:06,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:06,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501813601] [2021-06-14 09:24:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:06,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:06,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501813601] [2021-06-14 09:24:06,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501813601] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:06,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:06,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:06,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504348844] [2021-06-14 09:24:06,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:06,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:06,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:06,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,741 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:06,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:06,741 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:06,741 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:06,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-14 09:24:06,780 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:06,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:06,780 INFO L82 PathProgramCache]: Analyzing trace with hash -784290574, now seen corresponding path program 1 times [2021-06-14 09:24:06,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:06,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956862665] [2021-06-14 09:24:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:06,789 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:06,792 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:06,794 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:06,794 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:06,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-14 09:24:06,796 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of6ForFork0 was UNSAFE (2/8) [2021-06-14 09:24:06,797 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:06,811 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:06,811 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:06,812 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:06,812 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:06,812 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:06,812 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:06,812 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:06,812 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of6ForFork0======== Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:06,920 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:06,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1806959342, now seen corresponding path program 1 times [2021-06-14 09:24:06,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:06,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231547540] [2021-06-14 09:24:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:06,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:06,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231547540] [2021-06-14 09:24:06,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231547540] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:06,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:06,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:06,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001745287] [2021-06-14 09:24:06,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:06,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:06,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:06,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,935 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:06,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:06,935 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:06,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-14 09:24:06,952 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:06,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:06,953 INFO L82 PathProgramCache]: Analyzing trace with hash -181164505, now seen corresponding path program 1 times [2021-06-14 09:24:06,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:06,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714456121] [2021-06-14 09:24:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:06,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:06,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714456121] [2021-06-14 09:24:06,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714456121] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:06,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:06,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:06,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823185615] [2021-06-14 09:24:06,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:06,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:06,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:06,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:06,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:06,975 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:06,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:06,975 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:06,975 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:07,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-14 09:24:07,044 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:07,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:07,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1405418071, now seen corresponding path program 1 times [2021-06-14 09:24:07,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:07,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190109013] [2021-06-14 09:24:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:07,047 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:07,050 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:07,052 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:07,052 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:07,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-14 09:24:07,056 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of6ForFork0 was UNSAFE (3/8) [2021-06-14 09:24:07,057 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:07,074 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:07,074 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:07,075 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:07,075 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:07,075 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:07,075 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:07,075 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:07,075 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of6ForFork0======== [2021-06-14 09:24:07,160 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:07,160 INFO L82 PathProgramCache]: Analyzing trace with hash 485242799, now seen corresponding path program 1 times [2021-06-14 09:24:07,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:07,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59123157] [2021-06-14 09:24:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:07,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:07,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59123157] [2021-06-14 09:24:07,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59123157] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:07,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:07,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:07,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891527330] [2021-06-14 09:24:07,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:07,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:07,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:07,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:07,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:07,177 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:07,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:07,177 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:07,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:07,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-14 09:24:07,205 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:07,205 INFO L82 PathProgramCache]: Analyzing trace with hash -549838821, now seen corresponding path program 1 times [2021-06-14 09:24:07,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:07,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139549401] [2021-06-14 09:24:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:07,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:07,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139549401] [2021-06-14 09:24:07,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139549401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:07,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529740537] [2021-06-14 09:24:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:24:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:07,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:24:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:24:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:07,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529740537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:07,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:24:07,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:24:07,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868261840] [2021-06-14 09:24:07,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:07,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:07,292 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:07,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:07,293 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:07,293 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:07,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-14 09:24:07,552 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:07,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:07,553 INFO L82 PathProgramCache]: Analyzing trace with hash -603648953, now seen corresponding path program 1 times [2021-06-14 09:24:07,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:07,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462535139] [2021-06-14 09:24:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:07,555 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:07,557 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:07,558 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:07,558 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:07,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-14 09:24:07,559 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of6ForFork0 was UNSAFE (4/8) [2021-06-14 09:24:07,559 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:07,564 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:07,564 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:07,564 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:07,564 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:07,564 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:07,564 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:07,564 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:07,564 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:24:07,666 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (5/8) [2021-06-14 09:24:07,666 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:07,672 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:07,672 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:07,672 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:07,672 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:07,672 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:07,672 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:07,672 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:07,672 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of6ForFork0======== [2021-06-14 09:24:07,806 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:07,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:07,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1097914040, now seen corresponding path program 1 times [2021-06-14 09:24:07,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:07,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118666166] [2021-06-14 09:24:07,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:07,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:07,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118666166] [2021-06-14 09:24:07,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118666166] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:07,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:07,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:07,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699926461] [2021-06-14 09:24:07,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:07,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:07,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:07,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:07,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:07,823 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:07,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:07,823 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:07,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:07,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-14 09:24:07,844 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:07,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:07,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1098837561, now seen corresponding path program 1 times [2021-06-14 09:24:07,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:07,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400709825] [2021-06-14 09:24:07,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:07,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:07,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400709825] [2021-06-14 09:24:07,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400709825] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:07,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:07,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:07,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969337178] [2021-06-14 09:24:07,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:07,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:07,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:07,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:07,864 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:07,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:07,864 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:07,864 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:07,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:07,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:07,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-14 09:24:07,884 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:07,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:07,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1098838522, now seen corresponding path program 1 times [2021-06-14 09:24:07,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:07,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80716465] [2021-06-14 09:24:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:07,887 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:07,889 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:07,890 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:07,890 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:07,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-14 09:24:07,891 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of6ForFork0 was UNSAFE (6/8) [2021-06-14 09:24:07,891 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:07,901 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:07,902 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:07,902 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:07,902 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:07,902 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:07,902 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:07,902 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:07,902 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:07,985 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:07,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:07,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1923078110, now seen corresponding path program 1 times [2021-06-14 09:24:07,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:07,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691713238] [2021-06-14 09:24:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:07,988 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:07,991 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:07,998 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:07,998 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:07,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-14 09:24:07,999 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (7/8) [2021-06-14 09:24:07,999 WARN L243 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:08,000 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-06-14 09:24:08,011 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:08,012 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:08,020 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:08,020 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:08,020 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:08,020 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:08,020 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:08,020 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:08,020 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:08,020 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of7ForFork0======== [2021-06-14 09:24:08,122 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:08,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:08,123 INFO L82 PathProgramCache]: Analyzing trace with hash -324790659, now seen corresponding path program 1 times [2021-06-14 09:24:08,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:08,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033664251] [2021-06-14 09:24:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:08,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:08,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033664251] [2021-06-14 09:24:08,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033664251] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:08,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:08,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:08,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150591121] [2021-06-14 09:24:08,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:08,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:08,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:08,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:08,143 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:08,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:08,143 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:08,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-14 09:24:08,167 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:08,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:08,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1478575556, now seen corresponding path program 1 times [2021-06-14 09:24:08,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:08,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349399357] [2021-06-14 09:24:08,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:08,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:08,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349399357] [2021-06-14 09:24:08,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349399357] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:08,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:08,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:08,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732353264] [2021-06-14 09:24:08,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:08,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:08,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:08,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:08,190 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:08,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:08,190 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:08,190 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:08,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-14 09:24:08,226 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:08,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:08,226 INFO L82 PathProgramCache]: Analyzing trace with hash 723076946, now seen corresponding path program 1 times [2021-06-14 09:24:08,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:08,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676922521] [2021-06-14 09:24:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:08,230 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:08,232 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:08,234 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:08,235 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:08,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-14 09:24:08,237 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of7ForFork0 was UNSAFE (1/9) [2021-06-14 09:24:08,238 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:08,250 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:08,251 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:08,251 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:08,251 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:08,251 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:08,251 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:08,251 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:08,251 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:08,352 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (2/9) [2021-06-14 09:24:08,353 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:08,357 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:08,357 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:08,357 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:08,357 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:08,357 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:08,357 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:08,357 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:08,357 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of7ForFork0======== [2021-06-14 09:24:08,497 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:08,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1484731330, now seen corresponding path program 1 times [2021-06-14 09:24:08,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:08,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402533589] [2021-06-14 09:24:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:08,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:08,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402533589] [2021-06-14 09:24:08,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402533589] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:08,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:08,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:08,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460043095] [2021-06-14 09:24:08,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:08,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:08,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:08,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:08,510 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:08,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:08,510 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:08,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-14 09:24:08,527 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:08,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1217968493, now seen corresponding path program 1 times [2021-06-14 09:24:08,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:08,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233829942] [2021-06-14 09:24:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:08,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:08,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233829942] [2021-06-14 09:24:08,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233829942] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:08,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:08,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:08,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553291998] [2021-06-14 09:24:08,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:08,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:08,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:08,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:08,544 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:08,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:08,544 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:08,544 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:08,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-06-14 09:24:08,613 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:08,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:08,614 INFO L82 PathProgramCache]: Analyzing trace with hash -108466531, now seen corresponding path program 1 times [2021-06-14 09:24:08,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:08,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892770748] [2021-06-14 09:24:08,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:08,616 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:08,617 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:08,618 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:08,618 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:08,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-06-14 09:24:08,619 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of7ForFork0 was UNSAFE (3/9) [2021-06-14 09:24:08,619 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:08,634 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:08,634 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:08,634 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:08,634 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:08,634 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:08,635 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:08,635 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:08,635 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:24:08,755 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:08,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:08,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1442729874, now seen corresponding path program 1 times [2021-06-14 09:24:08,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:08,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594445958] [2021-06-14 09:24:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:08,759 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:08,760 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:08,761 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:08,761 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:08,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-06-14 09:24:08,762 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (4/9) [2021-06-14 09:24:08,762 WARN L243 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:08,762 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2021-06-14 09:24:08,776 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:08,777 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:08,781 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:08,781 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:08,781 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:08,781 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:08,781 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:08,782 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:08,782 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:08,782 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of8ForFork0======== [2021-06-14 09:24:08,936 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1741158915, now seen corresponding path program 1 times [2021-06-14 09:24:08,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:08,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227288125] [2021-06-14 09:24:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:08,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:08,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227288125] [2021-06-14 09:24:08,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227288125] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:08,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:08,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:08,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398177728] [2021-06-14 09:24:08,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:08,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:08,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:08,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:08,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:08,951 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:08,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:08,952 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:08,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:08,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-06-14 09:24:08,973 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:08,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:08,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1858648033, now seen corresponding path program 1 times [2021-06-14 09:24:08,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:08,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459230563] [2021-06-14 09:24:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:08,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:08,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459230563] [2021-06-14 09:24:08,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459230563] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:08,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:08,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:08,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6981519] [2021-06-14 09:24:08,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:08,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:08,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:08,991 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:08,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:08,991 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:08,991 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:09,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:09,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-06-14 09:24:09,023 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:09,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:09,023 INFO L82 PathProgramCache]: Analyzing trace with hash 545652365, now seen corresponding path program 1 times [2021-06-14 09:24:09,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:09,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187577402] [2021-06-14 09:24:09,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:09,026 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:09,028 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:09,028 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:09,029 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:09,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-06-14 09:24:09,029 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of8ForFork0 was UNSAFE (1/10) [2021-06-14 09:24:09,030 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:09,042 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:09,042 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:09,042 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:09,042 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:09,042 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:09,042 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:09,042 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:09,042 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of8ForFork0======== Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:09,217 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:09,218 INFO L82 PathProgramCache]: Analyzing trace with hash -279885295, now seen corresponding path program 1 times [2021-06-14 09:24:09,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:09,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506093444] [2021-06-14 09:24:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:24:09,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:09,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506093444] [2021-06-14 09:24:09,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506093444] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:09,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:09,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:09,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91522292] [2021-06-14 09:24:09,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:09,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:09,230 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:09,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:09,230 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:09,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-06-14 09:24:09,246 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:09,247 INFO L82 PathProgramCache]: Analyzing trace with hash -279884334, now seen corresponding path program 1 times [2021-06-14 09:24:09,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:09,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903984903] [2021-06-14 09:24:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:24:09,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:09,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903984903] [2021-06-14 09:24:09,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903984903] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:09,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:09,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:09,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876840004] [2021-06-14 09:24:09,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:09,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:09,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:09,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:09,263 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:09,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:09,264 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:09,264 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:09,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-06-14 09:24:09,295 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:09,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:09,296 INFO L82 PathProgramCache]: Analyzing trace with hash -86479432, now seen corresponding path program 1 times [2021-06-14 09:24:09,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:09,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920377248] [2021-06-14 09:24:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:09,299 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:09,300 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:09,301 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:09,301 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:09,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-06-14 09:24:09,302 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of8ForFork0 was UNSAFE (2/10) [2021-06-14 09:24:09,302 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:09,307 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:09,307 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:09,307 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:09,307 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:09,307 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:09,307 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:09,307 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:09,307 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of8ForFork0======== [2021-06-14 09:24:09,454 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:09,455 INFO L82 PathProgramCache]: Analyzing trace with hash 448702711, now seen corresponding path program 1 times [2021-06-14 09:24:09,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:09,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458292235] [2021-06-14 09:24:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:09,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:09,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458292235] [2021-06-14 09:24:09,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458292235] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:09,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:09,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:09,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737215117] [2021-06-14 09:24:09,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:09,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:09,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:09,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:09,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:09,467 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:09,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:09,467 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:09,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:09,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-06-14 09:24:09,485 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:09,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:09,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1024882983, now seen corresponding path program 1 times [2021-06-14 09:24:09,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:09,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783576969] [2021-06-14 09:24:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:09,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:09,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783576969] [2021-06-14 09:24:09,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783576969] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:09,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:09,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:09,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378717323] [2021-06-14 09:24:09,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:09,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:09,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:09,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:09,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:09,502 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:09,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:09,502 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:09,502 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:09,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-06-14 09:24:09,586 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:09,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:09,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1117784119, now seen corresponding path program 1 times [2021-06-14 09:24:09,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:09,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301733068] [2021-06-14 09:24:09,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:09,589 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:09,590 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:09,591 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:09,591 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:09,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-06-14 09:24:09,592 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of8ForFork0 was UNSAFE (3/10) [2021-06-14 09:24:09,592 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:09,612 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:09,612 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:09,612 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:09,612 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:09,612 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:09,612 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:09,612 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:09,612 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of8ForFork0======== Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:09,771 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:09,772 INFO L82 PathProgramCache]: Analyzing trace with hash 136807969, now seen corresponding path program 1 times [2021-06-14 09:24:09,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:09,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49020821] [2021-06-14 09:24:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:09,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:09,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49020821] [2021-06-14 09:24:09,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49020821] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:09,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:09,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:09,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232116074] [2021-06-14 09:24:09,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:09,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:09,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:09,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:09,784 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:09,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:09,784 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:09,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-06-14 09:24:09,814 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:09,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:09,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1024311650, now seen corresponding path program 1 times [2021-06-14 09:24:09,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:09,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189305961] [2021-06-14 09:24:09,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:09,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:09,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189305961] [2021-06-14 09:24:09,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189305961] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:09,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:09,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:09,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811474096] [2021-06-14 09:24:09,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:09,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:09,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:09,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:09,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:09,837 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:09,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:09,837 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:09,837 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:09,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:09,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-06-14 09:24:09,895 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:09,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1025235171, now seen corresponding path program 1 times [2021-06-14 09:24:09,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:09,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96383742] [2021-06-14 09:24:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:09,898 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:09,900 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:09,901 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:09,901 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:09,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-06-14 09:24:09,903 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of8ForFork0 was UNSAFE (4/10) [2021-06-14 09:24:09,904 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:09,908 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:09,908 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:09,909 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:09,909 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:09,909 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:09,909 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:09,909 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:09,909 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of8ForFork0======== Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:10,064 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:10,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:10,066 INFO L82 PathProgramCache]: Analyzing trace with hash -684641198, now seen corresponding path program 1 times [2021-06-14 09:24:10,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:10,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436191486] [2021-06-14 09:24:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:24:10,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:10,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436191486] [2021-06-14 09:24:10,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436191486] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:10,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:10,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:10,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537674272] [2021-06-14 09:24:10,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:10,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:10,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:10,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:10,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:10,082 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:10,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:10,082 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:10,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-06-14 09:24:10,123 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:10,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1802871635, now seen corresponding path program 1 times [2021-06-14 09:24:10,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:10,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385404065] [2021-06-14 09:24:10,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:24:10,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:10,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385404065] [2021-06-14 09:24:10,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385404065] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:10,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:10,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:10,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387978003] [2021-06-14 09:24:10,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:10,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:10,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:10,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:10,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:10,144 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:10,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:10,144 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:10,144 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:10,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:10,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-14 09:24:10,190 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:10,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:10,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1604591980, now seen corresponding path program 1 times [2021-06-14 09:24:10,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:10,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252213047] [2021-06-14 09:24:10,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:10,194 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:10,196 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:10,198 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:10,198 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:10,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-06-14 09:24:10,199 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of8ForFork0 was UNSAFE (5/10) [2021-06-14 09:24:10,199 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:10,206 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:10,206 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:10,206 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:10,207 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:10,207 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:10,207 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:10,207 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:10,207 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of8ForFork0======== Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:10,372 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:10,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:10,373 INFO L82 PathProgramCache]: Analyzing trace with hash -50217679, now seen corresponding path program 1 times [2021-06-14 09:24:10,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:10,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896689097] [2021-06-14 09:24:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:24:10,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:10,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896689097] [2021-06-14 09:24:10,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896689097] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:10,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:10,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:10,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245683249] [2021-06-14 09:24:10,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:10,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:10,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:10,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:10,386 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:10,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:10,387 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:10,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-06-14 09:24:10,418 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:10,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:10,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1857672142, now seen corresponding path program 1 times [2021-06-14 09:24:10,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:10,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171057700] [2021-06-14 09:24:10,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:24:10,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:10,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171057700] [2021-06-14 09:24:10,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171057700] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:10,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:10,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:10,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151307948] [2021-06-14 09:24:10,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:10,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:10,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:10,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:10,436 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:10,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:10,436 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:10,436 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:10,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-06-14 09:24:10,476 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:10,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:10,476 INFO L82 PathProgramCache]: Analyzing trace with hash -970168461, now seen corresponding path program 1 times [2021-06-14 09:24:10,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:10,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124654110] [2021-06-14 09:24:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:10,479 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:10,481 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:10,483 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:10,483 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:10,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-06-14 09:24:10,483 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of8ForFork0 was UNSAFE (6/10) [2021-06-14 09:24:10,484 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:10,518 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:10,518 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:10,518 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:10,518 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:10,518 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:10,518 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:10,518 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:10,518 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:24:10,662 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (7/10) [2021-06-14 09:24:10,662 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:10,671 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:10,672 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:10,672 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:10,672 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:10,672 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:10,672 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:10,672 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:10,672 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread7of8ForFork0======== [2021-06-14 09:24:10,853 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:10,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:10,853 INFO L82 PathProgramCache]: Analyzing trace with hash -60466302, now seen corresponding path program 1 times [2021-06-14 09:24:10,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:10,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171549041] [2021-06-14 09:24:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:24:10,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:10,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171549041] [2021-06-14 09:24:10,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171549041] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:10,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:10,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:10,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943956131] [2021-06-14 09:24:10,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:10,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:10,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:10,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:10,870 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:10,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:10,871 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:10,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-06-14 09:24:10,904 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:10,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:10,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1857417661, now seen corresponding path program 1 times [2021-06-14 09:24:10,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:10,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396775181] [2021-06-14 09:24:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:24:10,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:10,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396775181] [2021-06-14 09:24:10,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396775181] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:10,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:10,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:10,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753000160] [2021-06-14 09:24:10,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:10,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:10,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:10,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:10,927 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:10,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:10,927 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:10,927 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:10,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:10,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:10,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-06-14 09:24:10,974 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:10,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:10,974 INFO L82 PathProgramCache]: Analyzing trace with hash 630095172, now seen corresponding path program 1 times [2021-06-14 09:24:10,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:10,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239911611] [2021-06-14 09:24:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:10,978 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:10,980 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:10,981 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:10,981 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:10,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-06-14 09:24:10,982 INFO L301 ceAbstractionStarter]: Result for error location fooThread7of8ForFork0 was UNSAFE (8/10) [2021-06-14 09:24:10,982 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:10,994 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:10,994 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:10,994 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:10,994 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:10,994 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:10,994 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:10,994 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:10,994 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:11,135 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:11,135 INFO L82 PathProgramCache]: Analyzing trace with hash 129156400, now seen corresponding path program 1 times [2021-06-14 09:24:11,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:11,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198252891] [2021-06-14 09:24:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:11,139 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:11,140 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:11,141 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:11,142 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:11,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-06-14 09:24:11,142 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (9/10) [2021-06-14 09:24:11,142 WARN L243 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:11,142 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2021-06-14 09:24:11,154 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:11,155 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:11,164 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:11,164 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:11,164 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:11,164 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:11,164 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:11,164 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:11,164 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:11,164 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of9ForFork0======== [2021-06-14 09:24:11,343 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:11,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:11,343 INFO L82 PathProgramCache]: Analyzing trace with hash -620078543, now seen corresponding path program 1 times [2021-06-14 09:24:11,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:11,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577496921] [2021-06-14 09:24:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:11,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:11,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577496921] [2021-06-14 09:24:11,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577496921] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:11,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:11,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:11,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821434991] [2021-06-14 09:24:11,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:11,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:11,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:11,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:11,355 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:11,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:11,355 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:11,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:11,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-06-14 09:24:11,373 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:11,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:11,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2042565025, now seen corresponding path program 1 times [2021-06-14 09:24:11,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:11,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421280030] [2021-06-14 09:24:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:11,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:11,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421280030] [2021-06-14 09:24:11,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421280030] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:11,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:11,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:11,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352720738] [2021-06-14 09:24:11,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:11,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:11,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:11,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:11,392 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:11,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:11,392 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:11,392 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:11,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-06-14 09:24:11,483 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:11,483 INFO L82 PathProgramCache]: Analyzing trace with hash -222001939, now seen corresponding path program 1 times [2021-06-14 09:24:11,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:11,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000679932] [2021-06-14 09:24:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:11,486 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:11,487 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:11,488 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:11,489 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:11,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-06-14 09:24:11,489 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of9ForFork0 was UNSAFE (1/11) [2021-06-14 09:24:11,490 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:11,494 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:11,494 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:11,494 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:11,494 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:11,494 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:11,494 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:11,494 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:11,494 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of9ForFork0======== [2021-06-14 09:24:11,665 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:11,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1275446369, now seen corresponding path program 1 times [2021-06-14 09:24:11,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:11,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873306673] [2021-06-14 09:24:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:24:11,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:11,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873306673] [2021-06-14 09:24:11,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873306673] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:11,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:11,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:11,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259560532] [2021-06-14 09:24:11,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:11,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:11,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:11,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:11,682 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:11,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:11,682 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:11,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:11,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-06-14 09:24:11,711 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:11,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:11,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1275447330, now seen corresponding path program 1 times [2021-06-14 09:24:11,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:11,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905435292] [2021-06-14 09:24:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:24:11,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:11,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905435292] [2021-06-14 09:24:11,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905435292] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:11,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:11,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:11,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185713406] [2021-06-14 09:24:11,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:11,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:11,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:11,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:11,729 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:11,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:11,729 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:11,729 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:11,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-06-14 09:24:11,777 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:11,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:11,777 INFO L82 PathProgramCache]: Analyzing trace with hash 884161946, now seen corresponding path program 1 times [2021-06-14 09:24:11,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:11,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168512526] [2021-06-14 09:24:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:11,782 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:11,786 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:11,788 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:11,788 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:11,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-06-14 09:24:11,789 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of9ForFork0 was UNSAFE (2/11) [2021-06-14 09:24:11,790 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:11,803 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:11,803 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:11,803 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:11,803 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:11,803 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:11,803 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:11,803 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:11,803 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of9ForFork0======== Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:11,967 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:11,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:11,968 INFO L82 PathProgramCache]: Analyzing trace with hash -608824830, now seen corresponding path program 1 times [2021-06-14 09:24:11,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:11,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762007135] [2021-06-14 09:24:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:11,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:11,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762007135] [2021-06-14 09:24:11,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762007135] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:11,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:11,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:11,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881540886] [2021-06-14 09:24:11,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:11,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:11,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:11,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:11,980 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:11,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:11,980 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:11,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-06-14 09:24:11,994 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:11,994 INFO L82 PathProgramCache]: Analyzing trace with hash -608823869, now seen corresponding path program 1 times [2021-06-14 09:24:11,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:11,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032449073] [2021-06-14 09:24:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:12,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:12,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032449073] [2021-06-14 09:24:12,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032449073] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:12,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:12,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:12,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554322753] [2021-06-14 09:24:12,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:12,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:12,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:12,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:12,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:12,014 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:12,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:12,014 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:12,014 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:12,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:12,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-06-14 09:24:12,043 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:12,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:12,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1693670371, now seen corresponding path program 1 times [2021-06-14 09:24:12,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:12,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115720947] [2021-06-14 09:24:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:12,046 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:12,048 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:12,049 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:12,049 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:12,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-06-14 09:24:12,050 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of9ForFork0 was UNSAFE (3/11) [2021-06-14 09:24:12,050 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:12,057 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:12,057 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:12,057 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:12,057 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:12,057 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:12,057 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:12,057 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:12,057 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of9ForFork0======== [2021-06-14 09:24:12,254 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:12,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:12,255 INFO L82 PathProgramCache]: Analyzing trace with hash -250963038, now seen corresponding path program 1 times [2021-06-14 09:24:12,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:12,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416563165] [2021-06-14 09:24:12,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:12,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:12,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416563165] [2021-06-14 09:24:12,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416563165] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:12,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:12,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:12,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987617170] [2021-06-14 09:24:12,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:12,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:12,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:12,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:12,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:12,270 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:12,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:12,270 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:12,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-06-14 09:24:12,315 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:12,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:12,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1551267843, now seen corresponding path program 1 times [2021-06-14 09:24:12,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:12,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721630334] [2021-06-14 09:24:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:12,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:12,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721630334] [2021-06-14 09:24:12,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721630334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:12,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300759348] [2021-06-14 09:24:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:24:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:12,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:24:12,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:24:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:12,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300759348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:12,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:24:12,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:24:12,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015472837] [2021-06-14 09:24:12,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:12,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:12,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:12,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:12,394 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:12,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:12,394 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:12,394 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:12,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:12,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-14 09:24:12,665 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:12,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1389261485, now seen corresponding path program 1 times [2021-06-14 09:24:12,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:12,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355678780] [2021-06-14 09:24:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:12,667 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:12,668 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:12,669 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:12,669 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:12,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-06-14 09:24:12,670 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of9ForFork0 was UNSAFE (4/11) [2021-06-14 09:24:12,670 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:12,676 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:12,676 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:12,676 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:12,677 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:12,677 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:12,677 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:12,677 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:12,677 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:24:12,837 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (5/11) [2021-06-14 09:24:12,837 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:12,842 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:12,842 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:12,842 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:12,842 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:12,842 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:12,842 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:12,842 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:12,842 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:24:13,005 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2076836900, now seen corresponding path program 1 times [2021-06-14 09:24:13,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:13,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988649106] [2021-06-14 09:24:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:13,009 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:13,010 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:13,011 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:13,011 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:13,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-06-14 09:24:13,012 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (6/11) [2021-06-14 09:24:13,012 WARN L243 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:13,012 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2021-06-14 09:24:13,025 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:13,025 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:13,035 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:13,036 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:13,036 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:13,036 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:13,036 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:13,036 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:13,036 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:13,036 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of10ForFork0======== [2021-06-14 09:24:13,273 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:13,274 INFO L82 PathProgramCache]: Analyzing trace with hash -335335409, now seen corresponding path program 1 times [2021-06-14 09:24:13,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:13,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153090888] [2021-06-14 09:24:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:13,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:13,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153090888] [2021-06-14 09:24:13,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153090888] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:13,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:13,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:13,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103270162] [2021-06-14 09:24:13,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:13,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:13,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:13,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:13,288 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:13,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:13,288 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:13,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:13,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-06-14 09:24:13,315 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:13,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1805462656, now seen corresponding path program 1 times [2021-06-14 09:24:13,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:13,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507282153] [2021-06-14 09:24:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:13,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:13,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507282153] [2021-06-14 09:24:13,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507282153] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:13,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:13,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:13,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228667164] [2021-06-14 09:24:13,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:13,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:13,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:13,332 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:13,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:13,332 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:13,332 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:13,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:13,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:13,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-06-14 09:24:13,371 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:13,371 INFO L82 PathProgramCache]: Analyzing trace with hash 117191130, now seen corresponding path program 1 times [2021-06-14 09:24:13,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:13,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253430075] [2021-06-14 09:24:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:13,374 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:13,375 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:13,376 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:13,376 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:13,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-06-14 09:24:13,378 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of10ForFork0 was UNSAFE (1/12) [2021-06-14 09:24:13,378 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:13,388 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:13,388 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:13,388 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:13,388 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:13,388 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:13,388 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:13,388 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:13,388 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of10ForFork0======== Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:13,590 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:13,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:13,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1622739239, now seen corresponding path program 1 times [2021-06-14 09:24:13,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:13,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796619659] [2021-06-14 09:24:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:24:13,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:13,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796619659] [2021-06-14 09:24:13,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796619659] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:13,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:13,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:13,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032781] [2021-06-14 09:24:13,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:13,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:13,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:13,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:13,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:13,613 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:13,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:13,613 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:13,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-06-14 09:24:13,637 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:13,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1234691702, now seen corresponding path program 1 times [2021-06-14 09:24:13,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:13,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88598907] [2021-06-14 09:24:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:24:13,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:13,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88598907] [2021-06-14 09:24:13,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88598907] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:13,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:13,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:13,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182969492] [2021-06-14 09:24:13,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:13,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:13,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:13,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:13,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:13,654 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:13,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:13,654 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:13,654 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:13,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:13,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-06-14 09:24:13,688 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:13,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1127771984, now seen corresponding path program 1 times [2021-06-14 09:24:13,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:13,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651638575] [2021-06-14 09:24:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:13,691 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:13,693 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:13,693 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:13,694 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:13,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-06-14 09:24:13,695 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of10ForFork0 was UNSAFE (2/12) [2021-06-14 09:24:13,695 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:13,699 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:13,700 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:13,700 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:13,700 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:13,700 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:13,700 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:13,700 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:13,700 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of10ForFork0======== [2021-06-14 09:24:13,914 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:13,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:13,914 INFO L82 PathProgramCache]: Analyzing trace with hash 457099848, now seen corresponding path program 1 times [2021-06-14 09:24:13,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:13,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346158496] [2021-06-14 09:24:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:24:13,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:13,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346158496] [2021-06-14 09:24:13,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346158496] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:13,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:13,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:13,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407102010] [2021-06-14 09:24:13,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:13,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:13,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:13,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:13,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:13,927 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:13,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:13,927 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:13,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:13,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-06-14 09:24:13,953 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:13,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:13,953 INFO L82 PathProgramCache]: Analyzing trace with hash 458023369, now seen corresponding path program 1 times [2021-06-14 09:24:13,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:13,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742120939] [2021-06-14 09:24:13,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:24:13,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:13,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742120939] [2021-06-14 09:24:13,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742120939] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:13,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:13,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:13,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534573903] [2021-06-14 09:24:13,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:13,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:13,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:13,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:13,975 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:13,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:13,975 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:13,975 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:14,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:14,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:14,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-06-14 09:24:14,035 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:14,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:14,036 INFO L82 PathProgramCache]: Analyzing trace with hash 458024330, now seen corresponding path program 1 times [2021-06-14 09:24:14,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:14,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543975266] [2021-06-14 09:24:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:14,039 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:14,041 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:14,042 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:14,042 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:14,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-06-14 09:24:14,043 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of10ForFork0 was UNSAFE (3/12) [2021-06-14 09:24:14,043 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:14,047 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:14,047 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:14,047 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:14,047 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:14,047 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:14,047 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:14,047 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:14,047 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of10ForFork0======== [2021-06-14 09:24:14,255 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:14,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:14,255 INFO L82 PathProgramCache]: Analyzing trace with hash -864301980, now seen corresponding path program 1 times [2021-06-14 09:24:14,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:14,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824689389] [2021-06-14 09:24:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:14,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:14,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824689389] [2021-06-14 09:24:14,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824689389] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:14,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:14,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:14,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838634914] [2021-06-14 09:24:14,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:14,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:14,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:14,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:14,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:14,273 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:14,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:14,273 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:14,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:14,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-06-14 09:24:14,296 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:14,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1023557037, now seen corresponding path program 1 times [2021-06-14 09:24:14,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:14,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932403824] [2021-06-14 09:24:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:14,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:14,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932403824] [2021-06-14 09:24:14,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932403824] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:14,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:14,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:14,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717356188] [2021-06-14 09:24:14,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:14,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:14,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:14,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:14,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:14,315 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:14,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:14,315 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:14,315 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:14,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:14,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-06-14 09:24:14,348 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:14,348 INFO L82 PathProgramCache]: Analyzing trace with hash -90781459, now seen corresponding path program 1 times [2021-06-14 09:24:14,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:14,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393187625] [2021-06-14 09:24:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:14,351 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:14,352 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:14,353 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:14,354 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:14,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-06-14 09:24:14,355 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of10ForFork0 was UNSAFE (4/12) [2021-06-14 09:24:14,355 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:14,366 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:14,366 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:14,366 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:14,366 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:14,366 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:14,366 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:14,366 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:14,366 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread7of10ForFork0======== Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:14,601 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:14,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:14,602 INFO L82 PathProgramCache]: Analyzing trace with hash -2011684030, now seen corresponding path program 1 times [2021-06-14 09:24:14,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:14,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007273966] [2021-06-14 09:24:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:24:14,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:14,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007273966] [2021-06-14 09:24:14,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007273966] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:14,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:14,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:14,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017809477] [2021-06-14 09:24:14,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:14,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:14,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:14,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:14,616 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:14,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:14,616 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:14,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-06-14 09:24:14,650 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:14,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:14,650 INFO L82 PathProgramCache]: Analyzing trace with hash 475828803, now seen corresponding path program 1 times [2021-06-14 09:24:14,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:14,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409235005] [2021-06-14 09:24:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:24:14,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:14,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409235005] [2021-06-14 09:24:14,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409235005] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:14,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:14,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:14,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239991309] [2021-06-14 09:24:14,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:14,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:14,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:14,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:14,671 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:14,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:14,671 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:14,671 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:14,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:14,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:14,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-06-14 09:24:14,714 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:14,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:14,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1363332484, now seen corresponding path program 1 times [2021-06-14 09:24:14,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:14,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822108071] [2021-06-14 09:24:14,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:14,717 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:14,719 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:14,720 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:14,721 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:14,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-06-14 09:24:14,722 INFO L301 ceAbstractionStarter]: Result for error location fooThread7of10ForFork0 was UNSAFE (5/12) [2021-06-14 09:24:14,722 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:14,828 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:14,828 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:14,828 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:14,828 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:14,828 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:14,828 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:14,829 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:14,829 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:24:15,036 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (6/12) [2021-06-14 09:24:15,036 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:15,040 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:15,040 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:15,040 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:15,040 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:15,040 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:15,040 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:15,041 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:15,041 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of10ForFork0======== [2021-06-14 09:24:15,272 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:15,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1347083715, now seen corresponding path program 1 times [2021-06-14 09:24:15,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:15,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394535080] [2021-06-14 09:24:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:15,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:15,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394535080] [2021-06-14 09:24:15,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394535080] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:15,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:15,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:15,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528682962] [2021-06-14 09:24:15,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:15,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:15,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:15,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:15,288 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:15,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:15,288 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:15,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-06-14 09:24:15,339 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:15,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:15,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1881687111, now seen corresponding path program 1 times [2021-06-14 09:24:15,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:15,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650518351] [2021-06-14 09:24:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:15,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:15,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650518351] [2021-06-14 09:24:15,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650518351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:15,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794266435] [2021-06-14 09:24:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:24:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:15,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:24:15,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:24:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:15,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794266435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:15,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:24:15,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:24:15,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105666903] [2021-06-14 09:24:15,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:15,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:15,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:15,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:15,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:15,433 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:15,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:15,433 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:15,434 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:15,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-14 09:24:15,725 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:15,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:15,725 INFO L82 PathProgramCache]: Analyzing trace with hash 328371326, now seen corresponding path program 1 times [2021-06-14 09:24:15,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:15,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591058438] [2021-06-14 09:24:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:15,728 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:15,729 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:15,730 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:15,730 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:15,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-06-14 09:24:15,731 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of10ForFork0 was UNSAFE (7/12) [2021-06-14 09:24:15,731 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:15,738 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:15,738 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:15,738 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:15,738 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:15,738 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:15,738 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:15,738 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:15,738 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread9of10ForFork0======== Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:15,976 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:15,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:15,976 INFO L82 PathProgramCache]: Analyzing trace with hash 610936439, now seen corresponding path program 1 times [2021-06-14 09:24:15,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:15,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805832027] [2021-06-14 09:24:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:24:16,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:16,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805832027] [2021-06-14 09:24:16,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805832027] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:16,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:16,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:16,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919420381] [2021-06-14 09:24:16,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:16,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:16,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:16,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:16,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:16,001 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:16,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:16,001 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:16,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-06-14 09:24:16,051 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:16,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:16,051 INFO L82 PathProgramCache]: Analyzing trace with hash 317533432, now seen corresponding path program 1 times [2021-06-14 09:24:16,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:16,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051864733] [2021-06-14 09:24:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:24:16,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:16,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051864733] [2021-06-14 09:24:16,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051864733] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:16,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:16,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:16,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401141477] [2021-06-14 09:24:16,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:16,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:16,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:16,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:16,079 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:16,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:16,079 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:16,079 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:16,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-06-14 09:24:16,139 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:16,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:16,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1479417927, now seen corresponding path program 1 times [2021-06-14 09:24:16,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:16,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319223724] [2021-06-14 09:24:16,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:16,143 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:16,146 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:16,147 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:16,147 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:16,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-06-14 09:24:16,148 INFO L301 ceAbstractionStarter]: Result for error location fooThread9of10ForFork0 was UNSAFE (8/12) [2021-06-14 09:24:16,148 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:16,152 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:16,153 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:16,153 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:16,153 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:16,153 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:16,153 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:16,153 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:16,153 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:24:16,345 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:16,346 INFO L82 PathProgramCache]: Analyzing trace with hash 933455478, now seen corresponding path program 1 times [2021-06-14 09:24:16,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:16,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807820482] [2021-06-14 09:24:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:16,351 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:16,353 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:16,354 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:16,354 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:16,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-06-14 09:24:16,355 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (9/12) [2021-06-14 09:24:16,355 WARN L243 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:16,355 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2021-06-14 09:24:16,371 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:16,372 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:16,376 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:16,377 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:16,377 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:16,377 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:16,377 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:16,377 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:16,377 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:16,377 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread11of11ForFork0======== [2021-06-14 09:24:16,631 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:16,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1119189071, now seen corresponding path program 1 times [2021-06-14 09:24:16,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:16,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078698959] [2021-06-14 09:24:16,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:24:16,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:16,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078698959] [2021-06-14 09:24:16,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078698959] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:16,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:16,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:16,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955691919] [2021-06-14 09:24:16,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:16,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:16,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:16,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:16,648 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:16,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:16,648 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:16,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:16,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-06-14 09:24:16,685 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:16,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1119188110, now seen corresponding path program 1 times [2021-06-14 09:24:16,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:16,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395547990] [2021-06-14 09:24:16,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:24:16,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:16,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395547990] [2021-06-14 09:24:16,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395547990] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:16,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:16,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:16,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198153774] [2021-06-14 09:24:16,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:16,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:16,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:16,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:16,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:16,706 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:16,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:16,708 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:16,708 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:16,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-06-14 09:24:16,771 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:16,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:16,771 INFO L82 PathProgramCache]: Analyzing trace with hash -335092547, now seen corresponding path program 1 times [2021-06-14 09:24:16,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:16,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462725069] [2021-06-14 09:24:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:16,775 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:16,777 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:16,778 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:16,779 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:16,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-06-14 09:24:16,779 INFO L301 ceAbstractionStarter]: Result for error location fooThread11of11ForFork0 was UNSAFE (1/13) [2021-06-14 09:24:16,780 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:16,785 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:16,785 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:16,785 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:16,785 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:16,785 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:16,785 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:16,785 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:16,785 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread10of11ForFork0======== [2021-06-14 09:24:17,041 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:17,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:17,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2048577613, now seen corresponding path program 1 times [2021-06-14 09:24:17,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:17,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778491278] [2021-06-14 09:24:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:24:17,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:17,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778491278] [2021-06-14 09:24:17,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778491278] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:17,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:17,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:17,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194861368] [2021-06-14 09:24:17,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:17,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:17,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:17,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:17,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:17,054 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:17,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:17,054 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:17,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:17,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-06-14 09:24:17,097 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:17,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1161073932, now seen corresponding path program 1 times [2021-06-14 09:24:17,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:17,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405256077] [2021-06-14 09:24:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:24:17,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:17,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405256077] [2021-06-14 09:24:17,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405256077] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:17,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:17,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:17,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994619437] [2021-06-14 09:24:17,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:17,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:17,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:17,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:17,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:17,117 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:17,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:17,117 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:17,117 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:17,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-06-14 09:24:17,169 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:17,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:17,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1160150411, now seen corresponding path program 1 times [2021-06-14 09:24:17,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:17,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423731625] [2021-06-14 09:24:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:17,172 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:17,175 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:17,177 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:17,177 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:17,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-06-14 09:24:17,178 INFO L301 ceAbstractionStarter]: Result for error location fooThread10of11ForFork0 was UNSAFE (2/13) [2021-06-14 09:24:17,178 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:17,184 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:17,184 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:17,184 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:17,184 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:17,184 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:17,184 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:17,184 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:17,184 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread9of11ForFork0======== [2021-06-14 09:24:17,463 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:17,464 INFO L82 PathProgramCache]: Analyzing trace with hash -458928074, now seen corresponding path program 1 times [2021-06-14 09:24:17,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:17,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696396892] [2021-06-14 09:24:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:24:17,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:17,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696396892] [2021-06-14 09:24:17,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696396892] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:17,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:17,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:17,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028075645] [2021-06-14 09:24:17,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:17,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:17,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:17,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:17,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:17,481 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:17,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:17,481 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:17,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:17,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-06-14 09:24:17,526 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:17,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:17,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2039087863, now seen corresponding path program 1 times [2021-06-14 09:24:17,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:17,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011446651] [2021-06-14 09:24:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:24:17,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:17,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011446651] [2021-06-14 09:24:17,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011446651] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:17,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:17,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:17,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189661622] [2021-06-14 09:24:17,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:17,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:17,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:17,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:17,544 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:17,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:17,544 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:17,545 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:17,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:17,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-06-14 09:24:17,601 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:17,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:17,601 INFO L82 PathProgramCache]: Analyzing trace with hash 231633400, now seen corresponding path program 1 times [2021-06-14 09:24:17,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:17,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216839392] [2021-06-14 09:24:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:17,606 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:17,609 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:17,610 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:17,610 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:17,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-06-14 09:24:17,611 INFO L301 ceAbstractionStarter]: Result for error location fooThread9of11ForFork0 was UNSAFE (3/13) [2021-06-14 09:24:17,611 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:17,621 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:17,621 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:17,621 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:17,621 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:17,621 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:17,621 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:17,621 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:17,621 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:17,856 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (4/13) [2021-06-14 09:24:17,856 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:17,865 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:17,865 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:17,865 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:17,865 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:17,865 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:17,865 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:17,865 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:17,865 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of11ForFork0======== [2021-06-14 09:24:18,071 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:18,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:18,071 INFO L82 PathProgramCache]: Analyzing trace with hash 12721324, now seen corresponding path program 1 times [2021-06-14 09:24:18,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:18,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577205713] [2021-06-14 09:24:18,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:18,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:18,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577205713] [2021-06-14 09:24:18,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577205713] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:18,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:18,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:18,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443992713] [2021-06-14 09:24:18,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:18,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:18,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:18,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:18,083 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:18,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:18,083 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:18,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:18,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-06-14 09:24:18,100 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:18,101 INFO L82 PathProgramCache]: Analyzing trace with hash 394361659, now seen corresponding path program 1 times [2021-06-14 09:24:18,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:18,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010958407] [2021-06-14 09:24:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:18,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:18,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010958407] [2021-06-14 09:24:18,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010958407] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:18,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:18,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:18,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428336656] [2021-06-14 09:24:18,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:18,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:18,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:18,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:18,119 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:18,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:18,119 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:18,119 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:18,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-06-14 09:24:18,147 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:18,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:18,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1024454225, now seen corresponding path program 1 times [2021-06-14 09:24:18,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:18,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144612816] [2021-06-14 09:24:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:18,150 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:18,151 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:18,152 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:18,152 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:18,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-06-14 09:24:18,153 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of11ForFork0 was UNSAFE (5/13) [2021-06-14 09:24:18,153 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:18,162 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:18,162 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:18,162 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:18,162 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:18,162 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:18,163 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:18,163 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:18,163 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of11ForFork0======== Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:18,425 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:18,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:18,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1439070260, now seen corresponding path program 1 times [2021-06-14 09:24:18,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:18,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949763531] [2021-06-14 09:24:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:18,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:18,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949763531] [2021-06-14 09:24:18,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949763531] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:18,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:18,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:18,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791941255] [2021-06-14 09:24:18,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:18,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:18,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:18,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:18,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:18,436 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:18,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:18,436 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:18,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:18,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-06-14 09:24:18,454 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:18,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1661505847, now seen corresponding path program 1 times [2021-06-14 09:24:18,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:18,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684688425] [2021-06-14 09:24:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:18,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:18,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684688425] [2021-06-14 09:24:18,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684688425] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:18,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:18,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:18,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996699206] [2021-06-14 09:24:18,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:18,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:18,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:18,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:18,472 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:18,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:18,472 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:18,472 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:18,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-06-14 09:24:18,592 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:18,592 INFO L82 PathProgramCache]: Analyzing trace with hash -36452536, now seen corresponding path program 1 times [2021-06-14 09:24:18,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:18,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504225807] [2021-06-14 09:24:18,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:18,595 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:18,596 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:18,597 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:18,597 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:18,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-06-14 09:24:18,598 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of11ForFork0 was UNSAFE (6/13) [2021-06-14 09:24:18,598 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:18,610 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:18,610 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:18,610 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:18,610 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:18,610 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:18,611 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:18,611 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:18,611 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of11ForFork0======== Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:18,840 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:18,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1806058151, now seen corresponding path program 1 times [2021-06-14 09:24:18,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:18,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164625352] [2021-06-14 09:24:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:24:18,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:18,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164625352] [2021-06-14 09:24:18,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164625352] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:18,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:18,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:18,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976100758] [2021-06-14 09:24:18,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:18,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:18,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:18,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:18,853 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:18,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:18,854 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:18,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-06-14 09:24:18,876 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:18,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:18,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1806981672, now seen corresponding path program 1 times [2021-06-14 09:24:18,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:18,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997730802] [2021-06-14 09:24:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:24:18,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:18,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997730802] [2021-06-14 09:24:18,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997730802] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:18,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:18,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:18,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371408460] [2021-06-14 09:24:18,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:18,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:18,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:18,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:18,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:18,892 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:18,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:18,893 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:18,893 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:18,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-06-14 09:24:18,918 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:18,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:18,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1806982633, now seen corresponding path program 1 times [2021-06-14 09:24:18,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:18,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516893059] [2021-06-14 09:24:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:18,921 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:18,922 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:18,923 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:18,924 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:18,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-06-14 09:24:18,925 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of11ForFork0 was UNSAFE (7/13) [2021-06-14 09:24:18,925 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:18,936 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:18,936 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:18,936 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:18,936 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:18,936 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:18,936 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:18,936 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:18,936 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of11ForFork0======== [2021-06-14 09:24:19,141 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:19,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:19,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2142231037, now seen corresponding path program 1 times [2021-06-14 09:24:19,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:19,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911645007] [2021-06-14 09:24:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:19,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:19,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911645007] [2021-06-14 09:24:19,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911645007] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:19,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:19,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:19,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632531178] [2021-06-14 09:24:19,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:19,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:19,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:19,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:19,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:19,150 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:19,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:19,150 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:19,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-06-14 09:24:19,205 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:19,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:19,206 INFO L82 PathProgramCache]: Analyzing trace with hash 967751899, now seen corresponding path program 1 times [2021-06-14 09:24:19,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:19,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7458219] [2021-06-14 09:24:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:19,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:19,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7458219] [2021-06-14 09:24:19,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7458219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:19,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433731778] [2021-06-14 09:24:19,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:24:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:19,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:24:19,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:24:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:19,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433731778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:19,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:24:19,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:24:19,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567483278] [2021-06-14 09:24:19,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:19,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:19,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:19,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:19,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:19,309 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:19,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:19,309 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:19,309 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:19,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:19,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:24:19,597 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:19,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:19,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1468199330, now seen corresponding path program 1 times [2021-06-14 09:24:19,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:19,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523687695] [2021-06-14 09:24:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:19,600 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:19,600 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:19,601 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:19,602 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:19,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-06-14 09:24:19,603 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of11ForFork0 was UNSAFE (8/13) [2021-06-14 09:24:19,603 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:19,614 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:19,614 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:19,614 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:19,615 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:19,615 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:19,615 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:19,615 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:19,615 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of11ForFork0======== Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:19,858 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:19,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:19,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1746935267, now seen corresponding path program 1 times [2021-06-14 09:24:19,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:19,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059551540] [2021-06-14 09:24:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:19,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:19,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059551540] [2021-06-14 09:24:19,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059551540] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:19,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:19,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:19,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994733452] [2021-06-14 09:24:19,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:19,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:19,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:19,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:19,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:19,870 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:19,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:19,870 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:19,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:19,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-06-14 09:24:19,904 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:19,904 INFO L82 PathProgramCache]: Analyzing trace with hash -60519196, now seen corresponding path program 1 times [2021-06-14 09:24:19,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:19,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097523803] [2021-06-14 09:24:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:19,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:19,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097523803] [2021-06-14 09:24:19,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097523803] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:19,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:19,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:19,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272065603] [2021-06-14 09:24:19,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:19,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:19,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:19,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:19,920 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:19,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:19,920 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:19,920 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:20,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-06-14 09:24:20,012 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:20,013 INFO L82 PathProgramCache]: Analyzing trace with hash 826984485, now seen corresponding path program 1 times [2021-06-14 09:24:20,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:20,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066122618] [2021-06-14 09:24:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:20,015 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:20,017 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:20,018 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:20,018 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:20,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-06-14 09:24:20,018 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of11ForFork0 was UNSAFE (9/13) [2021-06-14 09:24:20,019 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:20,023 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:20,023 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:20,023 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:20,023 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:20,024 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:20,024 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:20,024 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:20,024 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread7of11ForFork0======== [2021-06-14 09:24:20,245 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:20,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:20,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1185637061, now seen corresponding path program 1 times [2021-06-14 09:24:20,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:20,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130729936] [2021-06-14 09:24:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:24:20,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:20,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130729936] [2021-06-14 09:24:20,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130729936] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:20,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:20,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:20,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205777664] [2021-06-14 09:24:20,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:20,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:20,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:20,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:20,258 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:20,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:20,258 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:20,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-06-14 09:24:20,295 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:20,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:20,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1312378876, now seen corresponding path program 1 times [2021-06-14 09:24:20,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:20,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181053532] [2021-06-14 09:24:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:24:20,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:20,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181053532] [2021-06-14 09:24:20,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181053532] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:20,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:20,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:20,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175342262] [2021-06-14 09:24:20,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:20,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:20,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:20,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:20,312 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:20,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:20,312 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:20,312 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:20,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:20,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:20,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-06-14 09:24:20,357 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:20,357 INFO L82 PathProgramCache]: Analyzing trace with hash -495075587, now seen corresponding path program 1 times [2021-06-14 09:24:20,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:20,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44144463] [2021-06-14 09:24:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:20,360 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:20,363 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:20,364 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:20,365 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:20,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-06-14 09:24:20,365 INFO L301 ceAbstractionStarter]: Result for error location fooThread7of11ForFork0 was UNSAFE (10/13) [2021-06-14 09:24:20,365 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:20,374 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:20,374 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:20,374 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:20,374 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:20,374 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:20,374 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:20,374 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:20,374 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:20,580 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:20,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1317107678, now seen corresponding path program 1 times [2021-06-14 09:24:20,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:20,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196681760] [2021-06-14 09:24:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:20,583 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:20,585 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:20,586 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:20,587 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:20,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-06-14 09:24:20,587 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (11/13) [2021-06-14 09:24:20,587 WARN L243 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:20,587 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2021-06-14 09:24:20,605 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:20,606 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:20,611 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:20,611 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:20,611 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:20,611 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:20,611 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:20,611 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:20,611 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:20,611 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread10of12ForFork0======== [2021-06-14 09:24:20,813 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:20,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:20,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1774039815, now seen corresponding path program 1 times [2021-06-14 09:24:20,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:20,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423321435] [2021-06-14 09:24:20,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:24:20,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:20,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423321435] [2021-06-14 09:24:20,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423321435] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:20,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:20,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:20,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552616024] [2021-06-14 09:24:20,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:20,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:20,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:20,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:20,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:20,830 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:20,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:20,830 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:20,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-06-14 09:24:20,871 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:20,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:20,871 INFO L82 PathProgramCache]: Analyzing trace with hash 839341139, now seen corresponding path program 1 times [2021-06-14 09:24:20,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:20,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502601478] [2021-06-14 09:24:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:24:20,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:20,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502601478] [2021-06-14 09:24:20,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502601478] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:20,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:20,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:20,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053786970] [2021-06-14 09:24:20,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:20,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:20,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:20,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:20,890 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:20,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:20,890 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:20,890 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:20,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-06-14 09:24:20,951 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:20,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:20,951 INFO L82 PathProgramCache]: Analyzing trace with hash -846997231, now seen corresponding path program 1 times [2021-06-14 09:24:20,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:20,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727262137] [2021-06-14 09:24:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:20,955 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:20,956 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:20,958 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:20,958 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:20,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-06-14 09:24:20,959 INFO L301 ceAbstractionStarter]: Result for error location fooThread10of12ForFork0 was UNSAFE (1/14) [2021-06-14 09:24:20,959 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:20,970 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:20,970 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:20,970 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:20,970 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:20,970 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:20,970 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:20,970 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:20,970 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread9of12ForFork0======== Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:21,302 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:21,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1968534376, now seen corresponding path program 1 times [2021-06-14 09:24:21,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:21,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168780548] [2021-06-14 09:24:21,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:24:21,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:21,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168780548] [2021-06-14 09:24:21,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168780548] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:21,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:21,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:21,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704350305] [2021-06-14 09:24:21,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:21,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:21,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:21,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:21,314 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:21,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:21,315 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:21,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:21,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-06-14 09:24:21,352 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:21,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1967610855, now seen corresponding path program 1 times [2021-06-14 09:24:21,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:21,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834177888] [2021-06-14 09:24:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:24:21,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:21,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834177888] [2021-06-14 09:24:21,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834177888] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:21,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:21,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:21,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174924229] [2021-06-14 09:24:21,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:21,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:21,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:21,368 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:21,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:21,368 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:21,368 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:21,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-06-14 09:24:21,412 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:21,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:21,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1967609894, now seen corresponding path program 1 times [2021-06-14 09:24:21,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:21,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217361322] [2021-06-14 09:24:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:21,415 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:21,422 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:21,423 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:21,423 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:21,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-06-14 09:24:21,424 INFO L301 ceAbstractionStarter]: Result for error location fooThread9of12ForFork0 was UNSAFE (2/14) [2021-06-14 09:24:21,424 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:21,431 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:21,431 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:21,431 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:21,431 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:21,431 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:21,431 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:21,431 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:21,431 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:21,698 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (3/14) [2021-06-14 09:24:21,698 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:21,706 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:21,706 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:21,706 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:21,706 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:21,706 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:21,706 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:21,707 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:21,707 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of12ForFork0======== Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:21,986 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:21,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1085199305, now seen corresponding path program 1 times [2021-06-14 09:24:21,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:21,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930737467] [2021-06-14 09:24:21,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:24:21,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:21,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930737467] [2021-06-14 09:24:21,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930737467] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:21,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:21,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:21,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698289840] [2021-06-14 09:24:21,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:21,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:21,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:21,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:21,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:21,999 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:21,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:21,999 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:22,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-06-14 09:24:22,028 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:22,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:22,028 INFO L82 PathProgramCache]: Analyzing trace with hash -197695624, now seen corresponding path program 1 times [2021-06-14 09:24:22,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:22,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419988213] [2021-06-14 09:24:22,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:24:22,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:22,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419988213] [2021-06-14 09:24:22,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419988213] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:22,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:22,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:22,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334114428] [2021-06-14 09:24:22,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:22,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:22,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:22,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:22,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:22,050 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:22,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:22,050 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:22,050 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:22,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-06-14 09:24:22,094 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:22,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:22,094 INFO L82 PathProgramCache]: Analyzing trace with hash -196772103, now seen corresponding path program 1 times [2021-06-14 09:24:22,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:22,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068688902] [2021-06-14 09:24:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:22,097 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:22,098 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:22,100 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:22,100 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:22,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-06-14 09:24:22,100 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of12ForFork0 was UNSAFE (4/14) [2021-06-14 09:24:22,100 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:22,109 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:22,109 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:22,109 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:22,109 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:22,109 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:22,109 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:22,109 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:22,109 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of12ForFork0======== [2021-06-14 09:24:22,348 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:22,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:22,349 INFO L82 PathProgramCache]: Analyzing trace with hash -569870850, now seen corresponding path program 1 times [2021-06-14 09:24:22,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:22,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273836511] [2021-06-14 09:24:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:22,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:22,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273836511] [2021-06-14 09:24:22,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273836511] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:22,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:22,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:22,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481838568] [2021-06-14 09:24:22,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:22,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:22,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:22,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:22,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:22,366 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:22,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:22,366 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:22,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-06-14 09:24:22,382 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:22,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:22,382 INFO L82 PathProgramCache]: Analyzing trace with hash -569869889, now seen corresponding path program 1 times [2021-06-14 09:24:22,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:22,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565909135] [2021-06-14 09:24:22,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:22,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:22,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565909135] [2021-06-14 09:24:22,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565909135] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:22,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:22,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:22,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145153189] [2021-06-14 09:24:22,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:22,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:22,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:22,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:22,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:22,395 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:22,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:22,395 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:22,395 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:22,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-06-14 09:24:22,484 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:22,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:22,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1210815101, now seen corresponding path program 1 times [2021-06-14 09:24:22,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:22,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322756642] [2021-06-14 09:24:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:22,486 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:22,487 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:22,488 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:22,488 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:22,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-06-14 09:24:22,489 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of12ForFork0 was UNSAFE (5/14) [2021-06-14 09:24:22,489 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:22,492 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:22,492 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:22,492 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:22,492 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:22,492 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:22,492 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:22,492 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:22,492 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of12ForFork0======== [2021-06-14 09:24:22,722 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:22,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:22,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1627046370, now seen corresponding path program 1 times [2021-06-14 09:24:22,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:22,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069909262] [2021-06-14 09:24:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:22,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:22,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069909262] [2021-06-14 09:24:22,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069909262] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:22,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:22,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:22,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551556625] [2021-06-14 09:24:22,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:22,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:22,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:22,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:22,740 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:22,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:22,740 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:22,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-06-14 09:24:22,804 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:22,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:22,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1419567909, now seen corresponding path program 1 times [2021-06-14 09:24:22,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:22,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053313133] [2021-06-14 09:24:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:22,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:22,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053313133] [2021-06-14 09:24:22,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053313133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:22,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420203145] [2021-06-14 09:24:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:24:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:22,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:24:22,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:24:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:22,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420203145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:22,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:24:22,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:24:22,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790553859] [2021-06-14 09:24:22,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:22,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:22,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:22,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:22,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:22,895 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:22,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:22,895 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:22,895 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:22,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:22,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:23,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-14 09:24:23,182 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:23,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:23,182 INFO L82 PathProgramCache]: Analyzing trace with hash -858329317, now seen corresponding path program 1 times [2021-06-14 09:24:23,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:23,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886595058] [2021-06-14 09:24:23,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:23,184 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:23,185 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:23,186 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:23,186 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:23,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-06-14 09:24:23,187 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of12ForFork0 was UNSAFE (6/14) [2021-06-14 09:24:23,187 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:23,193 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:23,193 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:23,193 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:23,193 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:23,193 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:23,193 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:23,193 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:23,193 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of12ForFork0======== [2021-06-14 09:24:23,470 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:23,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1885140902, now seen corresponding path program 1 times [2021-06-14 09:24:23,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:23,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105495021] [2021-06-14 09:24:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:23,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:23,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105495021] [2021-06-14 09:24:23,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105495021] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:23,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:23,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:23,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128590003] [2021-06-14 09:24:23,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:23,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:23,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:23,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:23,480 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:23,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:23,480 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:23,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:23,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-06-14 09:24:23,498 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:23,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:23,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1885139941, now seen corresponding path program 1 times [2021-06-14 09:24:23,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:23,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271646866] [2021-06-14 09:24:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:23,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:23,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271646866] [2021-06-14 09:24:23,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271646866] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:23,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:23,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:23,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666818458] [2021-06-14 09:24:23,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:23,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:23,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:23,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:23,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:23,512 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:23,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:23,512 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:23,512 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:23,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-06-14 09:24:23,546 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:23,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1690205405, now seen corresponding path program 1 times [2021-06-14 09:24:23,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:23,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954599803] [2021-06-14 09:24:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:23,548 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:23,549 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:23,550 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:23,550 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:23,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-06-14 09:24:23,551 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of12ForFork0 was UNSAFE (7/14) [2021-06-14 09:24:23,551 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:23,561 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:23,562 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:23,562 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:23,562 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:23,562 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:23,562 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:23,562 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:23,562 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of12ForFork0======== Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:23,839 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:23,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:23,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1656163576, now seen corresponding path program 1 times [2021-06-14 09:24:23,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:23,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707016776] [2021-06-14 09:24:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:24:23,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:23,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707016776] [2021-06-14 09:24:23,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707016776] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:23,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:23,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:23,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411772966] [2021-06-14 09:24:23,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:23,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:23,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:23,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:23,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:23,852 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:23,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:23,853 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:23,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-06-14 09:24:23,872 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1657087097, now seen corresponding path program 1 times [2021-06-14 09:24:23,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:23,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089111483] [2021-06-14 09:24:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:24:23,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:23,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089111483] [2021-06-14 09:24:23,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089111483] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:23,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:23,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:23,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982880015] [2021-06-14 09:24:23,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:23,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:23,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:23,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:23,891 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:23,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:23,892 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:23,892 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:23,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:23,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-06-14 09:24:23,916 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:23,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1657088058, now seen corresponding path program 1 times [2021-06-14 09:24:23,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:23,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251851108] [2021-06-14 09:24:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:23,919 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:23,919 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:23,921 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:23,921 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:23,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-06-14 09:24:23,921 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of12ForFork0 was UNSAFE (8/14) [2021-06-14 09:24:23,921 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:23,930 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:23,930 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:23,930 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:23,930 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:23,930 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:23,930 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:23,930 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:23,930 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:24,220 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:24,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash 306815732, now seen corresponding path program 1 times [2021-06-14 09:24:24,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:24,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138991808] [2021-06-14 09:24:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:24,237 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:24,239 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:24,241 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:24,241 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:24,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-06-14 09:24:24,242 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (9/14) [2021-06-14 09:24:24,242 WARN L243 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:24,242 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2021-06-14 09:24:24,257 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:24,258 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:24,263 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:24,264 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:24,264 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:24,264 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:24,264 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:24,264 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:24,264 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:24,264 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread7of13ForFork0======== [2021-06-14 09:24:24,537 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:24,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:24,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1660405237, now seen corresponding path program 1 times [2021-06-14 09:24:24,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:24,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364950127] [2021-06-14 09:24:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:24:24,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:24,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364950127] [2021-06-14 09:24:24,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364950127] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:24,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:24,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:24,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686144184] [2021-06-14 09:24:24,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:24,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:24,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:24,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:24,558 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:24,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:24,558 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:24,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-06-14 09:24:24,598 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:24,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:24,598 INFO L82 PathProgramCache]: Analyzing trace with hash -67044455, now seen corresponding path program 1 times [2021-06-14 09:24:24,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:24,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373076665] [2021-06-14 09:24:24,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:24:24,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:24,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373076665] [2021-06-14 09:24:24,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373076665] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:24,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:24,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:24,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036267138] [2021-06-14 09:24:24,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:24,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:24,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:24,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:24,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:24,615 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:24,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:24,615 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:24,615 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:24,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-06-14 09:24:24,668 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:24,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:24,668 INFO L82 PathProgramCache]: Analyzing trace with hash -5185645, now seen corresponding path program 1 times [2021-06-14 09:24:24,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:24,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743947697] [2021-06-14 09:24:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:24,671 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:24,673 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:24,674 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:24,674 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:24,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-06-14 09:24:24,675 INFO L301 ceAbstractionStarter]: Result for error location fooThread7of13ForFork0 was UNSAFE (1/15) [2021-06-14 09:24:24,676 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:24,684 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:24,684 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:24,684 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:24,684 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:24,684 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:24,684 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:24,684 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:24,684 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of13ForFork0======== [2021-06-14 09:24:24,956 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:24,956 INFO L82 PathProgramCache]: Analyzing trace with hash -350730725, now seen corresponding path program 1 times [2021-06-14 09:24:24,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:24,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802794403] [2021-06-14 09:24:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:24:24,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:24,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802794403] [2021-06-14 09:24:24,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802794403] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:24,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:24,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:24,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780182642] [2021-06-14 09:24:24,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:24,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:24,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:24,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:24,981 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:24,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:24,981 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:25,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-06-14 09:24:25,007 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:25,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:25,007 INFO L82 PathProgramCache]: Analyzing trace with hash -350729764, now seen corresponding path program 1 times [2021-06-14 09:24:25,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:25,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652503006] [2021-06-14 09:24:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:24:25,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:25,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652503006] [2021-06-14 09:24:25,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652503006] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:25,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:25,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:25,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428053367] [2021-06-14 09:24:25,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:25,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:25,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:25,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:25,032 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:25,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:25,032 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:25,032 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:25,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:25,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-06-14 09:24:25,084 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:25,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:25,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2012279834, now seen corresponding path program 1 times [2021-06-14 09:24:25,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:25,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985429650] [2021-06-14 09:24:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:25,087 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:25,088 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:25,090 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:25,090 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:25,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-06-14 09:24:25,091 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of13ForFork0 was UNSAFE (2/15) [2021-06-14 09:24:25,091 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:25,095 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:25,095 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:25,095 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:25,095 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:25,095 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:25,095 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:25,095 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:25,095 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of13ForFork0======== [2021-06-14 09:24:25,403 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:25,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:25,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1177086417, now seen corresponding path program 1 times [2021-06-14 09:24:25,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:25,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827086310] [2021-06-14 09:24:25,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:24:25,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:25,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827086310] [2021-06-14 09:24:25,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827086310] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:25,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:25,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:25,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266207050] [2021-06-14 09:24:25,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:25,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:25,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:25,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:25,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:25,414 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:25,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:25,414 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:25,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-06-14 09:24:25,446 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:25,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2129941317, now seen corresponding path program 1 times [2021-06-14 09:24:25,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:25,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249430945] [2021-06-14 09:24:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:24:25,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:25,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249430945] [2021-06-14 09:24:25,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249430945] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:25,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:25,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:25,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358931553] [2021-06-14 09:24:25,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:25,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:25,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:25,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:25,472 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:25,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:25,472 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:25,472 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:25,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:25,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-06-14 09:24:25,508 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:25,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1825768129, now seen corresponding path program 1 times [2021-06-14 09:24:25,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:25,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53326582] [2021-06-14 09:24:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:25,511 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:25,512 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:25,513 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:25,513 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:25,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-06-14 09:24:25,514 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of13ForFork0 was UNSAFE (3/15) [2021-06-14 09:24:25,514 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:25,550 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:25,550 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:25,550 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:25,551 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:25,551 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:25,551 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:25,551 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:25,551 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:24:25,818 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (4/15) [2021-06-14 09:24:25,818 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:25,836 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:25,836 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:25,836 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:25,836 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:25,836 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:25,837 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:25,837 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:25,837 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread13of13ForFork0======== [2021-06-14 09:24:26,182 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:26,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:26,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1914598171, now seen corresponding path program 1 times [2021-06-14 09:24:26,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:26,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892871454] [2021-06-14 09:24:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:24:26,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:26,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892871454] [2021-06-14 09:24:26,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892871454] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:26,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:26,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:26,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821528302] [2021-06-14 09:24:26,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:26,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:26,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:26,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:26,196 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:26,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:26,196 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:26,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-06-14 09:24:26,248 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:26,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1027094490, now seen corresponding path program 1 times [2021-06-14 09:24:26,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:26,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109984788] [2021-06-14 09:24:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:24:26,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:26,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109984788] [2021-06-14 09:24:26,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109984788] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:26,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:26,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:26,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889276252] [2021-06-14 09:24:26,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:26,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:26,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:26,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:26,267 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:26,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:26,267 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:26,267 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:26,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:26,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-06-14 09:24:26,340 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:26,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1026170969, now seen corresponding path program 1 times [2021-06-14 09:24:26,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:26,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109020586] [2021-06-14 09:24:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:26,343 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:26,344 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:26,346 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:26,346 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:26,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-06-14 09:24:26,347 INFO L301 ceAbstractionStarter]: Result for error location fooThread13of13ForFork0 was UNSAFE (5/15) [2021-06-14 09:24:26,347 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:26,359 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:26,359 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:26,359 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:26,359 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:26,359 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:26,359 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:26,359 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:26,359 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of13ForFork0======== Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:26,602 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:26,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1402330988, now seen corresponding path program 1 times [2021-06-14 09:24:26,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:26,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401755849] [2021-06-14 09:24:26,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:26,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:26,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401755849] [2021-06-14 09:24:26,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401755849] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:26,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:26,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:26,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227676603] [2021-06-14 09:24:26,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:26,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:26,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:26,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:26,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:26,611 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:26,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:26,611 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:26,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:26,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-06-14 09:24:26,670 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:26,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:26,670 INFO L82 PathProgramCache]: Analyzing trace with hash 274374571, now seen corresponding path program 1 times [2021-06-14 09:24:26,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:26,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890765248] [2021-06-14 09:24:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:26,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:26,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890765248] [2021-06-14 09:24:26,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890765248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:26,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008195616] [2021-06-14 09:24:26,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:24:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:26,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:24:26,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:24:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:26,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008195616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:26,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:24:26,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:24:26,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661495536] [2021-06-14 09:24:26,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:26,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:26,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:26,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:26,754 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:26,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:26,754 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:26,754 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:26,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:27,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-14 09:24:27,035 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:27,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:27,035 INFO L82 PathProgramCache]: Analyzing trace with hash -434776165, now seen corresponding path program 1 times [2021-06-14 09:24:27,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:27,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642857647] [2021-06-14 09:24:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:27,038 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:27,038 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:27,039 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:27,039 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:27,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-06-14 09:24:27,040 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of13ForFork0 was UNSAFE (6/15) [2021-06-14 09:24:27,040 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:27,044 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:27,044 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:27,044 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:27,044 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:27,044 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:27,044 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:27,044 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:27,044 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread9of13ForFork0======== [2021-06-14 09:24:27,312 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:27,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:27,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1056127484, now seen corresponding path program 1 times [2021-06-14 09:24:27,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:27,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474534085] [2021-06-14 09:24:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:24:27,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:27,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474534085] [2021-06-14 09:24:27,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474534085] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:27,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:27,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:27,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402986987] [2021-06-14 09:24:27,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:27,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:27,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:27,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:27,327 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:27,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:27,327 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:27,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-06-14 09:24:27,363 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:27,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1431385349, now seen corresponding path program 1 times [2021-06-14 09:24:27,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:27,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506337603] [2021-06-14 09:24:27,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:24:27,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:27,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506337603] [2021-06-14 09:24:27,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506337603] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:27,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:27,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:27,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473383740] [2021-06-14 09:24:27,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:27,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:27,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:27,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:27,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:27,378 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:27,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:27,378 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:27,378 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:27,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:27,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:27,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-06-14 09:24:27,420 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:27,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:27,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1976078266, now seen corresponding path program 1 times [2021-06-14 09:24:27,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:27,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551333272] [2021-06-14 09:24:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:27,423 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:27,425 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:27,426 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:27,426 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:27,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-06-14 09:24:27,427 INFO L301 ceAbstractionStarter]: Result for error location fooThread9of13ForFork0 was UNSAFE (7/15) [2021-06-14 09:24:27,427 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:27,442 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:27,442 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:27,442 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:27,442 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:27,442 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:27,442 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:27,443 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:27,443 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of13ForFork0======== Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:27,739 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:27,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:27,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1778510604, now seen corresponding path program 1 times [2021-06-14 09:24:27,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:27,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86672846] [2021-06-14 09:24:27,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:27,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:27,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86672846] [2021-06-14 09:24:27,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86672846] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:27,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:27,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:27,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201091036] [2021-06-14 09:24:27,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:27,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:27,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:27,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:27,752 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:27,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:27,752 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:27,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:27,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-06-14 09:24:27,767 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:27,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1778511565, now seen corresponding path program 1 times [2021-06-14 09:24:27,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:27,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417322283] [2021-06-14 09:24:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:27,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:27,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417322283] [2021-06-14 09:24:27,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417322283] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:27,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:27,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:27,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316623445] [2021-06-14 09:24:27,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:27,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:27,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:27,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:27,785 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:27,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:27,785 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:27,785 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:27,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-06-14 09:24:27,882 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:27,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:27,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1650052391, now seen corresponding path program 1 times [2021-06-14 09:24:27,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:27,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282795596] [2021-06-14 09:24:27,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:27,884 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:27,885 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:27,885 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:27,885 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:27,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-06-14 09:24:27,886 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of13ForFork0 was UNSAFE (8/15) [2021-06-14 09:24:27,886 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:27,895 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:27,895 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:27,895 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:27,896 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:27,896 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:27,896 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:27,896 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:27,896 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread12of13ForFork0======== [2021-06-14 09:24:28,173 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:28,173 INFO L82 PathProgramCache]: Analyzing trace with hash -850437122, now seen corresponding path program 1 times [2021-06-14 09:24:28,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:28,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227961542] [2021-06-14 09:24:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:24:28,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:28,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227961542] [2021-06-14 09:24:28,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227961542] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:28,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:28,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:28,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157828195] [2021-06-14 09:24:28,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:28,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:28,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:28,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:28,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:28,185 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:28,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:28,186 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:28,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-06-14 09:24:28,248 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:28,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1143840129, now seen corresponding path program 1 times [2021-06-14 09:24:28,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:28,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865173589] [2021-06-14 09:24:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:24:28,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:28,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865173589] [2021-06-14 09:24:28,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865173589] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:28,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:28,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:28,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16083066] [2021-06-14 09:24:28,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:28,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:28,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:28,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:28,264 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:28,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:28,265 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:28,265 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:28,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-06-14 09:24:28,330 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:28,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1354175808, now seen corresponding path program 1 times [2021-06-14 09:24:28,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:28,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567639523] [2021-06-14 09:24:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:28,334 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:28,336 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:28,338 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:28,338 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:28,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-06-14 09:24:28,339 INFO L301 ceAbstractionStarter]: Result for error location fooThread12of13ForFork0 was UNSAFE (9/15) [2021-06-14 09:24:28,339 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:28,370 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:28,370 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:28,370 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:28,370 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:28,370 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:28,370 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:28,370 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:28,370 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:28,658 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:28,659 INFO L82 PathProgramCache]: Analyzing trace with hash 208689816, now seen corresponding path program 1 times [2021-06-14 09:24:28,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:28,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554042426] [2021-06-14 09:24:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:28,661 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:28,663 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:28,664 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:28,665 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:28,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-06-14 09:24:28,665 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (10/15) [2021-06-14 09:24:28,665 WARN L243 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:28,665 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2021-06-14 09:24:28,682 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:28,683 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:28,703 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:28,703 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:28,703 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:28,703 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:28,704 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:28,704 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:28,704 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:28,704 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of14ForFork0======== [2021-06-14 09:24:28,972 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:28,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:28,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1267020596, now seen corresponding path program 1 times [2021-06-14 09:24:28,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:28,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340892866] [2021-06-14 09:24:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:24:28,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:28,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340892866] [2021-06-14 09:24:28,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340892866] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:28,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:28,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:28,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349750991] [2021-06-14 09:24:28,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:28,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:28,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:28,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:28,983 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:28,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:28,983 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:29,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:29,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-06-14 09:24:29,016 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:29,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:29,016 INFO L82 PathProgramCache]: Analyzing trace with hash 622933513, now seen corresponding path program 1 times [2021-06-14 09:24:29,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:29,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100160732] [2021-06-14 09:24:29,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:24:29,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:29,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100160732] [2021-06-14 09:24:29,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100160732] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:29,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:29,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:29,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161524885] [2021-06-14 09:24:29,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:29,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:29,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:29,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:29,034 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:29,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:29,034 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:29,034 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:29,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-06-14 09:24:29,076 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1638677071, now seen corresponding path program 1 times [2021-06-14 09:24:29,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:29,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75070258] [2021-06-14 09:24:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:29,079 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:29,080 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:29,081 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:29,081 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:29,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-06-14 09:24:29,082 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of14ForFork0 was UNSAFE (1/16) [2021-06-14 09:24:29,082 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:29,098 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:29,098 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:29,098 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:29,098 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:29,098 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:29,098 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:29,098 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:29,098 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of14ForFork0======== Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:29,435 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:29,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:29,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1540641363, now seen corresponding path program 1 times [2021-06-14 09:24:29,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:29,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455631094] [2021-06-14 09:24:29,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:29,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:29,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455631094] [2021-06-14 09:24:29,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455631094] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:29,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:29,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:29,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483014696] [2021-06-14 09:24:29,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:29,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:29,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:29,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:29,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:29,447 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:29,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:29,447 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:29,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:29,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-06-14 09:24:29,471 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:29,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:29,472 INFO L82 PathProgramCache]: Analyzing trace with hash -515240548, now seen corresponding path program 1 times [2021-06-14 09:24:29,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:29,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331619901] [2021-06-14 09:24:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:29,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:29,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331619901] [2021-06-14 09:24:29,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331619901] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:29,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:29,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:29,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481755029] [2021-06-14 09:24:29,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:29,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:29,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:29,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:29,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:29,487 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:29,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:29,487 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:29,487 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:29,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:29,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:29,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-06-14 09:24:29,523 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:29,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1224879050, now seen corresponding path program 1 times [2021-06-14 09:24:29,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:29,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912271649] [2021-06-14 09:24:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:29,525 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:29,526 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:29,527 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:29,527 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:29,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-06-14 09:24:29,528 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of14ForFork0 was UNSAFE (2/16) [2021-06-14 09:24:29,528 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:29,533 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:29,533 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:29,533 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:29,533 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:29,533 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:29,533 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:29,533 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:29,533 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread9of14ForFork0======== [2021-06-14 09:24:29,818 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:29,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:29,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1863363503, now seen corresponding path program 1 times [2021-06-14 09:24:29,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:29,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923839250] [2021-06-14 09:24:29,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:24:29,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:29,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923839250] [2021-06-14 09:24:29,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923839250] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:29,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:29,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:29,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869880164] [2021-06-14 09:24:29,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:29,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:29,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:29,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:29,835 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:29,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:29,836 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:29,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:29,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-06-14 09:24:29,872 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1862439982, now seen corresponding path program 1 times [2021-06-14 09:24:29,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:29,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986764862] [2021-06-14 09:24:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:24:29,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:29,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986764862] [2021-06-14 09:24:29,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986764862] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:29,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:29,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:29,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962237583] [2021-06-14 09:24:29,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:29,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:29,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:29,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:29,887 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:29,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:29,887 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:29,887 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:29,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:29,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:29,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-06-14 09:24:29,932 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1862439021, now seen corresponding path program 1 times [2021-06-14 09:24:29,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:29,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341580571] [2021-06-14 09:24:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:29,935 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:29,937 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:29,938 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:29,938 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:29,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-06-14 09:24:29,942 INFO L301 ceAbstractionStarter]: Result for error location fooThread9of14ForFork0 was UNSAFE (3/16) [2021-06-14 09:24:29,942 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:29,946 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:29,946 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:29,946 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:29,946 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:29,946 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:29,947 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:29,947 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:29,947 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:24:30,246 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (4/16) [2021-06-14 09:24:30,246 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:30,250 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:30,250 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:30,250 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:30,250 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:30,250 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:30,250 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:30,250 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:30,250 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of14ForFork0======== [2021-06-14 09:24:30,530 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:30,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:30,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1520942265, now seen corresponding path program 1 times [2021-06-14 09:24:30,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:30,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546812545] [2021-06-14 09:24:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:24:30,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:30,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546812545] [2021-06-14 09:24:30,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546812545] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:30,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:30,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:30,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182012443] [2021-06-14 09:24:30,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:30,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:30,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:30,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:30,546 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:30,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:30,546 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:30,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2021-06-14 09:24:30,572 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:30,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:30,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1520018744, now seen corresponding path program 1 times [2021-06-14 09:24:30,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:30,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354571850] [2021-06-14 09:24:30,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:24:30,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:30,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354571850] [2021-06-14 09:24:30,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354571850] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:30,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:30,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:30,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994751417] [2021-06-14 09:24:30,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:30,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:30,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:30,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:30,595 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:30,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:30,595 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:30,595 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:30,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-06-14 09:24:30,629 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:30,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:30,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1520017783, now seen corresponding path program 1 times [2021-06-14 09:24:30,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:30,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204326861] [2021-06-14 09:24:30,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:30,631 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:30,632 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:30,633 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:30,633 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:30,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2021-06-14 09:24:30,633 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of14ForFork0 was UNSAFE (5/16) [2021-06-14 09:24:30,634 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:30,638 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:30,638 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:30,638 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:30,638 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:30,638 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:30,638 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:30,638 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:30,638 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread12of14ForFork0======== [2021-06-14 09:24:31,051 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:31,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1306634103, now seen corresponding path program 1 times [2021-06-14 09:24:31,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:31,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348630584] [2021-06-14 09:24:31,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:24:31,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:31,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348630584] [2021-06-14 09:24:31,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348630584] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:31,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:31,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:31,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464374016] [2021-06-14 09:24:31,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:31,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:31,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:31,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:31,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:31,064 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:31,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:31,064 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:31,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2021-06-14 09:24:31,126 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:31,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:31,127 INFO L82 PathProgramCache]: Analyzing trace with hash -500820360, now seen corresponding path program 1 times [2021-06-14 09:24:31,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:31,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406061070] [2021-06-14 09:24:31,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:24:31,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:31,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406061070] [2021-06-14 09:24:31,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406061070] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:31,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:31,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:31,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439862268] [2021-06-14 09:24:31,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:31,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:31,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:31,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:31,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:31,148 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:31,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:31,148 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:31,148 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:31,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2021-06-14 09:24:31,209 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:31,209 INFO L82 PathProgramCache]: Analyzing trace with hash 386683321, now seen corresponding path program 1 times [2021-06-14 09:24:31,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:31,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314418167] [2021-06-14 09:24:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:31,213 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:31,215 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:31,217 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:31,217 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:31,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2021-06-14 09:24:31,218 INFO L301 ceAbstractionStarter]: Result for error location fooThread12of14ForFork0 was UNSAFE (6/16) [2021-06-14 09:24:31,218 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:31,228 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:31,228 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:31,228 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:31,228 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:31,228 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:31,228 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:31,228 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:31,229 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread7of14ForFork0======== [2021-06-14 09:24:31,568 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:31,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:31,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1574736766, now seen corresponding path program 1 times [2021-06-14 09:24:31,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:31,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169226317] [2021-06-14 09:24:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:24:31,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:31,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169226317] [2021-06-14 09:24:31,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169226317] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:31,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:31,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:31,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307395416] [2021-06-14 09:24:31,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:31,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:31,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:31,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:31,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:31,582 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:31,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:31,582 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:31,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:31,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2021-06-14 09:24:31,605 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:31,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:31,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1575660287, now seen corresponding path program 1 times [2021-06-14 09:24:31,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:31,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168583358] [2021-06-14 09:24:31,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:24:31,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:31,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168583358] [2021-06-14 09:24:31,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168583358] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:31,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:31,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:31,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166662815] [2021-06-14 09:24:31,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:31,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:31,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:31,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:31,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:31,617 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:31,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:31,617 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:31,617 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:31,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2021-06-14 09:24:31,646 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:31,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:31,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1575661248, now seen corresponding path program 1 times [2021-06-14 09:24:31,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:31,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560836804] [2021-06-14 09:24:31,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:31,649 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:31,650 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:31,652 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:31,652 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:31,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2021-06-14 09:24:31,652 INFO L301 ceAbstractionStarter]: Result for error location fooThread7of14ForFork0 was UNSAFE (7/16) [2021-06-14 09:24:31,653 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:31,656 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:31,656 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:31,656 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:31,656 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:31,656 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:31,656 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:31,656 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:31,656 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread13of14ForFork0======== [2021-06-14 09:24:31,973 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:31,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:31,974 INFO L82 PathProgramCache]: Analyzing trace with hash -999347961, now seen corresponding path program 1 times [2021-06-14 09:24:31,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:31,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275875307] [2021-06-14 09:24:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:24:31,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:31,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275875307] [2021-06-14 09:24:31,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275875307] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:31,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:31,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:31,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828648649] [2021-06-14 09:24:31,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:31,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:31,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:31,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:31,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:31,993 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:31,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:31,994 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:32,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:32,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2021-06-14 09:24:32,054 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:32,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1292750968, now seen corresponding path program 1 times [2021-06-14 09:24:32,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:32,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622240127] [2021-06-14 09:24:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:24:32,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:32,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622240127] [2021-06-14 09:24:32,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622240127] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:32,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:32,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:32,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866051954] [2021-06-14 09:24:32,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:32,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:32,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:32,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:32,073 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:32,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:32,073 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:32,073 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:32,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:32,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-06-14 09:24:32,153 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:32,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:32,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1205264969, now seen corresponding path program 1 times [2021-06-14 09:24:32,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:32,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437949100] [2021-06-14 09:24:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:32,158 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:32,160 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:32,162 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:32,163 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:32,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2021-06-14 09:24:32,163 INFO L301 ceAbstractionStarter]: Result for error location fooThread13of14ForFork0 was UNSAFE (8/16) [2021-06-14 09:24:32,163 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:32,174 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:32,174 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:32,174 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:32,174 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:32,174 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:32,174 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:32,174 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:32,174 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread14of14ForFork0======== Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:32,557 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:32,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:32,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1947765111, now seen corresponding path program 1 times [2021-06-14 09:24:32,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:32,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303728377] [2021-06-14 09:24:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:24:32,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:32,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303728377] [2021-06-14 09:24:32,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303728377] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:32,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:32,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:32,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659138263] [2021-06-14 09:24:32,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:32,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:32,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:32,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:32,572 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:32,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:32,572 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:32,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2021-06-14 09:24:32,722 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:32,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:32,722 INFO L82 PathProgramCache]: Analyzing trace with hash -839650376, now seen corresponding path program 1 times [2021-06-14 09:24:32,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:32,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468278892] [2021-06-14 09:24:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:24:32,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:32,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468278892] [2021-06-14 09:24:32,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468278892] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:32,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:32,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:32,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561139314] [2021-06-14 09:24:32,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:32,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:32,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:32,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:32,742 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:32,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:32,742 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:32,742 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:32,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-06-14 09:24:32,836 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:32,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:32,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1133053383, now seen corresponding path program 1 times [2021-06-14 09:24:32,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:32,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233462680] [2021-06-14 09:24:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:32,840 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:32,842 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:32,844 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:32,845 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:32,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-06-14 09:24:32,846 INFO L301 ceAbstractionStarter]: Result for error location fooThread14of14ForFork0 was UNSAFE (9/16) [2021-06-14 09:24:32,846 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:32,853 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:32,853 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:32,853 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:32,853 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:32,853 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:32,853 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:32,853 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:32,853 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of14ForFork0======== Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:33,174 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:33,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:33,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1468084123, now seen corresponding path program 1 times [2021-06-14 09:24:33,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:33,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096641414] [2021-06-14 09:24:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:33,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:33,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096641414] [2021-06-14 09:24:33,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096641414] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:33,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:33,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:33,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097664151] [2021-06-14 09:24:33,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:33,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:33,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:33,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:33,183 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:33,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:33,183 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:33,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2021-06-14 09:24:33,252 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:33,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:33,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1067514875, now seen corresponding path program 1 times [2021-06-14 09:24:33,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:33,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612217010] [2021-06-14 09:24:33,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:33,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:33,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612217010] [2021-06-14 09:24:33,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612217010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:33,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129616368] [2021-06-14 09:24:33,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:24:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:33,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:24:33,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:24:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:33,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129616368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:33,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:24:33,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:24:33,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629071502] [2021-06-14 09:24:33,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:33,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:33,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:33,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:33,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:33,378 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:33,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:33,378 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:33,378 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:33,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:24:33,682 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:33,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:33,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1348540867, now seen corresponding path program 1 times [2021-06-14 09:24:33,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:33,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089849348] [2021-06-14 09:24:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:33,684 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:33,685 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:33,686 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:33,686 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:33,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2021-06-14 09:24:33,687 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of14ForFork0 was UNSAFE (10/16) [2021-06-14 09:24:33,687 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:33,701 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:33,701 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:33,702 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:33,702 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:33,702 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:33,702 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:33,702 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:33,702 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread11of14ForFork0======== Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:34,015 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:34,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:34,015 INFO L82 PathProgramCache]: Analyzing trace with hash 820065068, now seen corresponding path program 1 times [2021-06-14 09:24:34,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:34,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689903556] [2021-06-14 09:24:34,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:24:34,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:34,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689903556] [2021-06-14 09:24:34,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689903556] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:34,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:34,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:34,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175486890] [2021-06-14 09:24:34,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:34,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:34,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:34,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:34,039 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:34,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:34,039 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:34,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:34,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2021-06-14 09:24:34,088 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:34,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:34,088 INFO L82 PathProgramCache]: Analyzing trace with hash 526662061, now seen corresponding path program 1 times [2021-06-14 09:24:34,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:34,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222537099] [2021-06-14 09:24:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:24:34,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:34,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222537099] [2021-06-14 09:24:34,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222537099] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:34,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:34,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:34,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369626369] [2021-06-14 09:24:34,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:34,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:34,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:34,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:34,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:34,101 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:34,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:34,102 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:34,102 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:34,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2021-06-14 09:24:34,176 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:34,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1270289298, now seen corresponding path program 1 times [2021-06-14 09:24:34,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:34,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463724278] [2021-06-14 09:24:34,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:34,179 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:34,181 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:34,183 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:34,183 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:34,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2021-06-14 09:24:34,184 INFO L301 ceAbstractionStarter]: Result for error location fooThread11of14ForFork0 was UNSAFE (11/16) [2021-06-14 09:24:34,184 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:34,202 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:34,202 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:34,202 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:34,202 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:34,202 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:34,202 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:34,202 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:34,202 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of14ForFork0======== Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:34,467 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:34,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1578093185, now seen corresponding path program 1 times [2021-06-14 09:24:34,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:34,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224837801] [2021-06-14 09:24:34,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:34,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:34,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224837801] [2021-06-14 09:24:34,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224837801] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:34,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:34,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:34,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826179373] [2021-06-14 09:24:34,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:34,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:34,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:34,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:34,488 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:34,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:34,488 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:34,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:34,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2021-06-14 09:24:34,505 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:34,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:34,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1578092224, now seen corresponding path program 1 times [2021-06-14 09:24:34,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:34,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287611319] [2021-06-14 09:24:34,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:34,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:34,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287611319] [2021-06-14 09:24:34,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287611319] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:34,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:34,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:34,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987223210] [2021-06-14 09:24:34,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:34,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:34,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:34,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:34,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:34,526 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:34,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:34,526 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:34,526 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:34,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2021-06-14 09:24:34,617 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:34,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1696129745, now seen corresponding path program 1 times [2021-06-14 09:24:34,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:34,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594049416] [2021-06-14 09:24:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:34,619 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:34,620 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:34,621 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:34,621 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:34,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2021-06-14 09:24:34,621 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of14ForFork0 was UNSAFE (12/16) [2021-06-14 09:24:34,622 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:34,625 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:34,625 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:34,625 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:34,625 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:34,625 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:34,625 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:34,625 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:34,625 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread10of14ForFork0======== [2021-06-14 09:24:35,006 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:35,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:35,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1232296641, now seen corresponding path program 1 times [2021-06-14 09:24:35,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:35,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407890092] [2021-06-14 09:24:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:24:35,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:35,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407890092] [2021-06-14 09:24:35,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407890092] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:35,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:35,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:35,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177642057] [2021-06-14 09:24:35,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:35,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:35,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:35,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:35,019 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:35,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:35,019 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:35,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:35,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2021-06-14 09:24:35,066 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:35,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:35,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1555118846, now seen corresponding path program 1 times [2021-06-14 09:24:35,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:35,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630134711] [2021-06-14 09:24:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:24:35,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:35,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630134711] [2021-06-14 09:24:35,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630134711] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:35,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:35,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:35,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730767533] [2021-06-14 09:24:35,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:35,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:35,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:35,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:35,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:35,079 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:35,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:35,079 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:35,080 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:35,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2021-06-14 09:24:35,137 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:35,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1848521853, now seen corresponding path program 1 times [2021-06-14 09:24:35,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:35,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698317128] [2021-06-14 09:24:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:35,140 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:35,144 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:35,146 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:35,146 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:35,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2021-06-14 09:24:35,147 INFO L301 ceAbstractionStarter]: Result for error location fooThread10of14ForFork0 was UNSAFE (13/16) [2021-06-14 09:24:35,147 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:35,162 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:35,162 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:35,162 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:35,162 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:35,162 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:35,162 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:35,162 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:35,162 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:35,456 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:35,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:35,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1880288854, now seen corresponding path program 1 times [2021-06-14 09:24:35,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:35,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61920888] [2021-06-14 09:24:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:35,461 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:35,462 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:35,464 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:35,464 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:35,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2021-06-14 09:24:35,465 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (14/16) [2021-06-14 09:24:35,465 WARN L243 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:35,465 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2021-06-14 09:24:35,482 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:35,483 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:35,487 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:35,487 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:35,487 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:35,487 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:35,487 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:35,488 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:35,488 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:35,488 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of15ForFork0======== [2021-06-14 09:24:35,790 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:35,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:35,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1710953593, now seen corresponding path program 1 times [2021-06-14 09:24:35,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:35,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026469515] [2021-06-14 09:24:35,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:24:35,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:35,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026469515] [2021-06-14 09:24:35,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026469515] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:35,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:35,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:35,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439419769] [2021-06-14 09:24:35,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:35,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:35,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:35,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:35,800 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:35,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:35,800 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:35,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:35,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2021-06-14 09:24:35,826 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:35,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:35,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1499952926, now seen corresponding path program 1 times [2021-06-14 09:24:35,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:35,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821451694] [2021-06-14 09:24:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:24:35,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:35,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821451694] [2021-06-14 09:24:35,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821451694] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:35,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:35,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:35,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226915770] [2021-06-14 09:24:35,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:35,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:35,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:35,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:35,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:35,837 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:35,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:35,837 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:35,837 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:35,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2021-06-14 09:24:35,869 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:35,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:35,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1654281692, now seen corresponding path program 1 times [2021-06-14 09:24:35,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:35,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597854977] [2021-06-14 09:24:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:35,872 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:35,873 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:35,874 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:35,874 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:35,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2021-06-14 09:24:35,874 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of15ForFork0 was UNSAFE (1/17) [2021-06-14 09:24:35,875 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:35,902 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:35,902 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:35,902 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:35,902 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:35,902 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:35,903 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:35,903 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:35,903 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of15ForFork0======== [2021-06-14 09:24:36,214 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:36,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:36,214 INFO L82 PathProgramCache]: Analyzing trace with hash -304330318, now seen corresponding path program 1 times [2021-06-14 09:24:36,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:36,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49600914] [2021-06-14 09:24:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:36,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:36,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49600914] [2021-06-14 09:24:36,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49600914] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:36,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:36,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:36,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638760935] [2021-06-14 09:24:36,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:36,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:36,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:36,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:36,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:36,223 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:36,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:36,223 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:36,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-06-14 09:24:36,242 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:36,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:36,242 INFO L82 PathProgramCache]: Analyzing trace with hash -304329357, now seen corresponding path program 1 times [2021-06-14 09:24:36,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:36,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549495686] [2021-06-14 09:24:36,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:36,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:36,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549495686] [2021-06-14 09:24:36,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549495686] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:36,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:36,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:36,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962247377] [2021-06-14 09:24:36,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:36,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:36,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:36,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:36,259 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:36,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:36,259 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:36,259 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:36,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2021-06-14 09:24:36,294 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:36,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:36,295 INFO L82 PathProgramCache]: Analyzing trace with hash -844274690, now seen corresponding path program 1 times [2021-06-14 09:24:36,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:36,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969020659] [2021-06-14 09:24:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:36,296 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:36,297 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:36,298 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:36,298 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:36,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-06-14 09:24:36,299 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of15ForFork0 was UNSAFE (2/17) [2021-06-14 09:24:36,299 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:36,313 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:36,313 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:36,313 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:36,313 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:36,313 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:36,313 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:36,313 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:36,313 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of15ForFork0======== [2021-06-14 09:24:36,708 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:36,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1990668866, now seen corresponding path program 1 times [2021-06-14 09:24:36,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:36,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194024905] [2021-06-14 09:24:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:36,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:36,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194024905] [2021-06-14 09:24:36,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194024905] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:36,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:36,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:36,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559616388] [2021-06-14 09:24:36,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:36,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:36,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:36,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:36,716 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:36,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:36,716 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:36,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-06-14 09:24:36,737 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:36,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:36,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1581190797, now seen corresponding path program 1 times [2021-06-14 09:24:36,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:36,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759266213] [2021-06-14 09:24:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:36,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:36,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759266213] [2021-06-14 09:24:36,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759266213] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:36,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:36,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:36,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574620381] [2021-06-14 09:24:36,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:36,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:36,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:36,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:36,750 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:36,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:36,750 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:36,750 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:36,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:36,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:36,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2021-06-14 09:24:36,779 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:36,779 INFO L82 PathProgramCache]: Analyzing trace with hash 894129997, now seen corresponding path program 1 times [2021-06-14 09:24:36,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:36,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796538929] [2021-06-14 09:24:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:36,781 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:36,782 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:36,783 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:36,783 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:36,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2021-06-14 09:24:36,784 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of15ForFork0 was UNSAFE (3/17) [2021-06-14 09:24:36,784 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:36,811 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:36,812 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:36,812 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:36,812 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:36,812 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:36,812 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:36,812 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:36,812 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:37,152 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (4/17) [2021-06-14 09:24:37,152 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:37,156 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:37,156 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:37,156 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:37,156 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:37,156 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:37,156 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:37,156 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:37,156 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread7of15ForFork0======== [2021-06-14 09:24:37,487 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:37,487 INFO L82 PathProgramCache]: Analyzing trace with hash -53761973, now seen corresponding path program 1 times [2021-06-14 09:24:37,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:37,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010671059] [2021-06-14 09:24:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:24:37,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:37,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010671059] [2021-06-14 09:24:37,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010671059] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:37,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:37,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:37,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452228783] [2021-06-14 09:24:37,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:37,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:37,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:37,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:37,502 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:37,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:37,502 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:37,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2021-06-14 09:24:37,534 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:37,535 INFO L82 PathProgramCache]: Analyzing trace with hash 833741708, now seen corresponding path program 1 times [2021-06-14 09:24:37,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:37,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810238610] [2021-06-14 09:24:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:24:37,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:37,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810238610] [2021-06-14 09:24:37,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810238610] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:37,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:37,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:37,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142890250] [2021-06-14 09:24:37,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:37,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:37,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:37,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:37,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:37,555 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:37,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:37,555 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:37,555 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:37,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2021-06-14 09:24:37,598 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:37,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:37,599 INFO L82 PathProgramCache]: Analyzing trace with hash 834665229, now seen corresponding path program 1 times [2021-06-14 09:24:37,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:37,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950560826] [2021-06-14 09:24:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:37,601 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:37,603 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:37,604 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:37,604 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:37,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2021-06-14 09:24:37,604 INFO L301 ceAbstractionStarter]: Result for error location fooThread7of15ForFork0 was UNSAFE (5/17) [2021-06-14 09:24:37,605 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:37,617 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:37,617 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:37,617 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:37,618 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:37,618 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:37,618 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:37,618 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:37,618 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of15ForFork0======== Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:37,987 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:37,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:37,987 INFO L82 PathProgramCache]: Analyzing trace with hash 288967679, now seen corresponding path program 1 times [2021-06-14 09:24:37,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:37,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932477581] [2021-06-14 09:24:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:24:37,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:37,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932477581] [2021-06-14 09:24:37,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932477581] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:37,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:37,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:37,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278090294] [2021-06-14 09:24:37,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:37,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:37,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:37,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:37,997 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:37,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:37,997 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:38,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:38,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2021-06-14 09:24:38,023 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:38,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:38,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1176471360, now seen corresponding path program 1 times [2021-06-14 09:24:38,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:38,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84697353] [2021-06-14 09:24:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:24:38,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:38,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84697353] [2021-06-14 09:24:38,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84697353] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:38,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:38,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:38,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280928736] [2021-06-14 09:24:38,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:38,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:38,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:38,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:38,038 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:38,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:38,038 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:38,038 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:38,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:38,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:38,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2021-06-14 09:24:38,067 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:38,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:38,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1177394881, now seen corresponding path program 1 times [2021-06-14 09:24:38,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:38,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735766045] [2021-06-14 09:24:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:38,069 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:38,070 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:38,071 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:38,072 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:38,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2021-06-14 09:24:38,072 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of15ForFork0 was UNSAFE (6/17) [2021-06-14 09:24:38,072 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:38,078 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:38,078 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:38,078 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:38,078 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:38,078 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:38,078 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:38,078 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:38,078 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread11of15ForFork0======== [2021-06-14 09:24:38,502 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:38,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1932427271, now seen corresponding path program 1 times [2021-06-14 09:24:38,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:38,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311364380] [2021-06-14 09:24:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:24:38,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:38,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311364380] [2021-06-14 09:24:38,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311364380] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:38,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:38,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:38,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127050705] [2021-06-14 09:24:38,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:38,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:38,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:38,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:38,513 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:38,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:38,513 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:38,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2021-06-14 09:24:38,583 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:38,583 INFO L82 PathProgramCache]: Analyzing trace with hash 135475912, now seen corresponding path program 1 times [2021-06-14 09:24:38,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:38,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946748253] [2021-06-14 09:24:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:24:38,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:38,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946748253] [2021-06-14 09:24:38,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946748253] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:38,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:38,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:38,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368922540] [2021-06-14 09:24:38,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:38,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:38,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:38,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:38,600 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:38,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:38,601 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:38,601 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:38,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2021-06-14 09:24:38,676 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:38,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:38,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1671978551, now seen corresponding path program 1 times [2021-06-14 09:24:38,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:38,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068835028] [2021-06-14 09:24:38,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:38,680 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:38,682 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:38,683 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:38,684 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:38,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2021-06-14 09:24:38,684 INFO L301 ceAbstractionStarter]: Result for error location fooThread11of15ForFork0 was UNSAFE (7/17) [2021-06-14 09:24:38,685 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:38,735 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:38,735 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:38,735 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:38,735 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:38,735 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:38,735 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:38,735 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:38,735 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread12of15ForFork0======== [2021-06-14 09:24:39,143 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:39,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:39,143 INFO L82 PathProgramCache]: Analyzing trace with hash 898978681, now seen corresponding path program 1 times [2021-06-14 09:24:39,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:39,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062858670] [2021-06-14 09:24:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:24:39,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:39,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062858670] [2021-06-14 09:24:39,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062858670] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:39,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:39,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:39,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700201623] [2021-06-14 09:24:39,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:39,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:39,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:39,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:39,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:39,162 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:39,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:39,162 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:39,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2021-06-14 09:24:39,216 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:39,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:39,217 INFO L82 PathProgramCache]: Analyzing trace with hash 605575674, now seen corresponding path program 1 times [2021-06-14 09:24:39,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:39,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813469295] [2021-06-14 09:24:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:24:39,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:39,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813469295] [2021-06-14 09:24:39,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813469295] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:39,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:39,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:39,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788231134] [2021-06-14 09:24:39,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:39,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:39,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:39,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:39,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:39,239 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:39,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:39,240 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:39,240 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:39,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:39,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:39,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2021-06-14 09:24:39,317 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:39,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1191375685, now seen corresponding path program 1 times [2021-06-14 09:24:39,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:39,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776248183] [2021-06-14 09:24:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:39,320 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:39,322 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:39,324 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:39,324 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:39,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2021-06-14 09:24:39,325 INFO L301 ceAbstractionStarter]: Result for error location fooThread12of15ForFork0 was UNSAFE (8/17) [2021-06-14 09:24:39,325 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:39,340 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:39,340 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:39,340 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:39,340 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:39,340 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:39,340 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:39,340 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:39,340 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread13of15ForFork0======== [2021-06-14 09:24:39,733 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:39,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:39,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1585126356, now seen corresponding path program 1 times [2021-06-14 09:24:39,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:39,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582389775] [2021-06-14 09:24:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:24:39,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:39,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582389775] [2021-06-14 09:24:39,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582389775] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:39,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:39,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:39,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988211933] [2021-06-14 09:24:39,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:39,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:39,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:39,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:39,752 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:39,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:39,752 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:39,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2021-06-14 09:24:39,823 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:39,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:39,824 INFO L82 PathProgramCache]: Analyzing trace with hash -77574547, now seen corresponding path program 1 times [2021-06-14 09:24:39,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:39,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305185894] [2021-06-14 09:24:39,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:24:39,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:39,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305185894] [2021-06-14 09:24:39,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305185894] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:39,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:39,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:39,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36521500] [2021-06-14 09:24:39,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:39,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:39,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:39,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:39,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:39,839 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:39,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:39,840 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:39,840 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:39,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2021-06-14 09:24:39,923 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:39,923 INFO L82 PathProgramCache]: Analyzing trace with hash -370977554, now seen corresponding path program 1 times [2021-06-14 09:24:39,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:39,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109473812] [2021-06-14 09:24:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:39,926 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:39,927 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:39,929 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:39,929 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:39,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2021-06-14 09:24:39,930 INFO L301 ceAbstractionStarter]: Result for error location fooThread13of15ForFork0 was UNSAFE (9/17) [2021-06-14 09:24:39,930 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:39,934 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:39,934 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:39,934 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:39,934 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:39,934 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:39,934 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:39,934 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:39,934 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread10of15ForFork0======== [2021-06-14 09:24:40,289 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:40,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:40,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1491839177, now seen corresponding path program 1 times [2021-06-14 09:24:40,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:40,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204275352] [2021-06-14 09:24:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:24:40,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:40,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204275352] [2021-06-14 09:24:40,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204275352] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:40,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:40,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:40,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737449535] [2021-06-14 09:24:40,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:40,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:40,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:40,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:40,310 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:40,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:40,311 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:40,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:40,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2021-06-14 09:24:40,352 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:40,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:40,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1006176760, now seen corresponding path program 1 times [2021-06-14 09:24:40,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:40,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901975895] [2021-06-14 09:24:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:24:40,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:40,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901975895] [2021-06-14 09:24:40,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901975895] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:40,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:40,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:40,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540727331] [2021-06-14 09:24:40,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:40,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:40,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:40,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:40,377 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:40,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:40,377 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:40,377 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:40,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2021-06-14 09:24:40,439 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:40,439 INFO L82 PathProgramCache]: Analyzing trace with hash -801277703, now seen corresponding path program 1 times [2021-06-14 09:24:40,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:40,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135539276] [2021-06-14 09:24:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:40,442 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:40,444 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:40,445 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:40,445 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:40,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2021-06-14 09:24:40,446 INFO L301 ceAbstractionStarter]: Result for error location fooThread10of15ForFork0 was UNSAFE (10/17) [2021-06-14 09:24:40,446 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:40,454 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:40,454 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:40,454 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:40,454 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:40,454 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:40,454 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:40,454 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:40,454 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread14of15ForFork0======== Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:40,924 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:40,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2105703551, now seen corresponding path program 1 times [2021-06-14 09:24:40,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:40,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828541636] [2021-06-14 09:24:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:24:40,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:40,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828541636] [2021-06-14 09:24:40,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828541636] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:40,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:40,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:40,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381882214] [2021-06-14 09:24:40,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:40,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:40,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:40,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:40,940 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:40,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:40,940 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:41,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:41,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2021-06-14 09:24:41,025 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:41,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:41,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1344791874, now seen corresponding path program 1 times [2021-06-14 09:24:41,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:41,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783290973] [2021-06-14 09:24:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:24:41,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:41,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783290973] [2021-06-14 09:24:41,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783290973] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:41,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:41,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:41,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679090491] [2021-06-14 09:24:41,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:41,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:41,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:41,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:41,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:41,042 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:41,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:41,042 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:41,042 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:41,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2021-06-14 09:24:41,131 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:41,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:41,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1596865725, now seen corresponding path program 1 times [2021-06-14 09:24:41,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:41,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020799292] [2021-06-14 09:24:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:41,134 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:41,136 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:41,138 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:41,138 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:41,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2021-06-14 09:24:41,139 INFO L301 ceAbstractionStarter]: Result for error location fooThread14of15ForFork0 was UNSAFE (11/17) [2021-06-14 09:24:41,139 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:41,142 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:41,143 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:41,143 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:41,143 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:41,143 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:41,143 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:41,143 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:41,143 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of15ForFork0======== [2021-06-14 09:24:41,487 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:41,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:41,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1731016870, now seen corresponding path program 1 times [2021-06-14 09:24:41,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:41,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173653214] [2021-06-14 09:24:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:24:41,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:41,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173653214] [2021-06-14 09:24:41,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173653214] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:41,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:41,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:41,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960085751] [2021-06-14 09:24:41,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:41,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:41,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:41,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:41,496 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:41,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:41,496 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:41,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2021-06-14 09:24:41,532 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:41,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:41,532 INFO L82 PathProgramCache]: Analyzing trace with hash 766999067, now seen corresponding path program 1 times [2021-06-14 09:24:41,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:41,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000845220] [2021-06-14 09:24:41,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:24:41,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:41,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000845220] [2021-06-14 09:24:41,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000845220] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:41,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:41,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:41,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975546890] [2021-06-14 09:24:41,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:41,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:41,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:41,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:41,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:41,544 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:41,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:41,544 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:41,544 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:41,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2021-06-14 09:24:41,591 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:41,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:41,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1040455396, now seen corresponding path program 1 times [2021-06-14 09:24:41,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:41,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799262667] [2021-06-14 09:24:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:41,594 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:41,595 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:41,596 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:41,596 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:41,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2021-06-14 09:24:41,597 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of15ForFork0 was UNSAFE (12/17) [2021-06-14 09:24:41,597 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:41,604 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:41,604 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:41,604 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:41,605 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:41,605 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:41,605 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:41,605 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:41,605 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:24:41,916 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:41,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1229077258, now seen corresponding path program 1 times [2021-06-14 09:24:41,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:41,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633497528] [2021-06-14 09:24:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:41,919 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:41,920 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:41,922 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:41,922 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:41,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2021-06-14 09:24:41,922 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (13/17) [2021-06-14 09:24:41,922 WARN L243 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:41,922 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2021-06-14 09:24:41,944 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:41,944 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:41,950 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:41,950 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:41,950 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:41,950 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:41,951 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:41,951 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:41,951 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:41,951 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of16ForFork0======== [2021-06-14 09:24:42,298 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:42,299 INFO L82 PathProgramCache]: Analyzing trace with hash -428673965, now seen corresponding path program 1 times [2021-06-14 09:24:42,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:42,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743788359] [2021-06-14 09:24:42,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:42,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:42,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743788359] [2021-06-14 09:24:42,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743788359] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:42,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:42,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:42,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687053893] [2021-06-14 09:24:42,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:42,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:42,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:42,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:42,307 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:42,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:42,307 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:42,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2021-06-14 09:24:42,326 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:42,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:42,326 INFO L82 PathProgramCache]: Analyzing trace with hash -403988797, now seen corresponding path program 1 times [2021-06-14 09:24:42,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:42,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713875465] [2021-06-14 09:24:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:42,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:42,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713875465] [2021-06-14 09:24:42,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713875465] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:42,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:42,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:42,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5040253] [2021-06-14 09:24:42,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:42,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:42,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:42,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:42,347 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:42,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:42,347 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:42,347 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:42,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:42,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:42,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2021-06-14 09:24:42,607 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:42,607 INFO L82 PathProgramCache]: Analyzing trace with hash -972132213, now seen corresponding path program 1 times [2021-06-14 09:24:42,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:42,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756420345] [2021-06-14 09:24:42,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:42,609 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:42,610 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:42,611 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:42,611 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:42,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2021-06-14 09:24:42,611 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of16ForFork0 was UNSAFE (1/18) [2021-06-14 09:24:42,612 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:42,615 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:42,615 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:42,615 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:42,615 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:42,615 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:42,615 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:42,615 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:42,615 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of16ForFork0======== [2021-06-14 09:24:42,965 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:42,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:42,965 INFO L82 PathProgramCache]: Analyzing trace with hash 959803456, now seen corresponding path program 1 times [2021-06-14 09:24:42,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:42,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19505219] [2021-06-14 09:24:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:42,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:42,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19505219] [2021-06-14 09:24:42,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19505219] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:42,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:42,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:42,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426671215] [2021-06-14 09:24:42,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:42,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:42,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:42,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:42,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:42,974 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:42,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:42,974 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:42,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2021-06-14 09:24:42,987 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:42,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:42,987 INFO L82 PathProgramCache]: Analyzing trace with hash 959804417, now seen corresponding path program 1 times [2021-06-14 09:24:42,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:42,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486629376] [2021-06-14 09:24:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:42,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:42,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486629376] [2021-06-14 09:24:42,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486629376] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:42,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:42,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:42,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406494153] [2021-06-14 09:24:42,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:42,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:42,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:42,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:42,998 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:42,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:42,998 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:42,998 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:43,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:43,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:43,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2021-06-14 09:24:43,045 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:43,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:43,046 INFO L82 PathProgramCache]: Analyzing trace with hash -310832035, now seen corresponding path program 1 times [2021-06-14 09:24:43,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:43,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709459913] [2021-06-14 09:24:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:43,048 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:43,049 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:43,050 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:43,050 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:43,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258 [2021-06-14 09:24:43,050 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of16ForFork0 was UNSAFE (2/18) [2021-06-14 09:24:43,051 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:43,065 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:43,066 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:43,066 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:43,066 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:43,066 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:43,066 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:43,066 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:43,066 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:43,454 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (3/18) [2021-06-14 09:24:43,454 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:43,458 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:43,458 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:43,458 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:43,458 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:43,458 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:43,458 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:43,458 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:43,458 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread16of16ForFork0======== [2021-06-14 09:24:43,900 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:43,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:43,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1710420952, now seen corresponding path program 1 times [2021-06-14 09:24:43,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:43,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740617606] [2021-06-14 09:24:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:24:43,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:43,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740617606] [2021-06-14 09:24:43,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740617606] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:43,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:43,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:43,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066816553] [2021-06-14 09:24:43,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:43,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:43,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:43,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:43,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:43,914 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:43,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:43,914 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:43,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259 [2021-06-14 09:24:43,970 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:43,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1711344473, now seen corresponding path program 1 times [2021-06-14 09:24:43,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:43,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243197808] [2021-06-14 09:24:43,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:24:43,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:43,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243197808] [2021-06-14 09:24:43,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243197808] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:43,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:43,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:43,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185209395] [2021-06-14 09:24:43,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:43,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:43,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:43,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:43,986 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:43,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:43,986 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:43,986 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:44,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260 [2021-06-14 09:24:44,047 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:44,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:44,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1711345434, now seen corresponding path program 1 times [2021-06-14 09:24:44,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:44,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748425003] [2021-06-14 09:24:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:44,051 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:44,053 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:44,055 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:44,055 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:44,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261 [2021-06-14 09:24:44,056 INFO L301 ceAbstractionStarter]: Result for error location fooThread16of16ForFork0 was UNSAFE (4/18) [2021-06-14 09:24:44,056 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:44,089 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:44,090 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:44,090 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:44,090 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:44,090 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:44,090 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:44,090 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:44,090 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of16ForFork0======== Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:44,555 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:44,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:44,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1234332853, now seen corresponding path program 1 times [2021-06-14 09:24:44,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:44,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252333559] [2021-06-14 09:24:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:24:44,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:44,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252333559] [2021-06-14 09:24:44,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252333559] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:44,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:44,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:44,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853998321] [2021-06-14 09:24:44,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:44,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:44,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:44,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:44,564 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:44,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:44,564 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:44,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2021-06-14 09:24:44,587 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:44,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:44,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1233409332, now seen corresponding path program 1 times [2021-06-14 09:24:44,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:44,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798047382] [2021-06-14 09:24:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:24:44,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:44,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798047382] [2021-06-14 09:24:44,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798047382] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:44,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:44,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:44,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863718088] [2021-06-14 09:24:44,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:44,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:44,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:44,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:44,600 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:44,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:44,600 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:44,600 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:44,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2021-06-14 09:24:44,627 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:44,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:44,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1233408371, now seen corresponding path program 1 times [2021-06-14 09:24:44,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:44,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933389211] [2021-06-14 09:24:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:44,629 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:44,630 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:44,631 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:44,631 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:44,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2021-06-14 09:24:44,631 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of16ForFork0 was UNSAFE (5/18) [2021-06-14 09:24:44,631 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:44,636 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:44,636 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:44,636 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:44,636 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:44,636 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:44,636 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:44,636 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:44,636 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of16ForFork0======== [2021-06-14 09:24:45,076 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:45,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1666932590, now seen corresponding path program 1 times [2021-06-14 09:24:45,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:45,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94191808] [2021-06-14 09:24:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:24:45,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:45,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94191808] [2021-06-14 09:24:45,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94191808] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:45,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:45,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:45,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083907996] [2021-06-14 09:24:45,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:45,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:45,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:45,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:45,085 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:45,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:45,085 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:45,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265 [2021-06-14 09:24:45,108 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:45,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1667856111, now seen corresponding path program 1 times [2021-06-14 09:24:45,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:45,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178487397] [2021-06-14 09:24:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:24:45,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:45,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178487397] [2021-06-14 09:24:45,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178487397] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:45,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:45,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:45,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523790527] [2021-06-14 09:24:45,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:45,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:45,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:45,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:45,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:45,119 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:45,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:45,119 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:45,119 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:45,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:45,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266 [2021-06-14 09:24:45,140 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:45,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:45,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1667857072, now seen corresponding path program 1 times [2021-06-14 09:24:45,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:45,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375251296] [2021-06-14 09:24:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:45,142 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:45,142 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:45,143 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:45,143 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:45,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267 [2021-06-14 09:24:45,144 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of16ForFork0 was UNSAFE (6/18) [2021-06-14 09:24:45,144 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:45,149 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:45,149 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:45,149 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:45,149 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:45,149 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:45,149 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:45,149 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:45,149 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of16ForFork0======== [2021-06-14 09:24:45,516 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:45,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:45,516 INFO L82 PathProgramCache]: Analyzing trace with hash -260124707, now seen corresponding path program 1 times [2021-06-14 09:24:45,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:45,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613317755] [2021-06-14 09:24:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:45,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:45,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613317755] [2021-06-14 09:24:45,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613317755] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:45,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:45,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:45,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57308406] [2021-06-14 09:24:45,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:45,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:45,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:45,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:45,524 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:45,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:45,524 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:45,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268 [2021-06-14 09:24:45,547 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:45,548 INFO L82 PathProgramCache]: Analyzing trace with hash 627378974, now seen corresponding path program 1 times [2021-06-14 09:24:45,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:45,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188484765] [2021-06-14 09:24:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:45,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:45,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188484765] [2021-06-14 09:24:45,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188484765] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:45,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:45,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:45,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134571950] [2021-06-14 09:24:45,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:45,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:45,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:45,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:45,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:45,559 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:45,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:45,559 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:45,559 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:45,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269 [2021-06-14 09:24:45,588 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:45,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:45,588 INFO L82 PathProgramCache]: Analyzing trace with hash 628302495, now seen corresponding path program 1 times [2021-06-14 09:24:45,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:45,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606206096] [2021-06-14 09:24:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:45,590 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:45,591 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:45,592 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:45,592 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:45,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2021-06-14 09:24:45,593 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of16ForFork0 was UNSAFE (7/18) [2021-06-14 09:24:45,593 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:45,606 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:45,606 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:45,606 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:45,606 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:45,606 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:45,607 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:45,607 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:45,607 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread10of16ForFork0======== [2021-06-14 09:24:46,012 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:46,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:46,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1646441620, now seen corresponding path program 1 times [2021-06-14 09:24:46,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:46,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961909895] [2021-06-14 09:24:46,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:24:46,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:46,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961909895] [2021-06-14 09:24:46,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961909895] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:46,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:46,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:46,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122609464] [2021-06-14 09:24:46,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:46,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:46,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:46,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:46,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:46,022 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:46,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:46,022 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:46,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:46,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2021-06-14 09:24:46,064 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:46,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:46,064 INFO L82 PathProgramCache]: Analyzing trace with hash -150509739, now seen corresponding path program 1 times [2021-06-14 09:24:46,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:46,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281898808] [2021-06-14 09:24:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:24:46,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:46,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281898808] [2021-06-14 09:24:46,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281898808] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:46,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:46,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:46,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992350180] [2021-06-14 09:24:46,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:46,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:46,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:46,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:46,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:46,087 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:46,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:46,087 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:46,087 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:46,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2021-06-14 09:24:46,140 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:46,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:46,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1957964202, now seen corresponding path program 1 times [2021-06-14 09:24:46,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:46,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769393029] [2021-06-14 09:24:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:46,142 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:46,144 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:46,145 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:46,145 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:46,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273 [2021-06-14 09:24:46,146 INFO L301 ceAbstractionStarter]: Result for error location fooThread10of16ForFork0 was UNSAFE (8/18) [2021-06-14 09:24:46,146 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:46,189 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:46,189 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:46,189 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:46,189 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:46,189 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:46,189 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:46,189 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:46,189 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread11of16ForFork0======== Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:46,603 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:46,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:46,604 INFO L82 PathProgramCache]: Analyzing trace with hash -287276727, now seen corresponding path program 1 times [2021-06-14 09:24:46,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:46,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057562090] [2021-06-14 09:24:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:24:46,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:46,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057562090] [2021-06-14 09:24:46,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057562090] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:46,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:46,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:46,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423458692] [2021-06-14 09:24:46,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:46,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:46,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:46,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:46,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:46,613 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:46,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:46,614 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:46,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2021-06-14 09:24:46,662 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:46,662 INFO L82 PathProgramCache]: Analyzing trace with hash -580679734, now seen corresponding path program 1 times [2021-06-14 09:24:46,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:46,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042564122] [2021-06-14 09:24:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:24:46,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:46,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042564122] [2021-06-14 09:24:46,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042564122] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:46,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:46,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:46,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841326178] [2021-06-14 09:24:46,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:46,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:46,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:46,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:46,675 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:46,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:46,675 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:46,675 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:46,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:46,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:46,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275 [2021-06-14 09:24:46,736 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:46,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:46,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1917336203, now seen corresponding path program 1 times [2021-06-14 09:24:46,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:46,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036455482] [2021-06-14 09:24:46,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:46,738 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:46,739 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:46,741 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:46,741 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:46,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276 [2021-06-14 09:24:46,741 INFO L301 ceAbstractionStarter]: Result for error location fooThread11of16ForFork0 was UNSAFE (9/18) [2021-06-14 09:24:46,742 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:46,746 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:46,746 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:46,746 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:46,746 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:46,746 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:46,746 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:46,746 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:46,746 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread12of16ForFork0======== [2021-06-14 09:24:47,294 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:47,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1787452671, now seen corresponding path program 1 times [2021-06-14 09:24:47,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:47,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925852700] [2021-06-14 09:24:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:24:47,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:47,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925852700] [2021-06-14 09:24:47,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925852700] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:47,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:47,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:47,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940502437] [2021-06-14 09:24:47,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:47,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:47,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:47,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:47,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:47,305 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:47,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:47,305 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:47,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277 [2021-06-14 09:24:47,363 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:47,363 INFO L82 PathProgramCache]: Analyzing trace with hash -999962816, now seen corresponding path program 1 times [2021-06-14 09:24:47,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:47,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809471074] [2021-06-14 09:24:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:24:47,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:47,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809471074] [2021-06-14 09:24:47,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809471074] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:47,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:47,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:47,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751717494] [2021-06-14 09:24:47,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:47,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:47,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:47,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:47,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:47,377 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:47,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:47,377 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:47,377 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:47,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:47,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278 [2021-06-14 09:24:47,472 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:47,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:47,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1293365823, now seen corresponding path program 1 times [2021-06-14 09:24:47,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:47,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383520978] [2021-06-14 09:24:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:47,475 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:47,477 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:47,478 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:47,478 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:47,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279 [2021-06-14 09:24:47,479 INFO L301 ceAbstractionStarter]: Result for error location fooThread12of16ForFork0 was UNSAFE (10/18) [2021-06-14 09:24:47,479 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:47,484 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:47,484 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:47,484 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:47,484 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:47,484 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:47,484 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:47,484 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:47,484 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:24:47,851 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:47,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:47,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1963280792, now seen corresponding path program 1 times [2021-06-14 09:24:47,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:47,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710409039] [2021-06-14 09:24:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:47,854 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:47,855 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:47,856 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:47,856 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:47,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280 [2021-06-14 09:24:47,857 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (11/18) [2021-06-14 09:24:47,857 WARN L243 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:47,857 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2021-06-14 09:24:47,872 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:47,873 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:47,876 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:47,876 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:47,876 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:47,876 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:47,876 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:47,876 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:47,876 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:47,876 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of17ForFork0======== [2021-06-14 09:24:48,253 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:48,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:48,254 INFO L82 PathProgramCache]: Analyzing trace with hash -886815994, now seen corresponding path program 1 times [2021-06-14 09:24:48,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:48,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914291268] [2021-06-14 09:24:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:48,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:48,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914291268] [2021-06-14 09:24:48,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914291268] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:48,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:48,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:48,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529813059] [2021-06-14 09:24:48,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:48,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:48,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:48,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:48,262 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:48,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:48,262 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:48,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:48,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281 [2021-06-14 09:24:48,361 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:48,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:48,361 INFO L82 PathProgramCache]: Analyzing trace with hash -640350213, now seen corresponding path program 1 times [2021-06-14 09:24:48,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:48,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411129451] [2021-06-14 09:24:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:48,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:48,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411129451] [2021-06-14 09:24:48,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411129451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:48,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548602971] [2021-06-14 09:24:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:24:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:48,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:24:48,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:24:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:24:48,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548602971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:24:48,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:24:48,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:24:48,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495731915] [2021-06-14 09:24:48,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:48,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:48,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:48,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:48,468 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:48,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:48,469 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:48,469 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:48,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-14 09:24:48,769 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:48,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:48,770 INFO L82 PathProgramCache]: Analyzing trace with hash 171390383, now seen corresponding path program 1 times [2021-06-14 09:24:48,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:48,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58593270] [2021-06-14 09:24:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:48,772 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:48,772 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:48,773 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:48,773 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:48,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283 [2021-06-14 09:24:48,773 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of17ForFork0 was UNSAFE (1/19) [2021-06-14 09:24:48,774 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:48,777 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:48,777 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:48,777 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:48,777 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:48,777 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:48,777 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:48,777 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:48,777 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread17of17ForFork0======== [2021-06-14 09:24:49,226 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:49,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:49,226 INFO L82 PathProgramCache]: Analyzing trace with hash 714595631, now seen corresponding path program 1 times [2021-06-14 09:24:49,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:49,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417471696] [2021-06-14 09:24:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-06-14 09:24:49,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:49,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417471696] [2021-06-14 09:24:49,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417471696] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:49,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:49,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:49,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334729089] [2021-06-14 09:24:49,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:49,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:49,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:49,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:49,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:49,240 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:49,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:49,240 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:49,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284 [2021-06-14 09:24:49,291 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:49,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:49,291 INFO L82 PathProgramCache]: Analyzing trace with hash 714596592, now seen corresponding path program 1 times [2021-06-14 09:24:49,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:49,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367876861] [2021-06-14 09:24:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-06-14 09:24:49,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:49,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367876861] [2021-06-14 09:24:49,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367876861] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:49,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:49,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:49,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341417386] [2021-06-14 09:24:49,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:49,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:49,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:49,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:49,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:49,304 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:49,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:49,304 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:49,305 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:49,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:49,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:49,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285 [2021-06-14 09:24:49,386 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:49,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:49,387 INFO L82 PathProgramCache]: Analyzing trace with hash 677658832, now seen corresponding path program 1 times [2021-06-14 09:24:49,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:49,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097121694] [2021-06-14 09:24:49,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:49,389 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:49,391 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:49,392 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:49,392 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:49,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286 [2021-06-14 09:24:49,393 INFO L301 ceAbstractionStarter]: Result for error location fooThread17of17ForFork0 was UNSAFE (2/19) [2021-06-14 09:24:49,393 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:49,397 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:49,397 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:49,397 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:49,397 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:49,397 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:49,397 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:49,397 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:49,397 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of17ForFork0======== [2021-06-14 09:24:49,873 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:49,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1363617334, now seen corresponding path program 1 times [2021-06-14 09:24:49,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:49,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359786547] [2021-06-14 09:24:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:49,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:49,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359786547] [2021-06-14 09:24:49,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359786547] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:49,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:49,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:49,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270813700] [2021-06-14 09:24:49,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:49,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:49,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:49,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:49,881 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:49,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:49,881 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:49,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287 [2021-06-14 09:24:49,901 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:49,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1363618295, now seen corresponding path program 1 times [2021-06-14 09:24:49,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:49,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624802568] [2021-06-14 09:24:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:24:49,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:49,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624802568] [2021-06-14 09:24:49,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624802568] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:49,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:49,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:49,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902714972] [2021-06-14 09:24:49,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:49,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:49,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:49,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:49,912 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:49,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:49,912 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:49,912 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:50,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288 [2021-06-14 09:24:50,039 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:50,039 INFO L82 PathProgramCache]: Analyzing trace with hash 395719003, now seen corresponding path program 1 times [2021-06-14 09:24:50,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:50,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917443659] [2021-06-14 09:24:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:50,041 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:50,042 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:50,042 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:50,043 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:50,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289 [2021-06-14 09:24:50,043 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of17ForFork0 was UNSAFE (3/19) [2021-06-14 09:24:50,043 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:50,048 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:50,048 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:50,048 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:50,048 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:50,048 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:50,048 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:50,048 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:50,048 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread16of17ForFork0======== [2021-06-14 09:24:50,501 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:50,501 INFO L82 PathProgramCache]: Analyzing trace with hash 185285746, now seen corresponding path program 1 times [2021-06-14 09:24:50,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:50,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716945143] [2021-06-14 09:24:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:24:50,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:50,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716945143] [2021-06-14 09:24:50,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716945143] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:50,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:50,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:50,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640392490] [2021-06-14 09:24:50,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:50,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:50,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:50,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:50,513 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:50,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:50,513 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:50,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290 [2021-06-14 09:24:50,566 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:50,566 INFO L82 PathProgramCache]: Analyzing trace with hash 186209267, now seen corresponding path program 1 times [2021-06-14 09:24:50,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:50,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265895613] [2021-06-14 09:24:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:24:50,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:50,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265895613] [2021-06-14 09:24:50,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265895613] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:50,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:50,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:50,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127552703] [2021-06-14 09:24:50,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:50,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:50,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:50,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:50,580 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:50,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:50,580 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:50,580 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:50,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:50,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:50,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291 [2021-06-14 09:24:50,648 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:50,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:50,648 INFO L82 PathProgramCache]: Analyzing trace with hash 186210228, now seen corresponding path program 1 times [2021-06-14 09:24:50,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:50,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9077763] [2021-06-14 09:24:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:50,651 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:50,653 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:50,654 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:50,654 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:50,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292 [2021-06-14 09:24:50,655 INFO L301 ceAbstractionStarter]: Result for error location fooThread16of17ForFork0 was UNSAFE (4/19) [2021-06-14 09:24:50,655 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:50,659 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:50,659 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:50,659 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:50,659 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:50,659 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:50,659 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:50,659 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:50,659 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread15of17ForFork0======== [2021-06-14 09:24:51,100 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:51,100 INFO L82 PathProgramCache]: Analyzing trace with hash -830438923, now seen corresponding path program 1 times [2021-06-14 09:24:51,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:51,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316489979] [2021-06-14 09:24:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-06-14 09:24:51,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:51,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316489979] [2021-06-14 09:24:51,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316489979] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:51,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:51,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:51,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603678080] [2021-06-14 09:24:51,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:51,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:51,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:51,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:51,111 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:51,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:51,111 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:51,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:51,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293 [2021-06-14 09:24:51,159 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:51,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:51,159 INFO L82 PathProgramCache]: Analyzing trace with hash -829515402, now seen corresponding path program 1 times [2021-06-14 09:24:51,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:51,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72484060] [2021-06-14 09:24:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-06-14 09:24:51,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:51,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72484060] [2021-06-14 09:24:51,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72484060] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:51,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:51,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:51,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037237292] [2021-06-14 09:24:51,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:51,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:51,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:51,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:51,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:51,171 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:51,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:51,172 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:51,172 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:51,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:51,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294 [2021-06-14 09:24:51,232 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:51,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:51,232 INFO L82 PathProgramCache]: Analyzing trace with hash -829514441, now seen corresponding path program 1 times [2021-06-14 09:24:51,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:51,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631345382] [2021-06-14 09:24:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:51,235 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:51,236 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:51,237 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:51,237 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:51,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295 [2021-06-14 09:24:51,238 INFO L301 ceAbstractionStarter]: Result for error location fooThread15of17ForFork0 was UNSAFE (5/19) [2021-06-14 09:24:51,238 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:51,245 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:51,245 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:51,245 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:51,245 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:51,245 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:51,245 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:51,245 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:51,245 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:24:51,665 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (6/19) [2021-06-14 09:24:51,666 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:51,670 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:51,670 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:51,670 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:51,670 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:51,670 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:51,670 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:51,670 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:51,670 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of17ForFork0======== [2021-06-14 09:24:52,181 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash -346482166, now seen corresponding path program 1 times [2021-06-14 09:24:52,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:52,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683230288] [2021-06-14 09:24:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:52,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:52,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683230288] [2021-06-14 09:24:52,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683230288] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:52,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:52,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:52,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621501944] [2021-06-14 09:24:52,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:52,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:52,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:52,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:52,193 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:52,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:52,193 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:52,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:52,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296 [2021-06-14 09:24:52,214 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:52,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:52,214 INFO L82 PathProgramCache]: Analyzing trace with hash -345558645, now seen corresponding path program 1 times [2021-06-14 09:24:52,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:52,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118346944] [2021-06-14 09:24:52,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:24:52,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:52,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118346944] [2021-06-14 09:24:52,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118346944] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:52,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:52,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:52,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381146919] [2021-06-14 09:24:52,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:52,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:52,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:52,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:52,226 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:52,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:52,226 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:52,226 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:52,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:52,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297 [2021-06-14 09:24:52,251 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:52,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:52,251 INFO L82 PathProgramCache]: Analyzing trace with hash -345557684, now seen corresponding path program 1 times [2021-06-14 09:24:52,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:52,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448286541] [2021-06-14 09:24:52,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:52,253 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:52,254 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:52,255 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:52,255 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:52,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298 [2021-06-14 09:24:52,256 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of17ForFork0 was UNSAFE (7/19) [2021-06-14 09:24:52,256 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:24:52,277 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:52,278 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:52,278 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:52,278 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:52,278 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:52,278 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:52,278 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:52,278 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of17ForFork0======== Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:52,768 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:52,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:52,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1999712600, now seen corresponding path program 1 times [2021-06-14 09:24:52,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:52,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876482086] [2021-06-14 09:24:52,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:24:52,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:52,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876482086] [2021-06-14 09:24:52,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876482086] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:52,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:52,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:52,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027768964] [2021-06-14 09:24:52,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:52,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:52,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:52,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:52,777 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:52,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:52,777 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:52,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:52,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299 [2021-06-14 09:24:52,796 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:52,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:52,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2000636121, now seen corresponding path program 1 times [2021-06-14 09:24:52,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:52,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967219795] [2021-06-14 09:24:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:24:52,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:52,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967219795] [2021-06-14 09:24:52,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967219795] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:52,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:52,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:52,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111758272] [2021-06-14 09:24:52,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:52,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:52,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:52,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:52,812 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:52,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:52,812 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:52,812 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:52,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300 [2021-06-14 09:24:52,833 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:52,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:52,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2000637082, now seen corresponding path program 1 times [2021-06-14 09:24:52,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:52,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124514384] [2021-06-14 09:24:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:52,837 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:52,837 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:52,838 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:52,838 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:52,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301 [2021-06-14 09:24:52,839 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of17ForFork0 was UNSAFE (8/19) [2021-06-14 09:24:52,839 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:52,849 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:52,849 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:52,849 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:52,849 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:52,849 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:52,849 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:52,849 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:52,849 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of17ForFork0======== [2021-06-14 09:24:53,246 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:53,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:53,246 INFO L82 PathProgramCache]: Analyzing trace with hash -989667481, now seen corresponding path program 1 times [2021-06-14 09:24:53,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:53,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408022395] [2021-06-14 09:24:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:53,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:53,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408022395] [2021-06-14 09:24:53,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408022395] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:53,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:53,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:53,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413005090] [2021-06-14 09:24:53,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:53,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:53,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:53,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:53,256 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:53,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:53,256 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:53,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302 [2021-06-14 09:24:53,280 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:53,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:53,280 INFO L82 PathProgramCache]: Analyzing trace with hash -988743960, now seen corresponding path program 1 times [2021-06-14 09:24:53,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:53,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942267566] [2021-06-14 09:24:53,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:24:53,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:53,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942267566] [2021-06-14 09:24:53,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942267566] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:53,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:53,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:53,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411708826] [2021-06-14 09:24:53,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:53,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:53,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:53,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:53,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:53,291 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:53,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:53,292 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:53,292 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:53,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2021-06-14 09:24:53,309 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:53,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:53,310 INFO L82 PathProgramCache]: Analyzing trace with hash -988742999, now seen corresponding path program 1 times [2021-06-14 09:24:53,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:53,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704870267] [2021-06-14 09:24:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:53,311 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:53,312 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:53,313 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:53,313 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:53,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304 [2021-06-14 09:24:53,313 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of17ForFork0 was UNSAFE (9/19) [2021-06-14 09:24:53,313 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:53,323 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:53,323 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:53,323 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:53,323 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:53,323 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:53,323 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:53,323 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:53,323 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of17ForFork0======== [2021-06-14 09:24:53,761 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:53,762 INFO L82 PathProgramCache]: Analyzing trace with hash 486627369, now seen corresponding path program 1 times [2021-06-14 09:24:53,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:53,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844014555] [2021-06-14 09:24:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:24:53,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:53,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844014555] [2021-06-14 09:24:53,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844014555] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:53,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:53,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:53,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516001261] [2021-06-14 09:24:53,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:53,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:53,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:53,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:53,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:53,771 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:53,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:53,771 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:53,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305 [2021-06-14 09:24:53,809 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:53,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1310323990, now seen corresponding path program 1 times [2021-06-14 09:24:53,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:53,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123103083] [2021-06-14 09:24:53,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:24:53,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:53,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123103083] [2021-06-14 09:24:53,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123103083] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:53,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:53,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:53,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611455375] [2021-06-14 09:24:53,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:53,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:53,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:53,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:53,821 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:53,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:53,822 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:53,822 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:53,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:53,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306 [2021-06-14 09:24:53,868 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:53,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:53,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1177188843, now seen corresponding path program 1 times [2021-06-14 09:24:53,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:53,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024599973] [2021-06-14 09:24:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:53,870 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:53,871 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:53,873 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:53,873 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:53,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307 [2021-06-14 09:24:53,873 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of17ForFork0 was UNSAFE (10/19) [2021-06-14 09:24:53,874 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:53,881 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:53,881 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:53,881 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:53,882 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:53,882 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:53,882 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:53,882 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:53,882 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread10of17ForFork0======== [2021-06-14 09:24:54,335 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:54,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:54,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1987816937, now seen corresponding path program 1 times [2021-06-14 09:24:54,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:54,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263139566] [2021-06-14 09:24:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:24:54,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:54,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263139566] [2021-06-14 09:24:54,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263139566] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:54,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:54,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:54,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267686834] [2021-06-14 09:24:54,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:54,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:54,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:54,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:54,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:54,346 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:54,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:54,346 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:54,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308 [2021-06-14 09:24:54,395 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:54,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:54,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2013747352, now seen corresponding path program 1 times [2021-06-14 09:24:54,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:54,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527209896] [2021-06-14 09:24:54,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:24:54,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:54,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527209896] [2021-06-14 09:24:54,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527209896] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:54,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:54,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:54,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664535077] [2021-06-14 09:24:54,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:54,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:54,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:54,504 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:54,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:54,504 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:54,504 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:54,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309 [2021-06-14 09:24:54,561 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:54,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:54,561 INFO L82 PathProgramCache]: Analyzing trace with hash 216795993, now seen corresponding path program 1 times [2021-06-14 09:24:54,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:54,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217134949] [2021-06-14 09:24:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:54,564 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:54,565 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:54,566 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:54,566 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:54,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310 [2021-06-14 09:24:54,567 INFO L301 ceAbstractionStarter]: Result for error location fooThread10of17ForFork0 was UNSAFE (11/19) [2021-06-14 09:24:54,567 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:54,575 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:54,575 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:54,575 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:54,575 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:54,575 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:54,575 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:54,575 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:54,575 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread11of17ForFork0======== [2021-06-14 09:24:55,037 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:55,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1273896048, now seen corresponding path program 1 times [2021-06-14 09:24:55,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:55,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365108871] [2021-06-14 09:24:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:24:55,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:55,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365108871] [2021-06-14 09:24:55,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365108871] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:55,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:55,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:55,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012043303] [2021-06-14 09:24:55,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:55,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:55,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:55,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:55,047 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:55,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:55,047 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:55,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:55,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311 [2021-06-14 09:24:55,102 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:55,102 INFO L82 PathProgramCache]: Analyzing trace with hash 233655761, now seen corresponding path program 1 times [2021-06-14 09:24:55,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:55,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766260678] [2021-06-14 09:24:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:24:55,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:55,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766260678] [2021-06-14 09:24:55,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766260678] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:55,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:55,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:55,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449766460] [2021-06-14 09:24:55,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:55,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:55,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:55,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:55,118 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:55,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:55,118 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:55,119 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:55,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:55,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:55,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable312 [2021-06-14 09:24:55,186 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:55,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:55,186 INFO L82 PathProgramCache]: Analyzing trace with hash -59747246, now seen corresponding path program 1 times [2021-06-14 09:24:55,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:55,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752520475] [2021-06-14 09:24:55,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:55,188 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:55,190 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:55,191 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:55,191 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:55,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313 [2021-06-14 09:24:55,191 INFO L301 ceAbstractionStarter]: Result for error location fooThread11of17ForFork0 was UNSAFE (12/19) [2021-06-14 09:24:55,191 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:55,195 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:55,195 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:55,195 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:55,195 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:55,195 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:55,195 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:55,195 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:55,195 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread9of17ForFork0======== [2021-06-14 09:24:55,649 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash -108103968, now seen corresponding path program 1 times [2021-06-14 09:24:55,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:55,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540376735] [2021-06-14 09:24:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:24:55,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:55,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540376735] [2021-06-14 09:24:55,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540376735] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:55,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:55,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:55,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49333052] [2021-06-14 09:24:55,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:55,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:55,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:55,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:55,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:55,658 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:55,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:55,658 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:55,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:55,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314 [2021-06-14 09:24:55,703 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:55,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:55,703 INFO L82 PathProgramCache]: Analyzing trace with hash -401506975, now seen corresponding path program 1 times [2021-06-14 09:24:55,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:55,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981078036] [2021-06-14 09:24:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:24:55,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:55,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981078036] [2021-06-14 09:24:55,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981078036] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:55,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:55,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:55,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155811114] [2021-06-14 09:24:55,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:55,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:55,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:55,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:55,716 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:55,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:55,716 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:55,716 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:55,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:55,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:55,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315 [2021-06-14 09:24:55,770 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:55,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:55,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2096508962, now seen corresponding path program 1 times [2021-06-14 09:24:55,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:55,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697830674] [2021-06-14 09:24:55,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:55,773 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:55,774 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:55,776 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:55,776 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:55,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316 [2021-06-14 09:24:55,776 INFO L301 ceAbstractionStarter]: Result for error location fooThread9of17ForFork0 was UNSAFE (13/19) [2021-06-14 09:24:55,776 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:55,786 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:55,786 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:55,786 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:55,786 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:55,786 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:55,786 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:55,786 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:55,786 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread13of17ForFork0======== [2021-06-14 09:24:56,274 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:56,274 INFO L82 PathProgramCache]: Analyzing trace with hash 716936389, now seen corresponding path program 1 times [2021-06-14 09:24:56,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:56,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818705520] [2021-06-14 09:24:56,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:24:56,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:56,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818705520] [2021-06-14 09:24:56,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818705520] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:56,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:56,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:56,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323825184] [2021-06-14 09:24:56,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:56,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:56,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:56,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:56,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:56,284 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:56,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:56,285 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:56,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317 [2021-06-14 09:24:56,354 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:56,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:56,354 INFO L82 PathProgramCache]: Analyzing trace with hash -127535482, now seen corresponding path program 1 times [2021-06-14 09:24:56,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:56,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910785667] [2021-06-14 09:24:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:24:56,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:56,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910785667] [2021-06-14 09:24:56,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910785667] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:56,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:56,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:56,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567631510] [2021-06-14 09:24:56,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:56,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:56,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:56,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:56,367 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:56,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:56,367 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:56,367 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:56,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:56,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:56,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318 [2021-06-14 09:24:56,452 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:56,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:56,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1225774215, now seen corresponding path program 1 times [2021-06-14 09:24:56,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:56,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369355718] [2021-06-14 09:24:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:56,454 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:56,456 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:56,457 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:56,457 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:56,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319 [2021-06-14 09:24:56,458 INFO L301 ceAbstractionStarter]: Result for error location fooThread13of17ForFork0 was UNSAFE (14/19) [2021-06-14 09:24:56,458 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:56,465 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:56,465 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:56,465 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:56,465 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:56,465 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:56,465 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:56,465 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:56,465 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:24:56,981 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:24:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:56,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1558622260, now seen corresponding path program 1 times [2021-06-14 09:24:56,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:56,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062176901] [2021-06-14 09:24:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:56,985 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:56,987 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:56,988 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:56,988 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:56,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320 [2021-06-14 09:24:56,989 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (15/19) [2021-06-14 09:24:56,989 WARN L243 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:24:56,989 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2021-06-14 09:24:57,007 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:24:57,007 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:57,011 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:57,011 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:57,011 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:57,011 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:57,011 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:57,011 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:57,011 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:57,011 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread15of18ForFork0======== [2021-06-14 09:24:57,519 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:57,520 INFO L82 PathProgramCache]: Analyzing trace with hash 367902958, now seen corresponding path program 1 times [2021-06-14 09:24:57,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:57,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896653454] [2021-06-14 09:24:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-06-14 09:24:57,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:57,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896653454] [2021-06-14 09:24:57,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896653454] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:57,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:57,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:57,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998693278] [2021-06-14 09:24:57,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:57,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:57,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:57,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:57,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:57,540 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:57,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:57,540 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:57,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:57,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321 [2021-06-14 09:24:57,608 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:57,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1479909139, now seen corresponding path program 1 times [2021-06-14 09:24:57,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:57,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768255070] [2021-06-14 09:24:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-06-14 09:24:57,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:57,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768255070] [2021-06-14 09:24:57,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768255070] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:57,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:57,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:57,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472871828] [2021-06-14 09:24:57,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:57,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:57,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:57,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:57,624 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:57,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:57,624 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:57,624 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:57,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:57,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:57,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable322 [2021-06-14 09:24:57,722 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:57,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:57,723 INFO L82 PathProgramCache]: Analyzing trace with hash -558471801, now seen corresponding path program 1 times [2021-06-14 09:24:57,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:57,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8799397] [2021-06-14 09:24:57,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:57,726 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:57,728 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:57,730 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:57,730 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:57,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323 [2021-06-14 09:24:57,730 INFO L301 ceAbstractionStarter]: Result for error location fooThread15of18ForFork0 was UNSAFE (1/20) [2021-06-14 09:24:57,731 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:57,746 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:57,746 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:57,746 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:57,746 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:57,746 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:57,746 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:57,746 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:57,746 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread14of18ForFork0======== [2021-06-14 09:24:58,210 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:58,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2024282034, now seen corresponding path program 1 times [2021-06-14 09:24:58,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:58,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026578535] [2021-06-14 09:24:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:24:58,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:58,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026578535] [2021-06-14 09:24:58,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026578535] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:58,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:58,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:58,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59963536] [2021-06-14 09:24:58,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:58,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:58,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:58,220 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:58,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:58,220 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:58,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:58,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324 [2021-06-14 09:24:58,271 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:58,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:58,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1671767565, now seen corresponding path program 1 times [2021-06-14 09:24:58,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:58,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020330237] [2021-06-14 09:24:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:24:58,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:58,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020330237] [2021-06-14 09:24:58,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020330237] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:58,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:58,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:58,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229893089] [2021-06-14 09:24:58,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:58,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:58,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:58,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:58,285 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:58,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:58,285 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:58,285 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:58,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325 [2021-06-14 09:24:58,379 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:58,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:58,379 INFO L82 PathProgramCache]: Analyzing trace with hash 250901159, now seen corresponding path program 1 times [2021-06-14 09:24:58,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:58,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402339344] [2021-06-14 09:24:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:58,382 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:58,383 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:58,384 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:58,384 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:58,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326 [2021-06-14 09:24:58,385 INFO L301 ceAbstractionStarter]: Result for error location fooThread14of18ForFork0 was UNSAFE (2/20) [2021-06-14 09:24:58,385 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:58,388 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:58,388 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:58,388 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:58,388 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:58,389 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:58,389 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:58,389 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:58,389 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread16of18ForFork0======== [2021-06-14 09:24:58,879 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:58,879 INFO L82 PathProgramCache]: Analyzing trace with hash -603588975, now seen corresponding path program 1 times [2021-06-14 09:24:58,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:58,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384604772] [2021-06-14 09:24:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:24:58,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:58,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384604772] [2021-06-14 09:24:58,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384604772] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:58,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:58,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:58,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448859130] [2021-06-14 09:24:58,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:58,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:58,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:58,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:58,891 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:58,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:58,891 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:58,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:58,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327 [2021-06-14 09:24:58,940 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:58,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:58,941 INFO L82 PathProgramCache]: Analyzing trace with hash -602665454, now seen corresponding path program 1 times [2021-06-14 09:24:58,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:58,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173903463] [2021-06-14 09:24:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:24:58,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:58,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173903463] [2021-06-14 09:24:58,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173903463] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:58,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:58,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:24:58,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487985138] [2021-06-14 09:24:58,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:58,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:58,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:58,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:58,954 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:58,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:58,954 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:58,955 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:59,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328 [2021-06-14 09:24:59,018 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:59,018 INFO L82 PathProgramCache]: Analyzing trace with hash -602664493, now seen corresponding path program 1 times [2021-06-14 09:24:59,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:59,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056225403] [2021-06-14 09:24:59,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:59,021 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:59,022 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:59,024 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:59,024 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:59,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329 [2021-06-14 09:24:59,024 INFO L301 ceAbstractionStarter]: Result for error location fooThread16of18ForFork0 was UNSAFE (3/20) [2021-06-14 09:24:59,024 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:59,028 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:59,028 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:59,028 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:59,028 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:59,028 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:59,028 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:59,028 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:59,028 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread13of18ForFork0======== [2021-06-14 09:24:59,482 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:59,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1088310255, now seen corresponding path program 1 times [2021-06-14 09:24:59,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:59,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916391183] [2021-06-14 09:24:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:24:59,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:59,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916391183] [2021-06-14 09:24:59,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916391183] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:59,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:59,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:24:59,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787937108] [2021-06-14 09:24:59,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:24:59,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:59,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:24:59,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:24:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:59,491 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:59,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:59,491 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:59,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:59,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330 [2021-06-14 09:24:59,550 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash -622119276, now seen corresponding path program 1 times [2021-06-14 09:24:59,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:59,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574217259] [2021-06-14 09:24:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:24:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:24:59,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:24:59,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574217259] [2021-06-14 09:24:59,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574217259] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:24:59,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:24:59,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:24:59,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791538635] [2021-06-14 09:24:59,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:24:59,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:24:59,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:24:59,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:24:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:59,562 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:24:59,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:24:59,562 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:59,562 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:24:59,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:24:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:24:59,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331 [2021-06-14 09:24:59,752 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:24:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:24:59,752 INFO L82 PathProgramCache]: Analyzing trace with hash -856130062, now seen corresponding path program 1 times [2021-06-14 09:24:59,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:24:59,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222340251] [2021-06-14 09:24:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:24:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:59,754 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:24:59,756 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:24:59,757 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:24:59,757 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:24:59,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332 [2021-06-14 09:24:59,757 INFO L301 ceAbstractionStarter]: Result for error location fooThread13of18ForFork0 was UNSAFE (4/20) [2021-06-14 09:24:59,757 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:24:59,761 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:24:59,761 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:24:59,761 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:24:59,761 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:24:59,761 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:24:59,761 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:24:59,761 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:24:59,761 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread17of18ForFork0======== [2021-06-14 09:25:00,285 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:00,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:00,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1714753141, now seen corresponding path program 1 times [2021-06-14 09:25:00,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:00,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31094575] [2021-06-14 09:25:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-06-14 09:25:00,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:00,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31094575] [2021-06-14 09:25:00,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31094575] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:00,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:00,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:00,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063828658] [2021-06-14 09:25:00,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:00,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:00,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:00,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:00,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:00,304 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:00,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:00,304 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:00,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333 [2021-06-14 09:25:00,366 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:00,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:00,366 INFO L82 PathProgramCache]: Analyzing trace with hash -92701322, now seen corresponding path program 1 times [2021-06-14 09:25:00,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:00,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916459687] [2021-06-14 09:25:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-06-14 09:25:00,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:00,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916459687] [2021-06-14 09:25:00,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916459687] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:00,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:00,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:00,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073980755] [2021-06-14 09:25:00,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:00,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:00,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:00,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:00,380 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:00,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:00,381 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:00,381 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:00,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334 [2021-06-14 09:25:00,463 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:00,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:00,463 INFO L82 PathProgramCache]: Analyzing trace with hash 794802359, now seen corresponding path program 1 times [2021-06-14 09:25:00,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:00,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415161742] [2021-06-14 09:25:00,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:00,466 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:00,468 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:00,469 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:00,469 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:00,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335 [2021-06-14 09:25:00,470 INFO L301 ceAbstractionStarter]: Result for error location fooThread17of18ForFork0 was UNSAFE (5/20) [2021-06-14 09:25:00,470 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:00,485 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:00,486 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:00,486 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:00,486 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:00,486 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:00,486 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:00,486 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:00,486 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:25:00,956 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (6/20) [2021-06-14 09:25:00,956 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:00,960 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:00,960 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:00,960 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:00,960 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:00,960 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:00,960 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:00,960 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:00,960 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of18ForFork0======== [2021-06-14 09:25:01,400 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:01,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1027650736, now seen corresponding path program 1 times [2021-06-14 09:25:01,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:01,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6672781] [2021-06-14 09:25:01,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:25:01,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:01,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6672781] [2021-06-14 09:25:01,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6672781] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:01,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:01,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:01,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810061770] [2021-06-14 09:25:01,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:01,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:01,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:01,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:01,408 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:01,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:01,409 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:01,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:01,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336 [2021-06-14 09:25:01,434 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:01,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:01,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1792402815, now seen corresponding path program 1 times [2021-06-14 09:25:01,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:01,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267129042] [2021-06-14 09:25:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:25:01,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:01,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267129042] [2021-06-14 09:25:01,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267129042] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:01,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:01,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:01,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902823989] [2021-06-14 09:25:01,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:01,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:01,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:01,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:01,445 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:01,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:01,445 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:01,445 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:01,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337 [2021-06-14 09:25:01,480 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:01,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:01,480 INFO L82 PathProgramCache]: Analyzing trace with hash 217255961, now seen corresponding path program 1 times [2021-06-14 09:25:01,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:01,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157010767] [2021-06-14 09:25:01,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:01,482 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:01,483 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:01,484 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:01,484 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:01,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338 [2021-06-14 09:25:01,485 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of18ForFork0 was UNSAFE (7/20) [2021-06-14 09:25:01,485 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:01,494 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:01,494 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:01,494 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:01,494 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:01,494 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:01,494 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:01,494 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:01,494 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of18ForFork0======== [2021-06-14 09:25:01,927 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:01,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:01,927 INFO L82 PathProgramCache]: Analyzing trace with hash 340810953, now seen corresponding path program 1 times [2021-06-14 09:25:01,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:01,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141996872] [2021-06-14 09:25:01,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:01,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:01,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141996872] [2021-06-14 09:25:01,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141996872] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:01,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:01,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:01,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659955197] [2021-06-14 09:25:01,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:01,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:01,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:01,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:01,935 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:01,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:01,935 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:02,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339 [2021-06-14 09:25:02,047 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:02,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:02,047 INFO L82 PathProgramCache]: Analyzing trace with hash 615511747, now seen corresponding path program 1 times [2021-06-14 09:25:02,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:02,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040309770] [2021-06-14 09:25:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:02,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:02,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040309770] [2021-06-14 09:25:02,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040309770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:25:02,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293565578] [2021-06-14 09:25:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:25:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:02,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:25:02,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:25:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:02,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293565578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:25:02,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:25:02,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:25:02,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500595190] [2021-06-14 09:25:02,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:02,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:02,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:02,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:02,177 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:02,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:02,177 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:02,177 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:02,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:02,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:25:02,505 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:02,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:02,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1758232186, now seen corresponding path program 1 times [2021-06-14 09:25:02,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:02,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381452441] [2021-06-14 09:25:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:02,507 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:02,508 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:02,509 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:02,509 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:02,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341 [2021-06-14 09:25:02,509 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of18ForFork0 was UNSAFE (8/20) [2021-06-14 09:25:02,509 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:02,513 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:02,513 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:02,513 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:02,513 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:02,513 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:02,513 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:02,513 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:02,513 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread9of18ForFork0======== [2021-06-14 09:25:03,095 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:03,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:03,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1334158081, now seen corresponding path program 1 times [2021-06-14 09:25:03,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:03,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935779236] [2021-06-14 09:25:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:25:03,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:03,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935779236] [2021-06-14 09:25:03,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935779236] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:03,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:03,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:03,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773049512] [2021-06-14 09:25:03,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:03,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:03,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:03,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:03,105 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:03,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:03,105 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:03,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342 [2021-06-14 09:25:03,137 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:03,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:03,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1333234560, now seen corresponding path program 1 times [2021-06-14 09:25:03,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:03,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095360328] [2021-06-14 09:25:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:25:03,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:03,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095360328] [2021-06-14 09:25:03,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095360328] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:03,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:03,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:03,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355735541] [2021-06-14 09:25:03,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:03,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:03,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:03,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:03,165 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:03,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:03,165 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:03,165 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:03,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343 [2021-06-14 09:25:03,206 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:03,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:03,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1333233599, now seen corresponding path program 1 times [2021-06-14 09:25:03,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:03,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163789273] [2021-06-14 09:25:03,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:03,209 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:03,210 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:03,211 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:03,212 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:03,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344 [2021-06-14 09:25:03,212 INFO L301 ceAbstractionStarter]: Result for error location fooThread9of18ForFork0 was UNSAFE (9/20) [2021-06-14 09:25:03,212 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:03,230 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:03,231 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:03,231 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:03,231 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:03,231 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:03,231 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:03,231 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:03,231 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of18ForFork0======== [2021-06-14 09:25:03,683 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:03,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:03,683 INFO L82 PathProgramCache]: Analyzing trace with hash 956626493, now seen corresponding path program 1 times [2021-06-14 09:25:03,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:03,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169766211] [2021-06-14 09:25:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:25:03,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:03,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169766211] [2021-06-14 09:25:03,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169766211] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:03,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:03,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:03,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482230844] [2021-06-14 09:25:03,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:03,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:03,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:03,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:03,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:03,693 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:03,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:03,693 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:03,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable345 [2021-06-14 09:25:03,714 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:03,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:03,714 INFO L82 PathProgramCache]: Analyzing trace with hash 956627454, now seen corresponding path program 1 times [2021-06-14 09:25:03,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:03,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000034415] [2021-06-14 09:25:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:25:03,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:03,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000034415] [2021-06-14 09:25:03,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000034415] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:03,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:03,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:03,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15005590] [2021-06-14 09:25:03,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:03,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:03,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:03,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:03,725 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:03,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:03,725 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:03,725 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:03,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:03,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:03,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346 [2021-06-14 09:25:03,864 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:03,864 INFO L82 PathProgramCache]: Analyzing trace with hash -717064833, now seen corresponding path program 1 times [2021-06-14 09:25:03,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:03,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436684295] [2021-06-14 09:25:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:03,866 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:03,867 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:03,867 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:03,868 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:03,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347 [2021-06-14 09:25:03,868 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of18ForFork0 was UNSAFE (10/20) [2021-06-14 09:25:03,868 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:03,871 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:03,871 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:03,872 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:03,872 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:03,872 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:03,872 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:03,872 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:03,872 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread7of18ForFork0======== [2021-06-14 09:25:04,387 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:04,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:04,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1289820077, now seen corresponding path program 1 times [2021-06-14 09:25:04,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:04,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080370373] [2021-06-14 09:25:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:25:04,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:04,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080370373] [2021-06-14 09:25:04,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080370373] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:04,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:04,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:04,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644648498] [2021-06-14 09:25:04,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:04,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:04,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:04,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:04,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:04,398 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:04,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:04,398 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:04,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:04,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348 [2021-06-14 09:25:04,428 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:04,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:04,428 INFO L82 PathProgramCache]: Analyzing trace with hash -2117643538, now seen corresponding path program 1 times [2021-06-14 09:25:04,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:04,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695377137] [2021-06-14 09:25:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:25:04,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:04,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695377137] [2021-06-14 09:25:04,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695377137] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:04,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:04,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:04,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072518585] [2021-06-14 09:25:04,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:04,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:04,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:04,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:04,440 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:04,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:04,440 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:04,440 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:04,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349 [2021-06-14 09:25:04,476 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:04,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:04,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2116720017, now seen corresponding path program 1 times [2021-06-14 09:25:04,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:04,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990248117] [2021-06-14 09:25:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:04,478 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:04,479 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:04,480 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:04,480 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:04,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350 [2021-06-14 09:25:04,481 INFO L301 ceAbstractionStarter]: Result for error location fooThread7of18ForFork0 was UNSAFE (11/20) [2021-06-14 09:25:04,481 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:04,489 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:04,489 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:04,489 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:04,489 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:04,489 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:04,489 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:04,489 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:04,489 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of18ForFork0======== [2021-06-14 09:25:04,944 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:04,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:04,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1241814744, now seen corresponding path program 1 times [2021-06-14 09:25:04,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:04,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598200986] [2021-06-14 09:25:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:25:04,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:04,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598200986] [2021-06-14 09:25:04,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598200986] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:04,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:04,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:04,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933419961] [2021-06-14 09:25:04,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:04,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:04,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:04,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:04,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:04,963 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:04,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:04,963 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:04,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351 [2021-06-14 09:25:04,993 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:04,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:04,993 INFO L82 PathProgramCache]: Analyzing trace with hash -354311063, now seen corresponding path program 1 times [2021-06-14 09:25:04,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:04,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134458993] [2021-06-14 09:25:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:25:05,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:05,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134458993] [2021-06-14 09:25:05,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134458993] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:05,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:05,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:05,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981502303] [2021-06-14 09:25:05,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:05,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:05,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:05,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:05,006 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:05,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:05,006 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:05,006 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:05,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352 [2021-06-14 09:25:05,033 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:05,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:05,033 INFO L82 PathProgramCache]: Analyzing trace with hash -353387542, now seen corresponding path program 1 times [2021-06-14 09:25:05,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:05,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250104556] [2021-06-14 09:25:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:05,036 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:05,037 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:05,038 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:05,038 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:05,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353 [2021-06-14 09:25:05,038 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of18ForFork0 was UNSAFE (12/20) [2021-06-14 09:25:05,038 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:05,042 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:05,042 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:05,042 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:05,042 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:05,042 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:05,042 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:05,042 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:05,042 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of18ForFork0======== [2021-06-14 09:25:05,542 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:05,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:05,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1410942712, now seen corresponding path program 1 times [2021-06-14 09:25:05,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:05,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950563392] [2021-06-14 09:25:05,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:25:05,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:05,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950563392] [2021-06-14 09:25:05,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950563392] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:05,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:05,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:05,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877522389] [2021-06-14 09:25:05,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:05,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:05,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:05,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:05,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:05,553 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:05,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:05,553 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:05,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:05,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354 [2021-06-14 09:25:05,593 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:05,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1087073225, now seen corresponding path program 1 times [2021-06-14 09:25:05,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:05,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687452073] [2021-06-14 09:25:05,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:25:05,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:05,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687452073] [2021-06-14 09:25:05,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687452073] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:05,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:05,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:05,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403305267] [2021-06-14 09:25:05,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:05,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:05,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:05,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:05,709 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:05,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:05,709 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:05,709 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:05,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355 [2021-06-14 09:25:05,755 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:05,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:05,755 INFO L82 PathProgramCache]: Analyzing trace with hash -720381238, now seen corresponding path program 1 times [2021-06-14 09:25:05,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:05,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944706151] [2021-06-14 09:25:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:05,757 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:05,758 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:05,760 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:05,760 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:05,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356 [2021-06-14 09:25:05,760 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of18ForFork0 was UNSAFE (13/20) [2021-06-14 09:25:05,761 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:25:05,769 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:05,770 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:05,770 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:05,770 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:05,770 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:05,770 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:05,770 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:05,770 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread11of18ForFork0======== Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:06,324 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:06,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1146595099, now seen corresponding path program 1 times [2021-06-14 09:25:06,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:06,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358801634] [2021-06-14 09:25:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:25:06,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:06,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358801634] [2021-06-14 09:25:06,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358801634] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:06,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:06,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:06,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685189866] [2021-06-14 09:25:06,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:06,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:06,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:06,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:06,336 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:06,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:06,336 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:06,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357 [2021-06-14 09:25:06,393 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:06,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:06,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1640820388, now seen corresponding path program 1 times [2021-06-14 09:25:06,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:06,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002246775] [2021-06-14 09:25:06,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:25:06,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:06,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002246775] [2021-06-14 09:25:06,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002246775] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:06,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:06,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:06,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642525046] [2021-06-14 09:25:06,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:06,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:06,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:06,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:06,413 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:06,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:06,413 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:06,413 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:06,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358 [2021-06-14 09:25:06,481 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:06,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:06,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1934223395, now seen corresponding path program 1 times [2021-06-14 09:25:06,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:06,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888065744] [2021-06-14 09:25:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:06,484 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:06,485 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:06,487 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:06,487 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:06,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359 [2021-06-14 09:25:06,487 INFO L301 ceAbstractionStarter]: Result for error location fooThread11of18ForFork0 was UNSAFE (14/20) [2021-06-14 09:25:06,487 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:06,491 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:06,491 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:06,491 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:06,491 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:06,491 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:06,491 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:06,491 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:06,491 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:25:06,955 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:25:06,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:06,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1153834562, now seen corresponding path program 1 times [2021-06-14 09:25:06,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:06,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218317723] [2021-06-14 09:25:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:06,958 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:06,960 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:06,961 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:06,962 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:06,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360 [2021-06-14 09:25:06,962 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (15/20) [2021-06-14 09:25:06,962 WARN L243 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:25:06,962 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2021-06-14 09:25:06,980 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:25:06,981 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:25:06,994 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:06,994 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:06,994 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:06,994 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:06,994 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:06,994 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:06,994 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:06,994 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread13of19ForFork0======== Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:07,524 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:07,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1154549881, now seen corresponding path program 1 times [2021-06-14 09:25:07,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:07,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770127087] [2021-06-14 09:25:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:25:07,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:07,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770127087] [2021-06-14 09:25:07,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770127087] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:07,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:07,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:07,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149642217] [2021-06-14 09:25:07,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:07,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:07,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:07,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:07,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:07,536 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:07,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:07,537 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:07,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:07,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361 [2021-06-14 09:25:07,597 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:07,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1431306668, now seen corresponding path program 1 times [2021-06-14 09:25:07,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:07,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270379570] [2021-06-14 09:25:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:25:07,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:07,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270379570] [2021-06-14 09:25:07,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270379570] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:07,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:07,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:07,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156581853] [2021-06-14 09:25:07,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:07,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:07,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:07,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:07,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:07,611 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:07,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:07,611 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:07,611 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:07,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362 [2021-06-14 09:25:07,686 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:07,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:07,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1096130258, now seen corresponding path program 1 times [2021-06-14 09:25:07,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:07,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683463185] [2021-06-14 09:25:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:07,689 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:07,690 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:07,692 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:07,692 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:07,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363 [2021-06-14 09:25:07,692 INFO L301 ceAbstractionStarter]: Result for error location fooThread13of19ForFork0 was UNSAFE (1/21) [2021-06-14 09:25:07,693 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:07,721 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:07,721 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:07,721 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:07,721 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:07,721 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:07,721 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:07,721 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:07,721 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread15of19ForFork0======== [2021-06-14 09:25:08,286 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:08,286 INFO L82 PathProgramCache]: Analyzing trace with hash 812752687, now seen corresponding path program 1 times [2021-06-14 09:25:08,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:08,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821870710] [2021-06-14 09:25:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-06-14 09:25:08,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:08,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821870710] [2021-06-14 09:25:08,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821870710] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:08,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:08,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:08,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008992488] [2021-06-14 09:25:08,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:08,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:08,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:08,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:08,298 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:08,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:08,299 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:08,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364 [2021-06-14 09:25:08,343 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:08,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:08,343 INFO L82 PathProgramCache]: Analyzing trace with hash 812753648, now seen corresponding path program 1 times [2021-06-14 09:25:08,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:08,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222711075] [2021-06-14 09:25:08,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-06-14 09:25:08,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:08,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222711075] [2021-06-14 09:25:08,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222711075] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:08,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:08,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:08,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215817911] [2021-06-14 09:25:08,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:08,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:08,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:08,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:08,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:08,356 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:08,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:08,356 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:08,356 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:08,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:08,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365 [2021-06-14 09:25:08,430 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:08,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:08,430 INFO L82 PathProgramCache]: Analyzing trace with hash -574439533, now seen corresponding path program 1 times [2021-06-14 09:25:08,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:08,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832108238] [2021-06-14 09:25:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:08,434 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:08,436 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:08,438 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:08,438 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:08,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366 [2021-06-14 09:25:08,439 INFO L301 ceAbstractionStarter]: Result for error location fooThread15of19ForFork0 was UNSAFE (2/21) [2021-06-14 09:25:08,439 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:08,447 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:08,447 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:08,447 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:08,447 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:08,447 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:08,447 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:08,447 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:08,447 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:25:09,136 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (3/21) [2021-06-14 09:25:09,137 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:09,141 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:09,141 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:09,141 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:09,141 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:09,141 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:09,141 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:09,141 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:09,141 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread12of19ForFork0======== [2021-06-14 09:25:09,677 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:09,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:09,678 INFO L82 PathProgramCache]: Analyzing trace with hash -220283483, now seen corresponding path program 1 times [2021-06-14 09:25:09,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:09,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853380646] [2021-06-14 09:25:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:25:09,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:09,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853380646] [2021-06-14 09:25:09,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853380646] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:09,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:09,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:09,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594329816] [2021-06-14 09:25:09,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:09,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:09,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:09,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:09,688 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:09,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:09,688 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:09,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367 [2021-06-14 09:25:09,739 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:09,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:09,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1761147902, now seen corresponding path program 1 times [2021-06-14 09:25:09,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:09,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163328536] [2021-06-14 09:25:09,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:25:09,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:09,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163328536] [2021-06-14 09:25:09,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163328536] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:09,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:09,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:09,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945913864] [2021-06-14 09:25:09,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:09,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:09,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:09,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:09,751 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:09,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:09,752 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:09,752 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:09,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368 [2021-06-14 09:25:09,819 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:09,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:09,819 INFO L82 PathProgramCache]: Analyzing trace with hash 246062300, now seen corresponding path program 1 times [2021-06-14 09:25:09,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:09,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844938295] [2021-06-14 09:25:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:09,821 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:09,822 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:09,824 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:09,824 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:09,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369 [2021-06-14 09:25:09,824 INFO L301 ceAbstractionStarter]: Result for error location fooThread12of19ForFork0 was UNSAFE (4/21) [2021-06-14 09:25:09,825 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:09,829 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:09,829 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:09,829 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:09,829 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:09,829 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:09,829 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:09,829 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:09,829 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread16of19ForFork0======== [2021-06-14 09:25:10,400 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:10,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1103942038, now seen corresponding path program 1 times [2021-06-14 09:25:10,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:10,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785645689] [2021-06-14 09:25:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:25:10,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:10,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785645689] [2021-06-14 09:25:10,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785645689] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:10,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:10,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:10,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632336390] [2021-06-14 09:25:10,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:10,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:10,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:10,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:10,418 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:10,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:10,418 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:10,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:10,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370 [2021-06-14 09:25:10,473 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:10,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:10,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1991445719, now seen corresponding path program 1 times [2021-06-14 09:25:10,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:10,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913246638] [2021-06-14 09:25:10,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:25:10,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:10,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913246638] [2021-06-14 09:25:10,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913246638] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:10,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:10,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:10,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66089265] [2021-06-14 09:25:10,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:10,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:10,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:10,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:10,487 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:10,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:10,487 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:10,487 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:10,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371 [2021-06-14 09:25:10,558 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:10,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:10,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1992369240, now seen corresponding path program 1 times [2021-06-14 09:25:10,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:10,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357758088] [2021-06-14 09:25:10,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:10,563 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:10,565 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:10,566 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:10,566 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:10,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372 [2021-06-14 09:25:10,567 INFO L301 ceAbstractionStarter]: Result for error location fooThread16of19ForFork0 was UNSAFE (5/21) [2021-06-14 09:25:10,567 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:10,571 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:10,571 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:10,571 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:10,571 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:10,571 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:10,571 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:10,571 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:10,571 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of19ForFork0======== [2021-06-14 09:25:11,051 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:11,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:11,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1858905265, now seen corresponding path program 1 times [2021-06-14 09:25:11,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:11,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799993785] [2021-06-14 09:25:11,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:11,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:11,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799993785] [2021-06-14 09:25:11,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799993785] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:11,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:11,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:11,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753264714] [2021-06-14 09:25:11,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:11,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:11,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:11,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:11,064 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:11,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:11,064 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:11,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:11,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373 [2021-06-14 09:25:11,181 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:11,181 INFO L82 PathProgramCache]: Analyzing trace with hash -60080049, now seen corresponding path program 1 times [2021-06-14 09:25:11,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:11,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984603720] [2021-06-14 09:25:11,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:11,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:11,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984603720] [2021-06-14 09:25:11,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984603720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:25:11,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705142808] [2021-06-14 09:25:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:25:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:11,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:25:11,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:25:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:11,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705142808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:25:11,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:25:11,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:25:11,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611078435] [2021-06-14 09:25:11,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:11,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:11,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:11,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:11,341 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:11,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:11,341 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:11,342 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:11,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:25:11,670 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:11,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:11,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2130892879, now seen corresponding path program 1 times [2021-06-14 09:25:11,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:11,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195665504] [2021-06-14 09:25:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:11,672 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:11,673 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:11,674 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:11,674 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:11,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375 [2021-06-14 09:25:11,674 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of19ForFork0 was UNSAFE (6/21) [2021-06-14 09:25:11,675 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:11,678 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:11,678 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:11,678 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:11,678 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:11,678 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:11,678 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:11,678 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:11,678 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of19ForFork0======== [2021-06-14 09:25:12,292 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:12,292 INFO L82 PathProgramCache]: Analyzing trace with hash -861491543, now seen corresponding path program 1 times [2021-06-14 09:25:12,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:12,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718986054] [2021-06-14 09:25:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:25:12,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718986054] [2021-06-14 09:25:12,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718986054] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:12,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:12,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:12,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3473920] [2021-06-14 09:25:12,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:12,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:12,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:12,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:12,302 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:12,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:12,302 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:12,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376 [2021-06-14 09:25:12,324 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:12,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:12,325 INFO L82 PathProgramCache]: Analyzing trace with hash -861490582, now seen corresponding path program 1 times [2021-06-14 09:25:12,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:12,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937867618] [2021-06-14 09:25:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:25:12,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:12,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937867618] [2021-06-14 09:25:12,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937867618] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:12,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:12,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:12,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122059061] [2021-06-14 09:25:12,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:12,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:12,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:12,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:12,336 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:12,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:12,336 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:12,336 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:12,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377 [2021-06-14 09:25:12,485 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:12,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:12,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1595768989, now seen corresponding path program 1 times [2021-06-14 09:25:12,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:12,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443940075] [2021-06-14 09:25:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:12,487 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:12,487 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:12,488 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:12,488 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:12,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable378 [2021-06-14 09:25:12,489 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of19ForFork0 was UNSAFE (7/21) [2021-06-14 09:25:12,489 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:12,492 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:12,492 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:12,492 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:12,492 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:12,492 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:12,492 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:12,492 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:12,492 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread9of19ForFork0======== [2021-06-14 09:25:13,012 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:13,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash 573235591, now seen corresponding path program 1 times [2021-06-14 09:25:13,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:13,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636557399] [2021-06-14 09:25:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:25:13,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:13,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636557399] [2021-06-14 09:25:13,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636557399] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:13,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:13,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:13,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608326785] [2021-06-14 09:25:13,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:13,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:13,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:13,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:13,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:13,025 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:13,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:13,026 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:13,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:13,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379 [2021-06-14 09:25:13,058 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:13,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:13,058 INFO L82 PathProgramCache]: Analyzing trace with hash 574159112, now seen corresponding path program 1 times [2021-06-14 09:25:13,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:13,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374265716] [2021-06-14 09:25:13,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:25:13,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:13,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374265716] [2021-06-14 09:25:13,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374265716] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:13,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:13,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:13,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143020994] [2021-06-14 09:25:13,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:13,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:13,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:13,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:13,070 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:13,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:13,070 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:13,070 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:13,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:13,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:13,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380 [2021-06-14 09:25:13,111 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:13,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:13,111 INFO L82 PathProgramCache]: Analyzing trace with hash 574160073, now seen corresponding path program 1 times [2021-06-14 09:25:13,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:13,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937094564] [2021-06-14 09:25:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:13,113 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:13,114 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:13,115 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:13,115 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:13,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381 [2021-06-14 09:25:13,115 INFO L301 ceAbstractionStarter]: Result for error location fooThread9of19ForFork0 was UNSAFE (8/21) [2021-06-14 09:25:13,116 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:13,119 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:13,120 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:13,120 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:13,120 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:13,120 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:13,120 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:13,120 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:13,120 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of19ForFork0======== [2021-06-14 09:25:13,661 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:13,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:13,661 INFO L82 PathProgramCache]: Analyzing trace with hash -498451287, now seen corresponding path program 1 times [2021-06-14 09:25:13,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:13,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349992847] [2021-06-14 09:25:13,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:25:13,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:13,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349992847] [2021-06-14 09:25:13,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349992847] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:13,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:13,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:13,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418809546] [2021-06-14 09:25:13,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:13,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:13,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:13,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:13,675 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:13,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:13,675 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:13,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382 [2021-06-14 09:25:13,706 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:13,706 INFO L82 PathProgramCache]: Analyzing trace with hash -497527766, now seen corresponding path program 1 times [2021-06-14 09:25:13,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:13,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605933783] [2021-06-14 09:25:13,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:25:13,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:13,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605933783] [2021-06-14 09:25:13,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605933783] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:13,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:13,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:13,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446968694] [2021-06-14 09:25:13,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:13,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:13,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:13,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:13,727 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:13,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:13,727 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:13,727 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:13,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383 [2021-06-14 09:25:13,764 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:13,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:13,765 INFO L82 PathProgramCache]: Analyzing trace with hash -497526805, now seen corresponding path program 1 times [2021-06-14 09:25:13,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:13,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796152604] [2021-06-14 09:25:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:13,767 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:13,768 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:13,769 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:13,769 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:13,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384 [2021-06-14 09:25:13,770 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of19ForFork0 was UNSAFE (9/21) [2021-06-14 09:25:13,770 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:13,774 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:13,774 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:13,774 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:13,774 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:13,774 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:13,774 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:13,774 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:13,774 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread14of19ForFork0======== [2021-06-14 09:25:14,352 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:14,352 INFO L82 PathProgramCache]: Analyzing trace with hash 446067568, now seen corresponding path program 1 times [2021-06-14 09:25:14,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:14,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306873505] [2021-06-14 09:25:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:25:14,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:14,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306873505] [2021-06-14 09:25:14,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306873505] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:14,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:14,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:14,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112277561] [2021-06-14 09:25:14,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:14,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:14,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:14,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:14,362 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:14,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:14,362 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:14,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385 [2021-06-14 09:25:14,424 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:14,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:14,424 INFO L82 PathProgramCache]: Analyzing trace with hash 152664561, now seen corresponding path program 1 times [2021-06-14 09:25:14,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:14,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347333115] [2021-06-14 09:25:14,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:25:14,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347333115] [2021-06-14 09:25:14,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347333115] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:14,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:14,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:14,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545122464] [2021-06-14 09:25:14,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:14,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:14,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:14,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:14,436 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:14,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:14,436 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:14,437 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:14,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386 [2021-06-14 09:25:14,512 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:14,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1644286798, now seen corresponding path program 1 times [2021-06-14 09:25:14,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:14,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975105963] [2021-06-14 09:25:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:14,515 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:14,516 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:14,518 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:14,518 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:14,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387 [2021-06-14 09:25:14,519 INFO L301 ceAbstractionStarter]: Result for error location fooThread14of19ForFork0 was UNSAFE (10/21) [2021-06-14 09:25:14,519 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:14,524 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:14,524 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:14,524 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:14,524 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:14,524 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:14,524 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:14,524 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:14,524 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of19ForFork0======== [2021-06-14 09:25:15,034 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:15,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:15,035 INFO L82 PathProgramCache]: Analyzing trace with hash -88787691, now seen corresponding path program 1 times [2021-06-14 09:25:15,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:15,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955224803] [2021-06-14 09:25:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:25:15,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:15,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955224803] [2021-06-14 09:25:15,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955224803] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:15,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:15,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:15,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465004445] [2021-06-14 09:25:15,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:15,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:15,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:15,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:15,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:15,044 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:15,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:15,044 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:15,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:15,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388 [2021-06-14 09:25:15,067 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:15,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:15,067 INFO L82 PathProgramCache]: Analyzing trace with hash -87864170, now seen corresponding path program 1 times [2021-06-14 09:25:15,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:15,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542546826] [2021-06-14 09:25:15,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:25:15,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:15,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542546826] [2021-06-14 09:25:15,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542546826] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:15,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:15,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:15,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687120493] [2021-06-14 09:25:15,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:15,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:15,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:15,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:15,082 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:15,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:15,082 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:15,082 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:15,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:15,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:15,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable389 [2021-06-14 09:25:15,109 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:15,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:15,109 INFO L82 PathProgramCache]: Analyzing trace with hash -87863209, now seen corresponding path program 1 times [2021-06-14 09:25:15,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:15,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042624142] [2021-06-14 09:25:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:15,112 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:15,113 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:15,114 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:15,114 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:15,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390 [2021-06-14 09:25:15,115 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of19ForFork0 was UNSAFE (11/21) [2021-06-14 09:25:15,115 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:15,118 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:15,118 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:15,118 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:15,118 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:15,118 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:15,118 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:15,119 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:15,119 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of19ForFork0======== [2021-06-14 09:25:15,761 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:15,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:15,761 INFO L82 PathProgramCache]: Analyzing trace with hash -161869935, now seen corresponding path program 1 times [2021-06-14 09:25:15,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:15,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348741404] [2021-06-14 09:25:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:25:15,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:15,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348741404] [2021-06-14 09:25:15,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348741404] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:15,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:15,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:15,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988837845] [2021-06-14 09:25:15,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:15,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:15,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:15,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:15,783 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:15,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:15,783 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:15,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:15,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391 [2021-06-14 09:25:15,820 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:15,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:15,821 INFO L82 PathProgramCache]: Analyzing trace with hash 725633746, now seen corresponding path program 1 times [2021-06-14 09:25:15,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:15,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105927806] [2021-06-14 09:25:15,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:25:15,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:15,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105927806] [2021-06-14 09:25:15,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105927806] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:15,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:15,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:15,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692746179] [2021-06-14 09:25:15,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:15,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:15,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:15,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:15,835 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:15,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:15,836 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:15,836 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:15,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392 [2021-06-14 09:25:15,870 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:15,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:15,870 INFO L82 PathProgramCache]: Analyzing trace with hash 726557267, now seen corresponding path program 1 times [2021-06-14 09:25:15,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:15,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532768290] [2021-06-14 09:25:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:15,873 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:15,874 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:15,874 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:15,874 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:15,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393 [2021-06-14 09:25:15,875 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of19ForFork0 was UNSAFE (12/21) [2021-06-14 09:25:15,875 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:15,916 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:15,916 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:15,916 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:15,916 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:15,916 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:15,916 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:15,916 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:15,916 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of19ForFork0======== [2021-06-14 09:25:16,415 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:16,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:16,416 INFO L82 PathProgramCache]: Analyzing trace with hash -657659614, now seen corresponding path program 1 times [2021-06-14 09:25:16,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:16,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506596112] [2021-06-14 09:25:16,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:25:16,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:16,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506596112] [2021-06-14 09:25:16,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506596112] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:16,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:16,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:16,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322581387] [2021-06-14 09:25:16,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:16,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:16,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:16,425 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:16,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:16,425 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:16,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394 [2021-06-14 09:25:16,452 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:16,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:16,452 INFO L82 PathProgramCache]: Analyzing trace with hash -656736093, now seen corresponding path program 1 times [2021-06-14 09:25:16,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:16,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593534433] [2021-06-14 09:25:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:25:16,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:16,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593534433] [2021-06-14 09:25:16,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593534433] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:16,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:16,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:16,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959168984] [2021-06-14 09:25:16,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:16,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:16,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:16,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:16,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:16,463 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:16,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:16,464 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:16,464 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:16,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:16,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395 [2021-06-14 09:25:16,483 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:16,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:16,483 INFO L82 PathProgramCache]: Analyzing trace with hash -656735132, now seen corresponding path program 1 times [2021-06-14 09:25:16,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:16,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95162997] [2021-06-14 09:25:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:16,485 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:16,486 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:16,487 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:16,487 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:16,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396 [2021-06-14 09:25:16,487 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of19ForFork0 was UNSAFE (13/21) [2021-06-14 09:25:16,487 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:16,491 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:16,491 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:16,491 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:16,491 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:16,491 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:16,491 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:16,491 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:16,491 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread7of19ForFork0======== [2021-06-14 09:25:17,032 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:17,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:17,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1570773807, now seen corresponding path program 1 times [2021-06-14 09:25:17,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:17,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487417781] [2021-06-14 09:25:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:25:17,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:17,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487417781] [2021-06-14 09:25:17,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487417781] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:17,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:17,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:17,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801610857] [2021-06-14 09:25:17,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:17,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:17,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:17,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:17,042 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:17,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:17,042 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:17,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397 [2021-06-14 09:25:17,080 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:17,080 INFO L82 PathProgramCache]: Analyzing trace with hash -226177552, now seen corresponding path program 1 times [2021-06-14 09:25:17,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:17,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687672920] [2021-06-14 09:25:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:25:17,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:17,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687672920] [2021-06-14 09:25:17,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687672920] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:17,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:17,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:17,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132958005] [2021-06-14 09:25:17,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:17,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:17,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:17,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:17,093 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:17,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:17,093 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:17,093 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:17,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398 [2021-06-14 09:25:17,138 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:17,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:17,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2033632015, now seen corresponding path program 1 times [2021-06-14 09:25:17,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:17,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516710329] [2021-06-14 09:25:17,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:17,141 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:17,142 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:17,143 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:17,143 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:17,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399 [2021-06-14 09:25:17,143 INFO L301 ceAbstractionStarter]: Result for error location fooThread7of19ForFork0 was UNSAFE (14/21) [2021-06-14 09:25:17,143 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:17,147 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:17,147 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:17,147 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:17,147 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:17,147 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:17,147 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:17,147 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:17,147 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:25:17,663 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:25:17,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:17,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1526902506, now seen corresponding path program 1 times [2021-06-14 09:25:17,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:17,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902714490] [2021-06-14 09:25:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:17,666 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:17,668 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:17,669 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:17,669 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:17,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400 [2021-06-14 09:25:17,669 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (15/21) [2021-06-14 09:25:17,669 WARN L243 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:25:17,670 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2021-06-14 09:25:17,687 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:25:17,688 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:17,692 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:17,692 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:17,692 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:17,692 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:17,692 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:17,692 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:17,692 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:17,693 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread7of20ForFork0======== [2021-06-14 09:25:18,248 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:18,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:18,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1801434991, now seen corresponding path program 1 times [2021-06-14 09:25:18,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:18,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685978689] [2021-06-14 09:25:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:25:18,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:18,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685978689] [2021-06-14 09:25:18,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685978689] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:18,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:18,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:18,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105421066] [2021-06-14 09:25:18,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:18,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:18,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:18,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:18,261 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:18,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:18,261 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:18,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401 [2021-06-14 09:25:18,299 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:18,300 INFO L82 PathProgramCache]: Analyzing trace with hash 9911377, now seen corresponding path program 1 times [2021-06-14 09:25:18,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:18,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532055016] [2021-06-14 09:25:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:25:18,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:18,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532055016] [2021-06-14 09:25:18,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532055016] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:18,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:18,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:18,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211949507] [2021-06-14 09:25:18,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:18,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:18,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:18,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:18,313 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:18,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:18,313 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:18,313 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:18,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:18,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:18,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402 [2021-06-14 09:25:18,384 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:18,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:18,384 INFO L82 PathProgramCache]: Analyzing trace with hash 934949127, now seen corresponding path program 1 times [2021-06-14 09:25:18,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:18,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442144100] [2021-06-14 09:25:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:18,386 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:18,387 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:18,388 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:18,388 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:18,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403 [2021-06-14 09:25:18,389 INFO L301 ceAbstractionStarter]: Result for error location fooThread7of20ForFork0 was UNSAFE (1/22) [2021-06-14 09:25:18,389 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:25:18,410 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:18,410 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:18,410 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:18,410 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:18,410 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:18,410 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:18,410 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:18,410 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of20ForFork0======== Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:19,115 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:19,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:19,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2100122417, now seen corresponding path program 1 times [2021-06-14 09:25:19,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:19,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19725229] [2021-06-14 09:25:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:25:19,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:19,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19725229] [2021-06-14 09:25:19,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19725229] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:19,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:19,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:19,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489339561] [2021-06-14 09:25:19,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:19,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:19,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:19,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:19,124 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:19,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:19,124 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:19,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404 [2021-06-14 09:25:19,152 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:19,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:19,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2100123378, now seen corresponding path program 1 times [2021-06-14 09:25:19,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:19,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100714345] [2021-06-14 09:25:19,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:25:19,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:19,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100714345] [2021-06-14 09:25:19,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100714345] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:19,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:19,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:19,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177757815] [2021-06-14 09:25:19,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:19,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:19,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:19,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:19,164 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:19,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:19,164 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:19,164 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:19,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:19,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405 [2021-06-14 09:25:19,213 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:19,213 INFO L82 PathProgramCache]: Analyzing trace with hash 679316662, now seen corresponding path program 1 times [2021-06-14 09:25:19,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:19,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135097819] [2021-06-14 09:25:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:19,215 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:19,216 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:19,217 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:19,217 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:19,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406 [2021-06-14 09:25:19,218 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of20ForFork0 was UNSAFE (2/22) [2021-06-14 09:25:19,218 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:25:19,236 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:19,237 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:19,237 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:19,237 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:19,237 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:19,237 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:19,237 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:19,237 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread20of20ForFork0======== Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:19,871 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:19,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:19,871 INFO L82 PathProgramCache]: Analyzing trace with hash 211465868, now seen corresponding path program 1 times [2021-06-14 09:25:19,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:19,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121733625] [2021-06-14 09:25:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-06-14 09:25:19,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:19,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121733625] [2021-06-14 09:25:19,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121733625] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:19,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:19,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:19,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853695986] [2021-06-14 09:25:19,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:19,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:19,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:19,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:19,888 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:19,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:19,888 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:19,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407 [2021-06-14 09:25:19,968 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:19,968 INFO L82 PathProgramCache]: Analyzing trace with hash 212389389, now seen corresponding path program 1 times [2021-06-14 09:25:19,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:19,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626354364] [2021-06-14 09:25:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-06-14 09:25:19,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:19,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626354364] [2021-06-14 09:25:19,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626354364] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:19,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:19,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:19,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057386147] [2021-06-14 09:25:19,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:19,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:19,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:19,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:19,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:19,985 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:19,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:19,986 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:19,986 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:20,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408 [2021-06-14 09:25:20,079 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:20,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:20,080 INFO L82 PathProgramCache]: Analyzing trace with hash 212390350, now seen corresponding path program 1 times [2021-06-14 09:25:20,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:20,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899353558] [2021-06-14 09:25:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:20,083 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:20,085 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:20,086 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:20,086 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:20,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409 [2021-06-14 09:25:20,087 INFO L301 ceAbstractionStarter]: Result for error location fooThread20of20ForFork0 was UNSAFE (3/22) [2021-06-14 09:25:20,087 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:20,090 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:20,090 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:20,090 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:20,090 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:20,090 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:20,090 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:20,090 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:20,090 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of20ForFork0======== [2021-06-14 09:25:20,629 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:20,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1606303824, now seen corresponding path program 1 times [2021-06-14 09:25:20,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:20,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785807786] [2021-06-14 09:25:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:25:20,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:20,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785807786] [2021-06-14 09:25:20,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785807786] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:20,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:20,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:20,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998352516] [2021-06-14 09:25:20,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:20,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:20,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:20,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:20,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:20,638 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:20,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:20,638 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:20,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410 [2021-06-14 09:25:20,670 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:20,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1744190524, now seen corresponding path program 1 times [2021-06-14 09:25:20,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:20,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409478910] [2021-06-14 09:25:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:25:20,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:20,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409478910] [2021-06-14 09:25:20,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409478910] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:20,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:20,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:20,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705298098] [2021-06-14 09:25:20,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:20,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:20,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:20,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:20,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:20,682 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:20,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:20,682 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:20,682 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:20,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable411 [2021-06-14 09:25:20,727 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:20,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:20,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1129898682, now seen corresponding path program 1 times [2021-06-14 09:25:20,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:20,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464150832] [2021-06-14 09:25:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:20,729 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:20,730 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:20,731 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:20,731 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:20,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412 [2021-06-14 09:25:20,732 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of20ForFork0 was UNSAFE (4/22) [2021-06-14 09:25:20,732 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:20,736 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:20,736 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:20,736 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:20,736 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:20,737 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:20,737 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:20,737 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:20,737 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread9of20ForFork0======== [2021-06-14 09:25:21,325 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:21,325 INFO L82 PathProgramCache]: Analyzing trace with hash 473404469, now seen corresponding path program 1 times [2021-06-14 09:25:21,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:21,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36194418] [2021-06-14 09:25:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:25:21,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:21,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36194418] [2021-06-14 09:25:21,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36194418] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:21,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:21,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:21,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904012395] [2021-06-14 09:25:21,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:21,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:21,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:21,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:21,334 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:21,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:21,334 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:21,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413 [2021-06-14 09:25:21,372 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:21,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:21,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1360908150, now seen corresponding path program 1 times [2021-06-14 09:25:21,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:21,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920071921] [2021-06-14 09:25:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:25:21,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:21,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920071921] [2021-06-14 09:25:21,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920071921] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:21,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:21,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:21,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109299113] [2021-06-14 09:25:21,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:21,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:21,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:21,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:21,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:21,390 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:21,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:21,390 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:21,390 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:21,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414 [2021-06-14 09:25:21,436 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:21,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:21,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1361831671, now seen corresponding path program 1 times [2021-06-14 09:25:21,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:21,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573496872] [2021-06-14 09:25:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:21,439 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:21,440 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:21,441 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:21,441 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:21,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415 [2021-06-14 09:25:21,441 INFO L301 ceAbstractionStarter]: Result for error location fooThread9of20ForFork0 was UNSAFE (5/22) [2021-06-14 09:25:21,441 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:21,445 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:21,445 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:21,445 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:21,445 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:21,445 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:21,445 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:21,445 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:21,445 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:25:22,152 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (6/22) [2021-06-14 09:25:22,152 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:22,156 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:22,156 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:22,156 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:22,156 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:22,156 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:22,157 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:22,157 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:22,157 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread10of20ForFork0======== [2021-06-14 09:25:22,774 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:22,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:22,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1353387001, now seen corresponding path program 1 times [2021-06-14 09:25:22,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:22,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63282308] [2021-06-14 09:25:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:25:22,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:22,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63282308] [2021-06-14 09:25:22,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63282308] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:22,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:22,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:22,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154279571] [2021-06-14 09:25:22,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:22,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:22,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:22,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:22,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:22,783 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:22,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:22,784 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:22,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416 [2021-06-14 09:25:22,845 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash -454067462, now seen corresponding path program 1 times [2021-06-14 09:25:22,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:22,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208054627] [2021-06-14 09:25:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:25:22,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:22,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208054627] [2021-06-14 09:25:22,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208054627] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:22,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:22,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:22,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083963080] [2021-06-14 09:25:22,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:22,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:22,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:22,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:22,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:22,857 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:22,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:22,858 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:22,858 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:22,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:22,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417 [2021-06-14 09:25:22,911 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:22,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:22,911 INFO L82 PathProgramCache]: Analyzing trace with hash 433436219, now seen corresponding path program 1 times [2021-06-14 09:25:22,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:22,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245172762] [2021-06-14 09:25:22,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:22,914 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:22,915 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:22,916 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:22,916 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:22,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418 [2021-06-14 09:25:22,916 INFO L301 ceAbstractionStarter]: Result for error location fooThread10of20ForFork0 was UNSAFE (7/22) [2021-06-14 09:25:22,917 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:22,920 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:22,920 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:22,920 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:22,920 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:22,920 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:22,920 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:22,920 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:22,920 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of20ForFork0======== [2021-06-14 09:25:23,470 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:23,470 INFO L82 PathProgramCache]: Analyzing trace with hash 284121077, now seen corresponding path program 1 times [2021-06-14 09:25:23,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:23,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897865657] [2021-06-14 09:25:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:25:23,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:23,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897865657] [2021-06-14 09:25:23,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897865657] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:23,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:23,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:23,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047668380] [2021-06-14 09:25:23,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:23,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:23,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:23,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:23,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:23,478 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:23,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:23,478 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:23,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:23,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419 [2021-06-14 09:25:23,506 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:23,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:23,506 INFO L82 PathProgramCache]: Analyzing trace with hash 217820199, now seen corresponding path program 1 times [2021-06-14 09:25:23,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:23,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695609510] [2021-06-14 09:25:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:25:23,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:23,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695609510] [2021-06-14 09:25:23,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695609510] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:23,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:23,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:23,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922083249] [2021-06-14 09:25:23,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:23,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:23,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:23,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:23,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:23,517 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:23,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:23,517 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:23,517 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:23,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420 [2021-06-14 09:25:23,553 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1128138919, now seen corresponding path program 1 times [2021-06-14 09:25:23,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:23,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815229701] [2021-06-14 09:25:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:23,555 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:23,556 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:23,556 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:23,556 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:23,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421 [2021-06-14 09:25:23,557 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of20ForFork0 was UNSAFE (8/22) [2021-06-14 09:25:23,557 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:23,583 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:23,583 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:23,584 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:23,584 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:23,584 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:23,584 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:23,584 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:23,584 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of20ForFork0======== [2021-06-14 09:25:24,132 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:24,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1686563149, now seen corresponding path program 1 times [2021-06-14 09:25:24,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:24,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992271140] [2021-06-14 09:25:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:25:24,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:24,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992271140] [2021-06-14 09:25:24,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992271140] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:24,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:24,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:24,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790005492] [2021-06-14 09:25:24,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:24,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:24,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:24,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:24,141 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:24,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:24,141 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:24,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422 [2021-06-14 09:25:24,161 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:24,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1686562188, now seen corresponding path program 1 times [2021-06-14 09:25:24,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:24,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962324698] [2021-06-14 09:25:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:25:24,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:24,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962324698] [2021-06-14 09:25:24,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962324698] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:24,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:24,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:24,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063824645] [2021-06-14 09:25:24,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:24,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:24,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:24,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:24,173 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:24,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:24,173 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:24,173 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:24,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:24,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423 [2021-06-14 09:25:24,211 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:24,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:24,211 INFO L82 PathProgramCache]: Analyzing trace with hash -743818992, now seen corresponding path program 1 times [2021-06-14 09:25:24,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:24,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498255588] [2021-06-14 09:25:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:24,214 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:24,215 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:24,216 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:24,216 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:24,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424 [2021-06-14 09:25:24,217 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of20ForFork0 was UNSAFE (9/22) [2021-06-14 09:25:24,217 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:24,221 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:24,221 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:24,221 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:24,221 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:24,221 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:24,221 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:24,221 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:24,221 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of20ForFork0======== [2021-06-14 09:25:24,754 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:24,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:24,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1653415175, now seen corresponding path program 1 times [2021-06-14 09:25:24,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:24,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223341088] [2021-06-14 09:25:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:25:24,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:24,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223341088] [2021-06-14 09:25:24,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223341088] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:24,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:24,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:24,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936238762] [2021-06-14 09:25:24,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:24,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:24,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:24,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:24,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:24,765 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:24,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:24,765 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:24,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425 [2021-06-14 09:25:24,790 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:24,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:24,790 INFO L82 PathProgramCache]: Analyzing trace with hash 283738787, now seen corresponding path program 1 times [2021-06-14 09:25:24,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:24,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454790025] [2021-06-14 09:25:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:25:24,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:24,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454790025] [2021-06-14 09:25:24,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454790025] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:24,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:24,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:24,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599549061] [2021-06-14 09:25:24,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:24,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:24,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:24,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:24,801 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:24,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:24,802 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:24,802 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:25,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426 [2021-06-14 09:25:25,187 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:25,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:25,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1854712941, now seen corresponding path program 1 times [2021-06-14 09:25:25,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:25,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167710283] [2021-06-14 09:25:25,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:25,190 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:25,190 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:25,191 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:25,191 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:25,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427 [2021-06-14 09:25:25,192 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of20ForFork0 was UNSAFE (10/22) [2021-06-14 09:25:25,192 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:25,195 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:25,196 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:25,196 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:25,196 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:25,196 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:25,196 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:25,196 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:25,196 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread16of20ForFork0======== [2021-06-14 09:25:25,871 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:25,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:25,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1626853852, now seen corresponding path program 1 times [2021-06-14 09:25:25,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:25,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224313697] [2021-06-14 09:25:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:25:25,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:25,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224313697] [2021-06-14 09:25:25,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224313697] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:25,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:25,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:25,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739883205] [2021-06-14 09:25:25,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:25,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:25,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:25,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:25,884 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:25,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:25,884 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:25,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428 [2021-06-14 09:25:25,967 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:25,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:25,967 INFO L82 PathProgramCache]: Analyzing trace with hash -273544155, now seen corresponding path program 1 times [2021-06-14 09:25:25,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:25,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136628148] [2021-06-14 09:25:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:25:25,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:25,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136628148] [2021-06-14 09:25:25,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136628148] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:25,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:25,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:25,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025037310] [2021-06-14 09:25:25,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:25,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:25,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:25,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:25,997 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:25,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:25,997 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:25,997 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:26,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429 [2021-06-14 09:25:26,123 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:26,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:26,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1234007654, now seen corresponding path program 1 times [2021-06-14 09:25:26,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:26,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894865324] [2021-06-14 09:25:26,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:26,127 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:26,128 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:26,130 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:26,130 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:26,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430 [2021-06-14 09:25:26,131 INFO L301 ceAbstractionStarter]: Result for error location fooThread16of20ForFork0 was UNSAFE (11/22) [2021-06-14 09:25:26,131 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:25:26,141 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:26,141 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:26,141 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:26,141 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:26,142 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:26,142 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:26,142 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:26,142 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread15of20ForFork0======== Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:26,837 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:26,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:26,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1843087461, now seen corresponding path program 1 times [2021-06-14 09:25:26,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:26,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430842685] [2021-06-14 09:25:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-06-14 09:25:26,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:26,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430842685] [2021-06-14 09:25:26,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430842685] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:26,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:26,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:26,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235905174] [2021-06-14 09:25:26,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:26,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:26,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:26,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:26,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:26,847 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:26,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:26,847 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:26,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431 [2021-06-14 09:25:26,925 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:26,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:26,925 INFO L82 PathProgramCache]: Analyzing trace with hash -489777764, now seen corresponding path program 1 times [2021-06-14 09:25:26,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:26,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452068091] [2021-06-14 09:25:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-06-14 09:25:26,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:26,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452068091] [2021-06-14 09:25:26,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452068091] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:26,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:26,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:26,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974741869] [2021-06-14 09:25:26,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:26,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:26,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:26,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:26,943 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:26,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:26,943 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:26,943 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:27,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable432 [2021-06-14 09:25:27,044 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:27,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:27,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1017774045, now seen corresponding path program 1 times [2021-06-14 09:25:27,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:27,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611805877] [2021-06-14 09:25:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:27,047 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:27,049 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:27,051 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:27,051 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:27,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable433 [2021-06-14 09:25:27,052 INFO L301 ceAbstractionStarter]: Result for error location fooThread15of20ForFork0 was UNSAFE (12/22) [2021-06-14 09:25:27,052 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:27,057 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:27,057 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:27,057 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:27,057 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:27,057 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:27,057 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:27,057 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:27,057 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread17of20ForFork0======== [2021-06-14 09:25:27,767 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:27,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1676129840, now seen corresponding path program 1 times [2021-06-14 09:25:27,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:27,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751015726] [2021-06-14 09:25:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-06-14 09:25:27,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:27,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751015726] [2021-06-14 09:25:27,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751015726] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:27,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:27,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:27,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667367643] [2021-06-14 09:25:27,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:27,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:27,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:27,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:27,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:27,777 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:27,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:27,777 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:27,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:27,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434 [2021-06-14 09:25:27,872 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:27,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1887480753, now seen corresponding path program 1 times [2021-06-14 09:25:27,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:27,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396851574] [2021-06-14 09:25:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-06-14 09:25:27,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:27,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396851574] [2021-06-14 09:25:27,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396851574] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:27,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:27,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:27,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772209746] [2021-06-14 09:25:27,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:27,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:27,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:27,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:27,886 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:27,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:27,886 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:27,886 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:28,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435 [2021-06-14 09:25:28,115 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:28,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:28,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1043008882, now seen corresponding path program 1 times [2021-06-14 09:25:28,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:28,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31761768] [2021-06-14 09:25:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:28,118 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:28,120 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:28,121 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:28,121 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:28,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436 [2021-06-14 09:25:28,122 INFO L301 ceAbstractionStarter]: Result for error location fooThread17of20ForFork0 was UNSAFE (13/22) [2021-06-14 09:25:28,122 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:28,127 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:28,127 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:28,127 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:28,127 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:28,127 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:28,127 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:28,128 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:28,128 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of20ForFork0======== [2021-06-14 09:25:28,646 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:28,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:28,646 INFO L82 PathProgramCache]: Analyzing trace with hash -627498050, now seen corresponding path program 1 times [2021-06-14 09:25:28,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:28,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892562966] [2021-06-14 09:25:28,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:28,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:28,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892562966] [2021-06-14 09:25:28,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892562966] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:28,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:28,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:28,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388929756] [2021-06-14 09:25:28,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:28,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:28,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:28,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:28,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:28,654 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:28,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:28,654 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:28,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437 [2021-06-14 09:25:28,789 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:28,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:28,790 INFO L82 PathProgramCache]: Analyzing trace with hash -605824797, now seen corresponding path program 1 times [2021-06-14 09:25:28,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:28,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107460983] [2021-06-14 09:25:28,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:28,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:28,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107460983] [2021-06-14 09:25:28,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107460983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:25:28,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933392202] [2021-06-14 09:25:28,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:25:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:28,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:25:28,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:25:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:28,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933392202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:25:28,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:25:28,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:25:28,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526252523] [2021-06-14 09:25:28,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:28,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:28,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:28,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:28,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:28,917 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:28,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:28,917 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:28,917 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:29,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:25:29,273 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:29,273 INFO L82 PathProgramCache]: Analyzing trace with hash 374594119, now seen corresponding path program 1 times [2021-06-14 09:25:29,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:29,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060371186] [2021-06-14 09:25:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:29,275 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:29,276 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:29,276 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:29,276 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:29,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439 [2021-06-14 09:25:29,277 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of20ForFork0 was UNSAFE (14/22) [2021-06-14 09:25:29,277 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:29,281 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:29,281 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:29,281 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:29,281 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:29,281 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:29,281 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:29,281 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:29,281 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread14of20ForFork0======== [2021-06-14 09:25:29,952 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:29,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1685122028, now seen corresponding path program 1 times [2021-06-14 09:25:29,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:29,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836540244] [2021-06-14 09:25:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:25:29,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:29,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836540244] [2021-06-14 09:25:29,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836540244] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:29,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:29,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:29,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243932542] [2021-06-14 09:25:29,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:29,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:29,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:29,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:29,965 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:29,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:29,966 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:30,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440 [2021-06-14 09:25:30,046 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:30,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:30,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1765373397, now seen corresponding path program 1 times [2021-06-14 09:25:30,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:30,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167573407] [2021-06-14 09:25:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:25:30,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:30,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167573407] [2021-06-14 09:25:30,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167573407] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:30,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:30,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:30,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592147847] [2021-06-14 09:25:30,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:30,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:30,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:30,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:30,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:30,066 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:30,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:30,066 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:30,066 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:30,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441 [2021-06-14 09:25:30,161 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:30,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:30,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1176284202, now seen corresponding path program 1 times [2021-06-14 09:25:30,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:30,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554838647] [2021-06-14 09:25:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:30,165 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:30,166 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:30,168 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:30,168 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:30,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable442 [2021-06-14 09:25:30,169 INFO L301 ceAbstractionStarter]: Result for error location fooThread14of20ForFork0 was UNSAFE (15/22) [2021-06-14 09:25:30,169 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:30,173 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:30,173 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:30,173 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:30,173 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:30,173 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:30,173 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:30,173 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:30,173 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread18of20ForFork0======== [2021-06-14 09:25:30,906 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:30,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2028200898, now seen corresponding path program 1 times [2021-06-14 09:25:30,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:30,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69081894] [2021-06-14 09:25:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-06-14 09:25:30,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:30,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69081894] [2021-06-14 09:25:30,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69081894] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:30,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:30,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:30,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96070290] [2021-06-14 09:25:30,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:30,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:30,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:30,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:30,939 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:30,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:30,939 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:31,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443 [2021-06-14 09:25:31,174 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:31,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1066586881, now seen corresponding path program 1 times [2021-06-14 09:25:31,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:31,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169884866] [2021-06-14 09:25:31,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-06-14 09:25:31,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:31,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169884866] [2021-06-14 09:25:31,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169884866] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:31,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:31,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:31,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937501922] [2021-06-14 09:25:31,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:31,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:31,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:31,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:31,188 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:31,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:31,188 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:31,188 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:31,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable444 [2021-06-14 09:25:31,320 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:31,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:31,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1151171072, now seen corresponding path program 1 times [2021-06-14 09:25:31,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:31,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786064091] [2021-06-14 09:25:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:31,324 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:31,326 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:31,329 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:31,329 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:31,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445 [2021-06-14 09:25:31,329 INFO L301 ceAbstractionStarter]: Result for error location fooThread18of20ForFork0 was UNSAFE (16/22) [2021-06-14 09:25:31,329 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:25:31,357 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:31,357 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:31,357 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:31,357 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:31,357 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:31,358 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:31,358 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:31,358 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:31,929 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:25:31,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:31,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1704824548, now seen corresponding path program 1 times [2021-06-14 09:25:31,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:31,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627080619] [2021-06-14 09:25:31,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:31,932 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:31,936 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:31,938 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:31,938 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:31,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446 [2021-06-14 09:25:31,938 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (17/22) [2021-06-14 09:25:31,938 WARN L243 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:25:31,939 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2021-06-14 09:25:31,974 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:25:31,975 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:25:31,996 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:31,997 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:31,997 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:31,997 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:31,997 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:31,997 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:31,997 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:31,997 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of21ForFork0======== Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:32,621 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:32,621 INFO L82 PathProgramCache]: Analyzing trace with hash 106868853, now seen corresponding path program 1 times [2021-06-14 09:25:32,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:32,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068717796] [2021-06-14 09:25:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:25:32,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:32,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068717796] [2021-06-14 09:25:32,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068717796] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:32,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:32,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:32,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117314421] [2021-06-14 09:25:32,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:32,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:32,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:32,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:32,631 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:32,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:32,631 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:32,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447 [2021-06-14 09:25:32,668 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:32,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:32,668 INFO L82 PathProgramCache]: Analyzing trace with hash -982031487, now seen corresponding path program 1 times [2021-06-14 09:25:32,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:32,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823699842] [2021-06-14 09:25:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:25:32,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:32,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823699842] [2021-06-14 09:25:32,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823699842] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:32,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:32,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:32,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431133756] [2021-06-14 09:25:32,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:32,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:32,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:32,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:32,680 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:32,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:32,680 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:32,680 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:32,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448 [2021-06-14 09:25:32,729 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:32,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1160591995, now seen corresponding path program 1 times [2021-06-14 09:25:32,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:32,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273864868] [2021-06-14 09:25:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:32,732 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:32,732 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:32,733 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:32,733 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:32,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449 [2021-06-14 09:25:32,734 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of21ForFork0 was UNSAFE (1/23) [2021-06-14 09:25:32,734 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:32,740 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:32,740 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:32,740 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:32,740 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:32,740 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:32,740 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:32,740 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:32,740 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of21ForFork0======== [2021-06-14 09:25:33,339 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:33,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:33,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1590905872, now seen corresponding path program 1 times [2021-06-14 09:25:33,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:33,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224982000] [2021-06-14 09:25:33,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:25:33,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:33,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224982000] [2021-06-14 09:25:33,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224982000] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:33,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:33,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:33,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511692699] [2021-06-14 09:25:33,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:33,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:33,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:33,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:33,348 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:33,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:33,349 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:33,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450 [2021-06-14 09:25:33,381 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:33,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:33,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2073440282, now seen corresponding path program 1 times [2021-06-14 09:25:33,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:33,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874174960] [2021-06-14 09:25:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:25:33,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:33,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874174960] [2021-06-14 09:25:33,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874174960] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:33,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:33,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:33,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237320273] [2021-06-14 09:25:33,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:33,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:33,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:33,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:33,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:33,393 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:33,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:33,394 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:33,394 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:33,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:33,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:33,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451 [2021-06-14 09:25:33,458 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:33,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:33,458 INFO L82 PathProgramCache]: Analyzing trace with hash 288764320, now seen corresponding path program 1 times [2021-06-14 09:25:33,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:33,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815568614] [2021-06-14 09:25:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:33,460 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:33,461 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:33,462 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:33,462 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:33,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452 [2021-06-14 09:25:33,462 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of21ForFork0 was UNSAFE (2/23) [2021-06-14 09:25:33,462 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:33,466 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:33,466 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:33,466 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:33,466 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:33,466 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:33,466 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:33,466 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:33,466 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of21ForFork0======== [2021-06-14 09:25:34,097 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:34,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:34,098 INFO L82 PathProgramCache]: Analyzing trace with hash -572769088, now seen corresponding path program 1 times [2021-06-14 09:25:34,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:34,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281983089] [2021-06-14 09:25:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:25:34,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:34,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281983089] [2021-06-14 09:25:34,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281983089] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:34,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:34,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:34,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513593542] [2021-06-14 09:25:34,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:34,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:34,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:34,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:34,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:34,107 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:34,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:34,107 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:34,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:34,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453 [2021-06-14 09:25:34,140 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:34,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:34,140 INFO L82 PathProgramCache]: Analyzing trace with hash -571845567, now seen corresponding path program 1 times [2021-06-14 09:25:34,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:34,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527435782] [2021-06-14 09:25:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:25:34,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:34,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527435782] [2021-06-14 09:25:34,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527435782] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:34,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:34,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:34,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931571628] [2021-06-14 09:25:34,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:34,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:34,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:34,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:34,154 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:34,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:34,154 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:34,154 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:34,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454 [2021-06-14 09:25:34,193 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:34,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:34,193 INFO L82 PathProgramCache]: Analyzing trace with hash -571844606, now seen corresponding path program 1 times [2021-06-14 09:25:34,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:34,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010233140] [2021-06-14 09:25:34,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:34,196 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:34,196 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:34,197 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:34,197 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:34,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable455 [2021-06-14 09:25:34,198 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of21ForFork0 was UNSAFE (3/23) [2021-06-14 09:25:34,198 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:34,202 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:34,202 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:34,202 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:34,202 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:34,202 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:34,202 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:34,202 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:34,202 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of21ForFork0======== [2021-06-14 09:25:34,912 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:34,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:34,912 INFO L82 PathProgramCache]: Analyzing trace with hash -55373521, now seen corresponding path program 1 times [2021-06-14 09:25:34,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:34,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507458425] [2021-06-14 09:25:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:25:34,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:34,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507458425] [2021-06-14 09:25:34,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507458425] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:34,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:34,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:34,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595845134] [2021-06-14 09:25:34,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:34,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:34,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:34,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:34,921 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:34,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:34,921 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:34,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456 [2021-06-14 09:25:34,951 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:34,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1716577649, now seen corresponding path program 1 times [2021-06-14 09:25:34,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:34,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106047412] [2021-06-14 09:25:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:25:34,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:34,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106047412] [2021-06-14 09:25:34,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106047412] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:34,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:34,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:34,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642446585] [2021-06-14 09:25:34,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:34,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:34,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:34,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:34,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:34,967 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:34,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:34,967 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:34,967 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:35,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457 [2021-06-14 09:25:35,006 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:35,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:35,006 INFO L82 PathProgramCache]: Analyzing trace with hash -363628915, now seen corresponding path program 1 times [2021-06-14 09:25:35,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:35,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550068526] [2021-06-14 09:25:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:35,008 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:35,009 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:35,010 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:35,010 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:35,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458 [2021-06-14 09:25:35,010 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of21ForFork0 was UNSAFE (4/23) [2021-06-14 09:25:35,011 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:35,014 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:35,014 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:35,014 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:35,014 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:35,015 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:35,015 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:35,015 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:35,015 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread7of21ForFork0======== [2021-06-14 09:25:35,708 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:35,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:35,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1510608572, now seen corresponding path program 1 times [2021-06-14 09:25:35,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:35,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743316038] [2021-06-14 09:25:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:25:35,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:35,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743316038] [2021-06-14 09:25:35,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743316038] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:35,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:35,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:35,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650265867] [2021-06-14 09:25:35,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:35,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:35,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:35,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:35,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:35,718 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:35,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:35,718 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:35,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:35,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable459 [2021-06-14 09:25:35,752 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:35,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:35,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1896855043, now seen corresponding path program 1 times [2021-06-14 09:25:35,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:35,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294938623] [2021-06-14 09:25:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:25:35,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:35,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294938623] [2021-06-14 09:25:35,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294938623] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:35,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:35,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:35,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401977536] [2021-06-14 09:25:35,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:35,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:35,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:35,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:35,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:35,770 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:35,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:35,771 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:35,771 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:35,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:35,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460 [2021-06-14 09:25:35,809 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:35,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:35,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1895931522, now seen corresponding path program 1 times [2021-06-14 09:25:35,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:35,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482674829] [2021-06-14 09:25:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:35,812 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:35,814 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:35,815 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:35,815 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:35,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461 [2021-06-14 09:25:35,815 INFO L301 ceAbstractionStarter]: Result for error location fooThread7of21ForFork0 was UNSAFE (5/23) [2021-06-14 09:25:35,816 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:25:35,851 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:35,852 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:35,852 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:35,852 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:35,852 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:35,852 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:35,852 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:35,852 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:36,623 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (6/23) [2021-06-14 09:25:36,623 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:36,627 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:36,627 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:36,627 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:36,627 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:36,627 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:36,627 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:36,627 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:36,627 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of21ForFork0======== [2021-06-14 09:25:37,216 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:37,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1179743727, now seen corresponding path program 1 times [2021-06-14 09:25:37,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:37,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658308017] [2021-06-14 09:25:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:25:37,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:37,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658308017] [2021-06-14 09:25:37,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658308017] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:37,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:37,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:37,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116918169] [2021-06-14 09:25:37,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:37,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:37,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:37,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:37,224 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:37,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:37,224 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:37,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462 [2021-06-14 09:25:37,251 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:37,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:37,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2082648741, now seen corresponding path program 1 times [2021-06-14 09:25:37,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:37,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436980978] [2021-06-14 09:25:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:25:37,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:37,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436980978] [2021-06-14 09:25:37,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436980978] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:37,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:37,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:37,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86617455] [2021-06-14 09:25:37,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:37,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:37,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:37,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:37,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:37,262 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:37,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:37,262 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:37,262 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:37,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:37,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:37,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463 [2021-06-14 09:25:37,572 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:37,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:37,573 INFO L82 PathProgramCache]: Analyzing trace with hash 19728371, now seen corresponding path program 1 times [2021-06-14 09:25:37,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:37,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251403956] [2021-06-14 09:25:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:37,575 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:37,575 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:37,576 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:37,576 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:37,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464 [2021-06-14 09:25:37,577 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of21ForFork0 was UNSAFE (7/23) [2021-06-14 09:25:37,577 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:37,581 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:37,581 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:37,581 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:37,581 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:37,581 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:37,581 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:37,581 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:37,581 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of21ForFork0======== [2021-06-14 09:25:38,271 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:38,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:38,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1471532528, now seen corresponding path program 1 times [2021-06-14 09:25:38,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:38,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630148491] [2021-06-14 09:25:38,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:38,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:38,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630148491] [2021-06-14 09:25:38,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630148491] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:38,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:38,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:38,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798075834] [2021-06-14 09:25:38,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:38,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:38,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:38,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:38,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:38,279 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:38,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:38,279 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:38,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable465 [2021-06-14 09:25:38,433 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:38,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:38,434 INFO L82 PathProgramCache]: Analyzing trace with hash 524844719, now seen corresponding path program 1 times [2021-06-14 09:25:38,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:38,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661888108] [2021-06-14 09:25:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:38,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:38,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661888108] [2021-06-14 09:25:38,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661888108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:25:38,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386247393] [2021-06-14 09:25:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:25:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:38,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:25:38,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:25:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:38,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386247393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:25:38,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:25:38,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:25:38,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391838143] [2021-06-14 09:25:38,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:38,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:38,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:38,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:38,567 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:38,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:38,567 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:38,567 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:38,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-14 09:25:38,932 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:38,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:38,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1606306911, now seen corresponding path program 1 times [2021-06-14 09:25:38,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:38,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284499610] [2021-06-14 09:25:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:38,935 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:38,936 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:38,937 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:38,937 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:38,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467 [2021-06-14 09:25:38,937 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of21ForFork0 was UNSAFE (8/23) [2021-06-14 09:25:38,938 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:38,943 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:38,943 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:38,943 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:38,943 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:38,943 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:38,943 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:38,943 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:38,943 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread9of21ForFork0======== [2021-06-14 09:25:39,635 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:39,635 INFO L82 PathProgramCache]: Analyzing trace with hash 930199755, now seen corresponding path program 1 times [2021-06-14 09:25:39,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:39,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261281953] [2021-06-14 09:25:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:25:39,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:39,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261281953] [2021-06-14 09:25:39,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261281953] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:39,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:39,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:39,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128130996] [2021-06-14 09:25:39,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:39,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:39,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:39,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:39,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:39,645 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:39,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:39,645 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:39,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:39,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468 [2021-06-14 09:25:39,702 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:39,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1857215732, now seen corresponding path program 1 times [2021-06-14 09:25:39,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:39,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391792306] [2021-06-14 09:25:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:25:39,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:39,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391792306] [2021-06-14 09:25:39,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391792306] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:39,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:39,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:39,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179562189] [2021-06-14 09:25:39,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:39,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:39,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:39,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:39,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:39,714 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:39,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:39,714 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:39,715 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:39,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469 [2021-06-14 09:25:39,781 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:39,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2144348557, now seen corresponding path program 1 times [2021-06-14 09:25:39,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:39,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982929661] [2021-06-14 09:25:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:39,783 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:39,785 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:39,786 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:39,786 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:39,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470 [2021-06-14 09:25:39,787 INFO L301 ceAbstractionStarter]: Result for error location fooThread9of21ForFork0 was UNSAFE (9/23) [2021-06-14 09:25:39,787 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:39,791 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:39,791 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:39,791 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:39,791 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:39,791 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:39,791 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:39,791 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:39,791 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread15of21ForFork0======== [2021-06-14 09:25:40,525 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:40,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:40,525 INFO L82 PathProgramCache]: Analyzing trace with hash -365288059, now seen corresponding path program 1 times [2021-06-14 09:25:40,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:40,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413297060] [2021-06-14 09:25:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-06-14 09:25:40,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:40,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413297060] [2021-06-14 09:25:40,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413297060] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:40,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:40,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:40,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495158837] [2021-06-14 09:25:40,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:40,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:40,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:40,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:40,535 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:40,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:40,535 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:40,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471 [2021-06-14 09:25:40,629 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash 988021638, now seen corresponding path program 1 times [2021-06-14 09:25:40,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:40,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132634855] [2021-06-14 09:25:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-06-14 09:25:40,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:40,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132634855] [2021-06-14 09:25:40,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132634855] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:40,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:40,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:40,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914404057] [2021-06-14 09:25:40,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:40,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:40,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:40,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:40,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:40,645 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:40,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:40,645 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:40,645 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:40,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472 [2021-06-14 09:25:40,742 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:40,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:40,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1799393849, now seen corresponding path program 1 times [2021-06-14 09:25:40,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:40,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163645258] [2021-06-14 09:25:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:40,745 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:40,746 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:40,748 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:40,748 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:40,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473 [2021-06-14 09:25:40,749 INFO L301 ceAbstractionStarter]: Result for error location fooThread15of21ForFork0 was UNSAFE (10/23) [2021-06-14 09:25:40,749 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:25:40,762 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:40,762 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:40,762 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:40,762 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:40,762 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:40,762 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:40,762 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:40,762 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread14of21ForFork0======== Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:41,715 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:41,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:41,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1596305351, now seen corresponding path program 1 times [2021-06-14 09:25:41,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:41,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608319755] [2021-06-14 09:25:41,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:25:41,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:41,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608319755] [2021-06-14 09:25:41,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608319755] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:41,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:41,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:41,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690719101] [2021-06-14 09:25:41,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:41,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:41,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:41,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:41,726 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:41,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:41,726 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:41,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474 [2021-06-14 09:25:41,803 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:41,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:41,803 INFO L82 PathProgramCache]: Analyzing trace with hash -242995654, now seen corresponding path program 1 times [2021-06-14 09:25:41,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:41,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572829208] [2021-06-14 09:25:41,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:25:41,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:41,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572829208] [2021-06-14 09:25:41,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572829208] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:41,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:41,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:41,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486722858] [2021-06-14 09:25:41,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:41,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:41,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:41,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:41,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:41,830 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:41,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:41,830 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:41,830 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:41,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475 [2021-06-14 09:25:41,931 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:41,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:41,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1264556155, now seen corresponding path program 1 times [2021-06-14 09:25:41,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:41,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817431590] [2021-06-14 09:25:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:41,934 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:41,935 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:41,936 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:41,936 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:41,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable476 [2021-06-14 09:25:41,937 INFO L301 ceAbstractionStarter]: Result for error location fooThread14of21ForFork0 was UNSAFE (11/23) [2021-06-14 09:25:41,937 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:41,941 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:41,941 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:41,941 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:41,941 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:41,941 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:41,941 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:41,941 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:41,941 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread12of21ForFork0======== [2021-06-14 09:25:42,666 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:42,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:42,666 INFO L82 PathProgramCache]: Analyzing trace with hash 658210212, now seen corresponding path program 1 times [2021-06-14 09:25:42,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:42,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397837293] [2021-06-14 09:25:42,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:25:42,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:42,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397837293] [2021-06-14 09:25:42,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397837293] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:42,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:42,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:42,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123663737] [2021-06-14 09:25:42,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:42,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:42,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:42,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:42,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:42,678 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:42,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:42,678 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:42,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:42,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable477 [2021-06-14 09:25:42,749 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:42,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2011519909, now seen corresponding path program 1 times [2021-06-14 09:25:42,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:42,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567748677] [2021-06-14 09:25:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:25:42,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:42,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567748677] [2021-06-14 09:25:42,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567748677] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:42,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:42,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:42,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467922928] [2021-06-14 09:25:42,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:42,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:42,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:42,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:42,768 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:42,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:42,768 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:42,768 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:42,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478 [2021-06-14 09:25:42,852 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:42,853 INFO L82 PathProgramCache]: Analyzing trace with hash -775895578, now seen corresponding path program 1 times [2021-06-14 09:25:42,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:42,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712530000] [2021-06-14 09:25:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:42,856 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:42,858 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:42,859 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:42,860 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:42,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479 [2021-06-14 09:25:42,860 INFO L301 ceAbstractionStarter]: Result for error location fooThread12of21ForFork0 was UNSAFE (12/23) [2021-06-14 09:25:42,860 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:25:42,886 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:42,886 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:42,886 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:42,886 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:42,886 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:42,886 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:42,886 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:42,886 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread16of21ForFork0======== Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:43,672 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:43,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1710542741, now seen corresponding path program 1 times [2021-06-14 09:25:43,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:43,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741561859] [2021-06-14 09:25:43,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:25:43,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:43,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741561859] [2021-06-14 09:25:43,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741561859] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:43,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:43,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:43,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006491721] [2021-06-14 09:25:43,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:43,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:43,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:43,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:43,690 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:43,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:43,690 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:43,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:43,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480 [2021-06-14 09:25:43,905 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:43,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1339660074, now seen corresponding path program 1 times [2021-06-14 09:25:43,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:43,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823616709] [2021-06-14 09:25:43,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:25:43,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:43,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823616709] [2021-06-14 09:25:43,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823616709] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:43,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:43,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:43,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28195373] [2021-06-14 09:25:43,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:43,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:43,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:43,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:43,922 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:43,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:43,922 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:43,922 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:44,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481 [2021-06-14 09:25:44,063 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:44,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:44,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1128309161, now seen corresponding path program 1 times [2021-06-14 09:25:44,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:44,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622638987] [2021-06-14 09:25:44,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:44,067 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:44,070 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:44,072 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:44,072 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:44,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482 [2021-06-14 09:25:44,073 INFO L301 ceAbstractionStarter]: Result for error location fooThread16of21ForFork0 was UNSAFE (13/23) [2021-06-14 09:25:44,073 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:44,081 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:44,081 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:44,081 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:44,081 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:44,081 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:44,081 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:44,081 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:44,081 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread13of21ForFork0======== [2021-06-14 09:25:44,866 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:44,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:44,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1765618897, now seen corresponding path program 1 times [2021-06-14 09:25:44,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:44,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904225909] [2021-06-14 09:25:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:25:44,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:44,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904225909] [2021-06-14 09:25:44,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904225909] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:44,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:44,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:44,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843066348] [2021-06-14 09:25:44,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:44,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:44,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:44,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:44,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:44,876 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:44,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:44,876 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:44,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483 [2021-06-14 09:25:44,955 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:44,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:44,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1684876528, now seen corresponding path program 1 times [2021-06-14 09:25:44,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:44,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276219954] [2021-06-14 09:25:44,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:25:44,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:44,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276219954] [2021-06-14 09:25:44,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276219954] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:44,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:44,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:44,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187545377] [2021-06-14 09:25:44,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:44,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:44,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:44,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:44,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:44,977 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:44,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:44,977 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:44,977 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:45,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484 [2021-06-14 09:25:45,079 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:45,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:45,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1256781071, now seen corresponding path program 1 times [2021-06-14 09:25:45,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:45,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325299605] [2021-06-14 09:25:45,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:45,082 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:45,083 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:45,085 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:45,085 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:45,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485 [2021-06-14 09:25:45,085 INFO L301 ceAbstractionStarter]: Result for error location fooThread13of21ForFork0 was UNSAFE (14/23) [2021-06-14 09:25:45,085 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:45,089 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:45,089 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:45,089 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:45,089 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:45,089 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:45,089 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:45,089 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:45,089 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread17of21ForFork0======== [2021-06-14 09:25:45,895 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:45,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1874153573, now seen corresponding path program 1 times [2021-06-14 09:25:45,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:45,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293496376] [2021-06-14 09:25:45,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-06-14 09:25:45,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:45,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293496376] [2021-06-14 09:25:45,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293496376] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:45,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:45,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:45,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144336085] [2021-06-14 09:25:45,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:45,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:45,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:45,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:45,906 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:45,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:45,906 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:46,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable486 [2021-06-14 09:25:46,016 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:46,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:46,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1459199706, now seen corresponding path program 1 times [2021-06-14 09:25:46,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:46,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806588649] [2021-06-14 09:25:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-06-14 09:25:46,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:46,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806588649] [2021-06-14 09:25:46,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806588649] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:46,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:46,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:46,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999018390] [2021-06-14 09:25:46,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:46,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:46,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:46,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:46,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:46,033 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:46,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:46,033 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:46,033 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:46,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487 [2021-06-14 09:25:46,164 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:46,164 INFO L82 PathProgramCache]: Analyzing trace with hash 758558247, now seen corresponding path program 1 times [2021-06-14 09:25:46,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:46,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915803038] [2021-06-14 09:25:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:46,168 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:46,170 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:46,171 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:46,172 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:46,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable488 [2021-06-14 09:25:46,172 INFO L301 ceAbstractionStarter]: Result for error location fooThread17of21ForFork0 was UNSAFE (15/23) [2021-06-14 09:25:46,172 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:46,183 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:46,183 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:46,183 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:46,183 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:46,183 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:46,183 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:46,183 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:46,184 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread10of21ForFork0======== [2021-06-14 09:25:47,002 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:47,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:47,002 INFO L82 PathProgramCache]: Analyzing trace with hash 488528275, now seen corresponding path program 1 times [2021-06-14 09:25:47,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:47,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357226580] [2021-06-14 09:25:47,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:25:47,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:47,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357226580] [2021-06-14 09:25:47,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357226580] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:47,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:47,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:47,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347501190] [2021-06-14 09:25:47,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:47,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:47,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:47,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:47,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:47,014 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:47,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:47,014 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:47,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489 [2021-06-14 09:25:47,077 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:47,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1841837972, now seen corresponding path program 1 times [2021-06-14 09:25:47,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:47,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867182704] [2021-06-14 09:25:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:25:47,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:47,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867182704] [2021-06-14 09:25:47,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867182704] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:47,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:47,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:47,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655474300] [2021-06-14 09:25:47,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:47,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:47,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:47,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:47,113 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:47,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:47,113 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:47,113 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:47,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:47,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:47,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490 [2021-06-14 09:25:47,187 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:47,187 INFO L82 PathProgramCache]: Analyzing trace with hash -945577515, now seen corresponding path program 1 times [2021-06-14 09:25:47,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:47,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738857222] [2021-06-14 09:25:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:47,189 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:47,191 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:47,192 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:47,192 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:47,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491 [2021-06-14 09:25:47,193 INFO L301 ceAbstractionStarter]: Result for error location fooThread10of21ForFork0 was UNSAFE (16/23) [2021-06-14 09:25:47,193 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:47,209 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:47,209 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:47,209 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:47,209 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:47,209 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:47,209 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:47,209 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:47,209 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread18of21ForFork0======== [2021-06-14 09:25:48,040 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:48,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:48,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1913972854, now seen corresponding path program 1 times [2021-06-14 09:25:48,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:48,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445474431] [2021-06-14 09:25:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-06-14 09:25:48,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:48,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445474431] [2021-06-14 09:25:48,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445474431] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:48,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:48,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:48,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219076040] [2021-06-14 09:25:48,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:48,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:48,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:48,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:48,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:48,051 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:48,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:48,051 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:48,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492 [2021-06-14 09:25:48,181 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:48,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2030194505, now seen corresponding path program 1 times [2021-06-14 09:25:48,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:48,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968278077] [2021-06-14 09:25:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-06-14 09:25:48,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:48,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968278077] [2021-06-14 09:25:48,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968278077] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:48,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:48,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:48,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447485589] [2021-06-14 09:25:48,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:48,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:48,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:48,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:48,196 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:48,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:48,196 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:48,196 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:48,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493 [2021-06-14 09:25:48,345 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:48,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1337092808, now seen corresponding path program 1 times [2021-06-14 09:25:48,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:48,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978848318] [2021-06-14 09:25:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:48,348 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:48,351 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:48,353 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:48,353 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:48,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494 [2021-06-14 09:25:48,353 INFO L301 ceAbstractionStarter]: Result for error location fooThread18of21ForFork0 was UNSAFE (17/23) [2021-06-14 09:25:48,353 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:48,358 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:48,358 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:48,358 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:48,358 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:48,358 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:48,358 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:48,358 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:48,358 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:25:49,015 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:25:49,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:49,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1574286512, now seen corresponding path program 1 times [2021-06-14 09:25:49,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:49,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722669432] [2021-06-14 09:25:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:49,019 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:49,020 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:49,021 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:49,022 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:49,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495 [2021-06-14 09:25:49,022 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (18/23) [2021-06-14 09:25:49,022 WARN L243 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:25:49,022 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2021-06-14 09:25:49,043 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:25:49,044 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:49,047 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:49,047 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:49,047 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:49,047 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:49,047 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:49,047 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:49,047 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:49,048 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of22ForFork0======== [2021-06-14 09:25:49,803 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:49,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:49,803 INFO L82 PathProgramCache]: Analyzing trace with hash 639590323, now seen corresponding path program 1 times [2021-06-14 09:25:49,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:49,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049513306] [2021-06-14 09:25:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:25:49,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:49,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049513306] [2021-06-14 09:25:49,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049513306] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:49,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:49,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:49,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586325178] [2021-06-14 09:25:49,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:49,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:49,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:49,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:49,812 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:49,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:49,812 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:49,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable496 [2021-06-14 09:25:49,844 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:49,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1647534986, now seen corresponding path program 1 times [2021-06-14 09:25:49,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:49,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385400032] [2021-06-14 09:25:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:25:49,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:49,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385400032] [2021-06-14 09:25:49,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385400032] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:49,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:49,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:49,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719150484] [2021-06-14 09:25:49,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:49,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:49,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:49,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:49,856 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:49,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:49,856 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:49,856 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:49,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable497 [2021-06-14 09:25:49,900 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:49,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:49,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1561860240, now seen corresponding path program 1 times [2021-06-14 09:25:49,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:49,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546928799] [2021-06-14 09:25:49,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:49,902 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:49,903 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:49,903 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:49,903 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:49,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable498 [2021-06-14 09:25:49,904 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of22ForFork0 was UNSAFE (1/24) [2021-06-14 09:25:49,904 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:49,909 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:49,909 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:49,909 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:49,909 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:49,909 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:49,909 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:49,909 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:49,909 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of22ForFork0======== [2021-06-14 09:25:50,719 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:50,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:50,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1805009970, now seen corresponding path program 1 times [2021-06-14 09:25:50,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:50,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298582948] [2021-06-14 09:25:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:25:50,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:50,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298582948] [2021-06-14 09:25:50,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298582948] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:50,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:50,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:50,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066660217] [2021-06-14 09:25:50,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:50,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:50,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:50,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:50,727 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:50,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:50,727 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:50,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable499 [2021-06-14 09:25:50,760 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:50,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:50,761 INFO L82 PathProgramCache]: Analyzing trace with hash -120732613, now seen corresponding path program 1 times [2021-06-14 09:25:50,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:50,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326444414] [2021-06-14 09:25:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:25:50,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:50,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326444414] [2021-06-14 09:25:50,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326444414] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:50,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:50,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:50,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397473111] [2021-06-14 09:25:50,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:50,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:50,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:50,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:50,773 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:50,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:50,773 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:50,773 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:50,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500 [2021-06-14 09:25:50,813 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:50,814 INFO L82 PathProgramCache]: Analyzing trace with hash -59870195, now seen corresponding path program 1 times [2021-06-14 09:25:50,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:50,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135038515] [2021-06-14 09:25:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:50,816 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:50,816 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:50,817 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:50,817 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:50,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501 [2021-06-14 09:25:50,817 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of22ForFork0 was UNSAFE (2/24) [2021-06-14 09:25:50,818 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:50,821 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:50,821 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:50,821 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:50,821 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:50,821 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:50,821 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:50,821 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:50,821 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of22ForFork0======== [2021-06-14 09:25:51,501 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:51,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:51,502 INFO L82 PathProgramCache]: Analyzing trace with hash -322688549, now seen corresponding path program 1 times [2021-06-14 09:25:51,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:51,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513970405] [2021-06-14 09:25:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:25:51,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:51,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513970405] [2021-06-14 09:25:51,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513970405] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:51,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:51,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:51,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573776951] [2021-06-14 09:25:51,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:51,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:51,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:51,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:51,511 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:51,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:51,511 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:51,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502 [2021-06-14 09:25:51,537 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:51,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:51,537 INFO L82 PathProgramCache]: Analyzing trace with hash -321765028, now seen corresponding path program 1 times [2021-06-14 09:25:51,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:51,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68073042] [2021-06-14 09:25:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:25:51,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:51,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68073042] [2021-06-14 09:25:51,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68073042] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:51,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:51,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:51,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035449029] [2021-06-14 09:25:51,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:51,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:51,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:51,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:51,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:51,549 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:51,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:51,549 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:51,549 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:51,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:51,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:51,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503 [2021-06-14 09:25:51,578 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:51,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:51,579 INFO L82 PathProgramCache]: Analyzing trace with hash -321764067, now seen corresponding path program 1 times [2021-06-14 09:25:51,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:51,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596508078] [2021-06-14 09:25:51,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:51,581 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:51,582 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:51,583 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:51,583 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:51,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504 [2021-06-14 09:25:51,584 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of22ForFork0 was UNSAFE (3/24) [2021-06-14 09:25:51,584 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:51,600 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:51,600 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:51,601 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:51,601 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:51,601 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:51,601 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:51,601 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:51,601 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of22ForFork0======== [2021-06-14 09:25:52,267 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:52,267 INFO L82 PathProgramCache]: Analyzing trace with hash -314816790, now seen corresponding path program 1 times [2021-06-14 09:25:52,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:52,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131774049] [2021-06-14 09:25:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:25:52,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:52,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131774049] [2021-06-14 09:25:52,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131774049] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:52,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:52,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:52,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623432671] [2021-06-14 09:25:52,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:52,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:52,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:52,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:52,275 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:52,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:52,276 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:52,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:52,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505 [2021-06-14 09:25:52,305 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1169384033, now seen corresponding path program 1 times [2021-06-14 09:25:52,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:52,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128695882] [2021-06-14 09:25:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:25:52,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:52,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128695882] [2021-06-14 09:25:52,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128695882] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:52,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:52,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:52,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611022428] [2021-06-14 09:25:52,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:52,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:52,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:52,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:52,317 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:52,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:52,317 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:52,317 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:52,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506 [2021-06-14 09:25:52,700 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:52,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:52,700 INFO L82 PathProgramCache]: Analyzing trace with hash 304631462, now seen corresponding path program 1 times [2021-06-14 09:25:52,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:52,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527740598] [2021-06-14 09:25:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:52,702 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:52,703 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:52,704 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:52,704 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:52,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507 [2021-06-14 09:25:52,817 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of22ForFork0 was UNSAFE (4/24) [2021-06-14 09:25:52,817 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:52,824 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:52,824 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:52,824 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:52,824 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:52,824 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:52,824 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:52,824 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:52,824 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of22ForFork0======== [2021-06-14 09:25:53,542 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:53,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:53,543 INFO L82 PathProgramCache]: Analyzing trace with hash 932615172, now seen corresponding path program 1 times [2021-06-14 09:25:53,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:53,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704287606] [2021-06-14 09:25:53,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:25:53,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:53,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704287606] [2021-06-14 09:25:53,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704287606] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:53,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:53,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:53,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092555467] [2021-06-14 09:25:53,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:53,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:53,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:53,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:53,556 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:53,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:53,556 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:53,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508 [2021-06-14 09:25:53,593 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:53,594 INFO L82 PathProgramCache]: Analyzing trace with hash -874839291, now seen corresponding path program 1 times [2021-06-14 09:25:53,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:53,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980992783] [2021-06-14 09:25:53,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:25:53,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:53,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980992783] [2021-06-14 09:25:53,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980992783] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:53,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:53,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:53,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428647790] [2021-06-14 09:25:53,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:53,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:53,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:53,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:53,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:53,606 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:53,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:53,606 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:53,606 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:53,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509 [2021-06-14 09:25:53,646 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:53,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:53,647 INFO L82 PathProgramCache]: Analyzing trace with hash 12664390, now seen corresponding path program 1 times [2021-06-14 09:25:53,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:53,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745517206] [2021-06-14 09:25:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:53,649 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:53,651 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:53,652 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:53,652 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:53,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable510 [2021-06-14 09:25:53,653 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of22ForFork0 was UNSAFE (5/24) [2021-06-14 09:25:53,653 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:53,657 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:53,657 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:53,657 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:53,657 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:53,657 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:53,657 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:53,657 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:53,657 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread19of22ForFork0======== [2021-06-14 09:25:54,498 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:54,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:54,498 INFO L82 PathProgramCache]: Analyzing trace with hash -915595141, now seen corresponding path program 1 times [2021-06-14 09:25:54,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:54,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798982182] [2021-06-14 09:25:54,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-06-14 09:25:54,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:54,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798982182] [2021-06-14 09:25:54,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798982182] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:54,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:54,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:54,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801736109] [2021-06-14 09:25:54,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:54,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:54,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:54,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:54,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:54,511 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:54,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:54,511 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:54,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511 [2021-06-14 09:25:54,595 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:54,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1582420796, now seen corresponding path program 1 times [2021-06-14 09:25:54,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:54,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426663877] [2021-06-14 09:25:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-06-14 09:25:54,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:54,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426663877] [2021-06-14 09:25:54,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426663877] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:54,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:54,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:54,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354320637] [2021-06-14 09:25:54,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:54,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:54,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:54,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:54,609 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:54,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:54,609 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:54,609 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:54,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:54,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512 [2021-06-14 09:25:54,712 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:54,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:54,712 INFO L82 PathProgramCache]: Analyzing trace with hash -225033667, now seen corresponding path program 1 times [2021-06-14 09:25:54,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:54,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727952320] [2021-06-14 09:25:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:54,716 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:54,717 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:54,719 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:54,719 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:54,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513 [2021-06-14 09:25:54,720 INFO L301 ceAbstractionStarter]: Result for error location fooThread19of22ForFork0 was UNSAFE (6/24) [2021-06-14 09:25:54,720 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:25:54,754 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:54,754 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:54,754 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:54,754 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:54,754 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:54,754 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:54,754 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:54,754 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:55,501 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (7/24) [2021-06-14 09:25:55,501 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:25:55,521 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:55,521 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:55,521 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:55,522 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:55,522 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:55,522 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:55,522 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:55,522 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of22ForFork0======== Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:56,364 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:56,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:56,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1887826826, now seen corresponding path program 1 times [2021-06-14 09:25:56,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:56,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715747678] [2021-06-14 09:25:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:25:56,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:56,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715747678] [2021-06-14 09:25:56,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715747678] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:56,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:56,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:56,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862873436] [2021-06-14 09:25:56,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:56,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:56,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:56,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:56,373 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:56,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:56,373 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:56,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514 [2021-06-14 09:25:56,420 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:56,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:56,420 INFO L82 PathProgramCache]: Analyzing trace with hash 610189111, now seen corresponding path program 1 times [2021-06-14 09:25:56,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:56,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244993965] [2021-06-14 09:25:56,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:25:56,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:56,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244993965] [2021-06-14 09:25:56,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244993965] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:56,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:56,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:56,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823870954] [2021-06-14 09:25:56,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:56,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:56,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:56,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:56,432 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:56,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:56,432 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:56,433 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:56,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:56,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:56,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515 [2021-06-14 09:25:56,486 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:56,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1197265352, now seen corresponding path program 1 times [2021-06-14 09:25:56,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:56,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983093807] [2021-06-14 09:25:56,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:56,489 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:56,490 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:56,491 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:56,491 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:56,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516 [2021-06-14 09:25:56,492 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of22ForFork0 was UNSAFE (8/24) [2021-06-14 09:25:56,492 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:56,497 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:56,497 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:56,497 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:56,497 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:56,497 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:56,497 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:56,497 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:56,497 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of22ForFork0======== [2021-06-14 09:25:57,129 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:57,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:57,130 INFO L82 PathProgramCache]: Analyzing trace with hash -433934905, now seen corresponding path program 1 times [2021-06-14 09:25:57,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:57,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998615005] [2021-06-14 09:25:57,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:57,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:57,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998615005] [2021-06-14 09:25:57,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998615005] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:57,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:57,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:25:57,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658997009] [2021-06-14 09:25:57,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:57,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:57,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:57,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:57,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:57,138 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:57,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:57,138 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:57,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:57,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517 [2021-06-14 09:25:57,324 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:57,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:57,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1441810839, now seen corresponding path program 1 times [2021-06-14 09:25:57,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:57,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006616551] [2021-06-14 09:25:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:57,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:57,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006616551] [2021-06-14 09:25:57,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006616551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:25:57,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236707373] [2021-06-14 09:25:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:25:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:57,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:25:57,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:25:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:25:57,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236707373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:25:57,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:25:57,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:25:57,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159013745] [2021-06-14 09:25:57,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:57,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:57,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:57,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:57,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:57,466 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:57,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:57,466 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:57,466 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:57,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-06-14 09:25:57,873 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:57,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:57,873 INFO L82 PathProgramCache]: Analyzing trace with hash -478584720, now seen corresponding path program 1 times [2021-06-14 09:25:57,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:57,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956971479] [2021-06-14 09:25:57,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:57,876 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:57,876 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:57,877 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:57,877 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:57,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519 [2021-06-14 09:25:57,878 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of22ForFork0 was UNSAFE (9/24) [2021-06-14 09:25:57,878 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:57,882 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:57,882 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:57,882 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:57,882 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:57,882 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:57,882 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:57,882 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:57,882 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread7of22ForFork0======== [2021-06-14 09:25:58,622 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:58,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:58,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1992816018, now seen corresponding path program 1 times [2021-06-14 09:25:58,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:58,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122442510] [2021-06-14 09:25:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:25:58,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:58,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122442510] [2021-06-14 09:25:58,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122442510] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:58,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:58,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:58,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695438102] [2021-06-14 09:25:58,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:58,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:58,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:58,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:58,633 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:58,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:58,633 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:58,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable520 [2021-06-14 09:25:58,691 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:58,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:58,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2008748271, now seen corresponding path program 1 times [2021-06-14 09:25:58,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:58,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823584723] [2021-06-14 09:25:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:25:58,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:58,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823584723] [2021-06-14 09:25:58,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823584723] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:58,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:58,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:58,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230659320] [2021-06-14 09:25:58,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:58,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:58,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:58,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:58,705 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:58,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:58,705 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:58,705 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:58,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable521 [2021-06-14 09:25:58,759 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:58,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:58,759 INFO L82 PathProgramCache]: Analyzing trace with hash 211796912, now seen corresponding path program 1 times [2021-06-14 09:25:58,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:58,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767871406] [2021-06-14 09:25:58,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:58,761 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:58,762 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:58,763 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:58,763 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:58,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522 [2021-06-14 09:25:58,764 INFO L301 ceAbstractionStarter]: Result for error location fooThread7of22ForFork0 was UNSAFE (10/24) [2021-06-14 09:25:58,764 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:58,768 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:58,768 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:58,768 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:58,768 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:58,768 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:58,768 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:58,768 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:58,768 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread9of22ForFork0======== [2021-06-14 09:25:59,640 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:59,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:59,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1791906947, now seen corresponding path program 1 times [2021-06-14 09:25:59,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:59,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482219888] [2021-06-14 09:25:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:25:59,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:59,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482219888] [2021-06-14 09:25:59,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482219888] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:59,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:59,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:25:59,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69572216] [2021-06-14 09:25:59,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:25:59,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:59,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:25:59,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:25:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:59,650 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:59,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:59,650 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:59,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523 [2021-06-14 09:25:59,721 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:59,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:59,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1149750652, now seen corresponding path program 1 times [2021-06-14 09:25:59,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:59,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475581904] [2021-06-14 09:25:59,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:25:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:25:59,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:25:59,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475581904] [2021-06-14 09:25:59,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475581904] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:25:59,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:25:59,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:25:59,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956239933] [2021-06-14 09:25:59,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:25:59,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:25:59,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:25:59,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:25:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:59,734 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:25:59,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:25:59,734 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:59,734 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:25:59,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:25:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:25:59,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524 [2021-06-14 09:25:59,804 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:25:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:25:59,804 INFO L82 PathProgramCache]: Analyzing trace with hash 357801157, now seen corresponding path program 1 times [2021-06-14 09:25:59,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:25:59,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408745917] [2021-06-14 09:25:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:25:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:59,807 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:25:59,808 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:25:59,809 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:25:59,809 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:25:59,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525 [2021-06-14 09:25:59,809 INFO L301 ceAbstractionStarter]: Result for error location fooThread9of22ForFork0 was UNSAFE (11/24) [2021-06-14 09:25:59,809 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:25:59,813 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:25:59,813 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:25:59,813 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:25:59,813 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:25:59,813 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:25:59,813 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:25:59,813 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:25:59,813 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread14of22ForFork0======== [2021-06-14 09:26:00,634 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:00,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:00,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1742181435, now seen corresponding path program 1 times [2021-06-14 09:26:00,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:00,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143225939] [2021-06-14 09:26:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:26:00,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:00,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143225939] [2021-06-14 09:26:00,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143225939] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:00,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:00,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:00,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216255023] [2021-06-14 09:26:00,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:00,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:00,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:00,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:00,645 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:00,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:00,645 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:00,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526 [2021-06-14 09:26:00,734 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:00,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:00,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1708313990, now seen corresponding path program 1 times [2021-06-14 09:26:00,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:00,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979822188] [2021-06-14 09:26:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:26:00,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:00,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979822188] [2021-06-14 09:26:00,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979822188] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:00,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:00,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:00,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142231734] [2021-06-14 09:26:00,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:00,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:00,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:00,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:00,747 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:00,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:00,747 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:00,748 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:00,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527 [2021-06-14 09:26:00,851 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:00,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:00,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1233343609, now seen corresponding path program 1 times [2021-06-14 09:26:00,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:00,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559312900] [2021-06-14 09:26:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:00,855 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:00,856 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:00,858 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:00,858 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:00,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528 [2021-06-14 09:26:00,858 INFO L301 ceAbstractionStarter]: Result for error location fooThread14of22ForFork0 was UNSAFE (12/24) [2021-06-14 09:26:00,858 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:00,862 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:00,862 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:00,862 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:00,862 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:00,862 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:00,862 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:00,862 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:00,862 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread12of22ForFork0======== [2021-06-14 09:26:01,669 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:01,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1890048472, now seen corresponding path program 1 times [2021-06-14 09:26:01,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:01,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274865044] [2021-06-14 09:26:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:26:01,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:01,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274865044] [2021-06-14 09:26:01,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274865044] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:01,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:01,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:01,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295624657] [2021-06-14 09:26:01,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:01,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:01,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:01,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:01,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:01,691 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:01,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:01,691 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:01,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:01,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529 [2021-06-14 09:26:01,772 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1560446953, now seen corresponding path program 1 times [2021-06-14 09:26:01,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:01,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859859600] [2021-06-14 09:26:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:26:01,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:01,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859859600] [2021-06-14 09:26:01,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859859600] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:01,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:01,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:01,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352802978] [2021-06-14 09:26:01,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:01,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:01,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:01,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:01,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:01,785 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:01,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:01,785 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:01,785 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:01,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530 [2021-06-14 09:26:01,988 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:01,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:01,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1381210646, now seen corresponding path program 1 times [2021-06-14 09:26:01,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:01,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747158325] [2021-06-14 09:26:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:01,992 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:01,993 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:01,996 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:01,996 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:01,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable531 [2021-06-14 09:26:01,997 INFO L301 ceAbstractionStarter]: Result for error location fooThread12of22ForFork0 was UNSAFE (13/24) [2021-06-14 09:26:01,997 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:02,003 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:02,003 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:02,003 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:02,003 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:02,003 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:02,003 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:02,004 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:02,004 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread13of22ForFork0======== [2021-06-14 09:26:02,829 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:02,829 INFO L82 PathProgramCache]: Analyzing trace with hash -245916617, now seen corresponding path program 1 times [2021-06-14 09:26:02,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:02,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170626304] [2021-06-14 09:26:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:26:02,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:02,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170626304] [2021-06-14 09:26:02,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170626304] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:02,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:02,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:02,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998177401] [2021-06-14 09:26:02,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:02,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:02,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:02,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:02,840 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:02,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:02,840 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:02,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:02,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable532 [2021-06-14 09:26:02,933 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:02,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:02,933 INFO L82 PathProgramCache]: Analyzing trace with hash -34565704, now seen corresponding path program 1 times [2021-06-14 09:26:02,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:02,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227663617] [2021-06-14 09:26:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:26:02,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:02,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227663617] [2021-06-14 09:26:02,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227663617] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:02,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:02,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:02,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873773029] [2021-06-14 09:26:02,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:02,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:02,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:02,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:02,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:02,947 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:02,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:02,947 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:02,947 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:03,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:03,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:03,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533 [2021-06-14 09:26:03,052 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:03,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:03,052 INFO L82 PathProgramCache]: Analyzing trace with hash -879037575, now seen corresponding path program 1 times [2021-06-14 09:26:03,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:03,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164734630] [2021-06-14 09:26:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:03,055 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:03,057 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:03,059 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:03,059 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:03,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534 [2021-06-14 09:26:03,060 INFO L301 ceAbstractionStarter]: Result for error location fooThread13of22ForFork0 was UNSAFE (14/24) [2021-06-14 09:26:03,060 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:03,070 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:03,070 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:03,070 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:03,070 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:03,070 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:03,070 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:03,070 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:03,070 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread11of22ForFork0======== [2021-06-14 09:26:03,875 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:03,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:03,875 INFO L82 PathProgramCache]: Analyzing trace with hash -29103877, now seen corresponding path program 1 times [2021-06-14 09:26:03,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:03,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472730957] [2021-06-14 09:26:03,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:26:03,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:03,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472730957] [2021-06-14 09:26:03,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472730957] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:03,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:03,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:03,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875159244] [2021-06-14 09:26:03,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:03,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:03,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:03,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:03,889 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:03,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:03,889 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:03,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable535 [2021-06-14 09:26:03,964 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:03,964 INFO L82 PathProgramCache]: Analyzing trace with hash -873575748, now seen corresponding path program 1 times [2021-06-14 09:26:03,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:03,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151113636] [2021-06-14 09:26:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:26:03,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:03,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151113636] [2021-06-14 09:26:03,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151113636] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:03,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:03,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:03,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116033175] [2021-06-14 09:26:03,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:03,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:03,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:03,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:03,979 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:03,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:03,979 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:03,979 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:04,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:04,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable536 [2021-06-14 09:26:04,062 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:04,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:04,062 INFO L82 PathProgramCache]: Analyzing trace with hash 479733949, now seen corresponding path program 1 times [2021-06-14 09:26:04,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:04,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210275392] [2021-06-14 09:26:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:04,065 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:04,066 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:04,068 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:04,068 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:04,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537 [2021-06-14 09:26:04,069 INFO L301 ceAbstractionStarter]: Result for error location fooThread11of22ForFork0 was UNSAFE (15/24) [2021-06-14 09:26:04,069 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:26:04,095 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:04,095 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:04,095 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:04,095 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:04,095 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:04,095 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:04,095 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:04,095 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread15of22ForFork0======== Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:05,278 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:05,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:05,278 INFO L82 PathProgramCache]: Analyzing trace with hash 539548473, now seen corresponding path program 1 times [2021-06-14 09:26:05,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:05,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062930380] [2021-06-14 09:26:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-06-14 09:26:05,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:05,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062930380] [2021-06-14 09:26:05,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062930380] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:05,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:05,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:05,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523670598] [2021-06-14 09:26:05,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:05,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:05,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:05,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:05,288 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:05,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:05,288 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:05,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:05,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538 [2021-06-14 09:26:05,402 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:05,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:05,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1501162490, now seen corresponding path program 1 times [2021-06-14 09:26:05,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:05,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304103661] [2021-06-14 09:26:05,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-06-14 09:26:05,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:05,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304103661] [2021-06-14 09:26:05,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304103661] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:05,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:05,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:05,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719600426] [2021-06-14 09:26:05,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:05,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:05,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:05,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:05,443 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:05,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:05,443 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:05,443 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:05,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:05,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:05,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539 [2021-06-14 09:26:05,579 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:05,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:05,579 INFO L82 PathProgramCache]: Analyzing trace with hash -576046853, now seen corresponding path program 1 times [2021-06-14 09:26:05,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:05,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928162110] [2021-06-14 09:26:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:05,583 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:05,584 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:05,586 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:05,586 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:05,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540 [2021-06-14 09:26:05,587 INFO L301 ceAbstractionStarter]: Result for error location fooThread15of22ForFork0 was UNSAFE (16/24) [2021-06-14 09:26:05,587 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:05,591 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:05,591 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:05,591 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:05,591 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:05,591 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:05,591 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:05,591 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:05,591 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread22of22ForFork0======== [2021-06-14 09:26:06,564 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:06,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:06,564 INFO L82 PathProgramCache]: Analyzing trace with hash 123471463, now seen corresponding path program 1 times [2021-06-14 09:26:06,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:06,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918534811] [2021-06-14 09:26:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-06-14 09:26:06,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:06,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918534811] [2021-06-14 09:26:06,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918534811] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:06,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:06,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:06,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650857506] [2021-06-14 09:26:06,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:06,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:06,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:06,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:06,575 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:06,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:06,575 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:06,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541 [2021-06-14 09:26:06,741 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:06,741 INFO L82 PathProgramCache]: Analyzing trace with hash 474271400, now seen corresponding path program 1 times [2021-06-14 09:26:06,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:06,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144501203] [2021-06-14 09:26:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-06-14 09:26:06,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:06,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144501203] [2021-06-14 09:26:06,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144501203] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:06,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:06,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:06,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483437812] [2021-06-14 09:26:06,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:06,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:06,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:06,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:06,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:06,756 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:06,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:06,756 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:06,756 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:06,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:06,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:06,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable542 [2021-06-14 09:26:06,950 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:06,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:06,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1167373097, now seen corresponding path program 1 times [2021-06-14 09:26:06,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:06,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960214224] [2021-06-14 09:26:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:06,955 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:06,958 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:06,961 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:06,961 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:06,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable543 [2021-06-14 09:26:06,961 INFO L301 ceAbstractionStarter]: Result for error location fooThread22of22ForFork0 was UNSAFE (17/24) [2021-06-14 09:26:06,961 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:06,965 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:06,966 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:06,966 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:06,966 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:06,966 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:06,966 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:06,966 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:06,966 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread16of22ForFork0======== [2021-06-14 09:26:07,961 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:07,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:07,962 INFO L82 PathProgramCache]: Analyzing trace with hash -647177781, now seen corresponding path program 1 times [2021-06-14 09:26:07,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:07,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047859884] [2021-06-14 09:26:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:26:07,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:07,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047859884] [2021-06-14 09:26:07,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047859884] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:07,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:07,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:07,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090607095] [2021-06-14 09:26:07,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:07,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:07,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:07,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:07,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:07,972 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:07,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:07,973 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:08,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544 [2021-06-14 09:26:08,087 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:08,087 INFO L82 PathProgramCache]: Analyzing trace with hash 45923916, now seen corresponding path program 1 times [2021-06-14 09:26:08,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:08,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890888480] [2021-06-14 09:26:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:26:08,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:08,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890888480] [2021-06-14 09:26:08,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890888480] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:08,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:08,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:08,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039414922] [2021-06-14 09:26:08,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:08,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:08,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:08,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:08,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:08,109 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:08,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:08,109 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:08,109 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:08,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable545 [2021-06-14 09:26:08,253 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:08,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:08,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1007537933, now seen corresponding path program 1 times [2021-06-14 09:26:08,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:08,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691669019] [2021-06-14 09:26:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:08,256 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:08,258 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:08,260 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:08,260 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:08,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546 [2021-06-14 09:26:08,260 INFO L301 ceAbstractionStarter]: Result for error location fooThread16of22ForFork0 was UNSAFE (18/24) [2021-06-14 09:26:08,261 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:08,264 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:08,265 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:08,265 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:08,265 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:08,265 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:08,265 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:08,265 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:08,265 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:26:08,987 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:26:08,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash 830901938, now seen corresponding path program 1 times [2021-06-14 09:26:08,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:08,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182570672] [2021-06-14 09:26:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:08,991 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:08,992 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:08,994 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:08,994 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:08,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547 [2021-06-14 09:26:08,994 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (19/24) [2021-06-14 09:26:08,994 WARN L243 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:26:08,994 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2021-06-14 09:26:09,024 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:26:09,025 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:09,029 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:09,029 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:09,029 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:09,029 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:09,029 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:09,029 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:09,029 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:09,030 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of23ForFork0======== [2021-06-14 09:26:09,741 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:09,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:09,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1842129686, now seen corresponding path program 1 times [2021-06-14 09:26:09,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:09,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421149446] [2021-06-14 09:26:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:26:09,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:09,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421149446] [2021-06-14 09:26:09,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421149446] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:09,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:09,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:26:09,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701632134] [2021-06-14 09:26:09,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:09,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:09,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:09,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:09,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:09,749 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:09,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:09,749 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:09,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548 [2021-06-14 09:26:09,779 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:09,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1271443445, now seen corresponding path program 1 times [2021-06-14 09:26:09,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:09,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797034946] [2021-06-14 09:26:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:26:09,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:09,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797034946] [2021-06-14 09:26:09,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797034946] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:09,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:09,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:09,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659878086] [2021-06-14 09:26:09,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:09,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:09,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:09,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:09,791 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:09,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:09,791 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:09,791 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:10,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549 [2021-06-14 09:26:10,282 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:10,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:10,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1355322466, now seen corresponding path program 1 times [2021-06-14 09:26:10,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:10,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139403066] [2021-06-14 09:26:10,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:10,285 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:10,285 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:10,286 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:10,286 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:10,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550 [2021-06-14 09:26:10,287 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of23ForFork0 was UNSAFE (1/25) [2021-06-14 09:26:10,287 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:10,291 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:10,291 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:10,291 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:10,291 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:10,291 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:10,291 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:10,291 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:10,291 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of23ForFork0======== [2021-06-14 09:26:11,011 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:11,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:11,011 INFO L82 PathProgramCache]: Analyzing trace with hash 547186739, now seen corresponding path program 1 times [2021-06-14 09:26:11,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:11,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394487762] [2021-06-14 09:26:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:26:11,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:11,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394487762] [2021-06-14 09:26:11,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394487762] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:11,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:11,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:11,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483167156] [2021-06-14 09:26:11,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:11,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:11,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:11,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:11,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:11,020 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:11,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:11,020 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:11,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:11,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551 [2021-06-14 09:26:11,038 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:11,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:11,039 INFO L82 PathProgramCache]: Analyzing trace with hash 547187700, now seen corresponding path program 1 times [2021-06-14 09:26:11,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:11,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309943707] [2021-06-14 09:26:11,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:26:11,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:11,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309943707] [2021-06-14 09:26:11,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309943707] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:11,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:11,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:11,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117066875] [2021-06-14 09:26:11,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:11,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:11,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:11,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:11,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:11,050 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:11,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:11,050 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:11,050 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:11,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552 [2021-06-14 09:26:11,099 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:11,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:11,099 INFO L82 PathProgramCache]: Analyzing trace with hash -217048631, now seen corresponding path program 1 times [2021-06-14 09:26:11,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:11,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740694276] [2021-06-14 09:26:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:11,102 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:11,102 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:11,103 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:11,103 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:11,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553 [2021-06-14 09:26:11,104 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of23ForFork0 was UNSAFE (2/25) [2021-06-14 09:26:11,104 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:11,107 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:11,107 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:11,108 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:11,108 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:11,108 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:11,108 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:11,108 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:11,108 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of23ForFork0======== [2021-06-14 09:26:11,814 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:11,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:11,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2048934461, now seen corresponding path program 1 times [2021-06-14 09:26:11,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:11,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447299371] [2021-06-14 09:26:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:26:11,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:11,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447299371] [2021-06-14 09:26:11,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447299371] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:11,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:11,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:26:11,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822905433] [2021-06-14 09:26:11,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:11,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:11,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:11,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:11,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:11,822 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:11,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:11,823 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:12,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable554 [2021-06-14 09:26:12,023 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:12,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:12,023 INFO L82 PathProgramCache]: Analyzing trace with hash 885390627, now seen corresponding path program 1 times [2021-06-14 09:26:12,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:12,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196342345] [2021-06-14 09:26:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:26:12,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:12,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196342345] [2021-06-14 09:26:12,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196342345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:26:12,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394801267] [2021-06-14 09:26:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:26:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:12,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:26:12,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:26:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:26:12,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394801267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:26:12,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:26:12,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:26:12,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117492121] [2021-06-14 09:26:12,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:12,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:12,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:12,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:12,170 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:12,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:12,170 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:12,170 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:12,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2021-06-14 09:26:12,585 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:12,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:12,586 INFO L82 PathProgramCache]: Analyzing trace with hash 2073030911, now seen corresponding path program 1 times [2021-06-14 09:26:12,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:12,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233083009] [2021-06-14 09:26:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:12,588 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:12,588 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:12,589 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:12,589 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:12,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556 [2021-06-14 09:26:12,590 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of23ForFork0 was UNSAFE (3/25) [2021-06-14 09:26:12,590 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:12,594 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:12,594 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:12,594 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:12,594 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:12,594 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:12,594 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:12,594 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:12,594 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of23ForFork0======== [2021-06-14 09:26:13,440 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:13,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:13,441 INFO L82 PathProgramCache]: Analyzing trace with hash 720031070, now seen corresponding path program 1 times [2021-06-14 09:26:13,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:13,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954437128] [2021-06-14 09:26:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:26:13,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:13,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954437128] [2021-06-14 09:26:13,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954437128] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:13,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:13,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:13,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736780855] [2021-06-14 09:26:13,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:13,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:13,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:13,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:13,450 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:13,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:13,450 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:13,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557 [2021-06-14 09:26:13,489 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:13,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:13,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1607534751, now seen corresponding path program 1 times [2021-06-14 09:26:13,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:13,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610708869] [2021-06-14 09:26:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:26:13,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:13,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610708869] [2021-06-14 09:26:13,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610708869] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:13,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:13,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:13,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880843654] [2021-06-14 09:26:13,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:13,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:13,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:13,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:13,501 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:13,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:13,501 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:13,501 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:13,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:13,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable558 [2021-06-14 09:26:13,532 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:13,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1608458272, now seen corresponding path program 1 times [2021-06-14 09:26:13,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:13,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367178849] [2021-06-14 09:26:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:13,534 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:13,535 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:13,536 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:13,536 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:13,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559 [2021-06-14 09:26:13,536 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of23ForFork0 was UNSAFE (4/25) [2021-06-14 09:26:13,537 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:13,541 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:13,541 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:13,541 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:13,541 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:13,541 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:13,541 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:13,541 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:13,541 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of23ForFork0======== [2021-06-14 09:26:14,285 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash 108463337, now seen corresponding path program 1 times [2021-06-14 09:26:14,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:14,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182007254] [2021-06-14 09:26:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:26:14,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:14,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182007254] [2021-06-14 09:26:14,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182007254] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:14,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:14,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:14,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929293455] [2021-06-14 09:26:14,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:14,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:14,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:14,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:14,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:14,293 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:14,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:14,294 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:14,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560 [2021-06-14 09:26:14,337 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:14,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1698991126, now seen corresponding path program 1 times [2021-06-14 09:26:14,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:14,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686669525] [2021-06-14 09:26:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:26:14,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:14,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686669525] [2021-06-14 09:26:14,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686669525] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:14,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:14,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:14,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158990920] [2021-06-14 09:26:14,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:14,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:14,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:14,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:14,348 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:14,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:14,348 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:14,348 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:14,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:14,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:14,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561 [2021-06-14 09:26:14,386 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:14,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash -811487445, now seen corresponding path program 1 times [2021-06-14 09:26:14,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:14,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587694752] [2021-06-14 09:26:14,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:14,388 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:14,389 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:14,389 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:14,389 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:14,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562 [2021-06-14 09:26:14,390 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of23ForFork0 was UNSAFE (5/25) [2021-06-14 09:26:14,390 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:14,394 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:14,394 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:14,394 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:14,394 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:14,394 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:14,394 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:14,394 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:14,394 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:26:15,184 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (6/25) [2021-06-14 09:26:15,184 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:15,188 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:15,188 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:15,188 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:15,188 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:15,188 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:15,188 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:15,188 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:15,188 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of23ForFork0======== [2021-06-14 09:26:16,050 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:16,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1333326859, now seen corresponding path program 1 times [2021-06-14 09:26:16,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:16,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504669000] [2021-06-14 09:26:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:26:16,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:16,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504669000] [2021-06-14 09:26:16,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504669000] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:16,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:16,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:16,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084681205] [2021-06-14 09:26:16,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:16,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:16,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:16,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:16,059 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:16,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:16,059 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:16,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563 [2021-06-14 09:26:16,111 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:16,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:16,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1164689078, now seen corresponding path program 1 times [2021-06-14 09:26:16,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:16,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260349247] [2021-06-14 09:26:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:26:16,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:16,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260349247] [2021-06-14 09:26:16,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260349247] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:16,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:16,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:16,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119734890] [2021-06-14 09:26:16,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:16,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:16,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:16,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:16,125 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:16,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:16,125 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:16,125 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:16,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable564 [2021-06-14 09:26:16,170 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:16,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:16,170 INFO L82 PathProgramCache]: Analyzing trace with hash -642765385, now seen corresponding path program 1 times [2021-06-14 09:26:16,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:16,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791271147] [2021-06-14 09:26:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:16,173 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:16,174 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:16,175 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:16,175 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:16,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable565 [2021-06-14 09:26:16,176 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of23ForFork0 was UNSAFE (7/25) [2021-06-14 09:26:16,176 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:16,179 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:16,180 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:16,180 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:16,180 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:16,180 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:16,180 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:16,180 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:16,180 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread7of23ForFork0======== [2021-06-14 09:26:16,968 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:16,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:16,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1383919874, now seen corresponding path program 1 times [2021-06-14 09:26:16,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:16,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929502331] [2021-06-14 09:26:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:26:16,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:16,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929502331] [2021-06-14 09:26:16,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929502331] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:16,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:16,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:16,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389521107] [2021-06-14 09:26:16,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:16,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:16,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:16,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:16,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:16,977 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:16,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:16,977 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:17,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:17,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566 [2021-06-14 09:26:17,035 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:17,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:17,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1090516867, now seen corresponding path program 1 times [2021-06-14 09:26:17,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:17,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683740926] [2021-06-14 09:26:17,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:26:17,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:17,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683740926] [2021-06-14 09:26:17,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683740926] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:17,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:17,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:17,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939418658] [2021-06-14 09:26:17,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:17,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:17,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:17,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:17,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:17,047 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:17,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:17,047 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:17,047 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:17,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567 [2021-06-14 09:26:17,102 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:17,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:17,102 INFO L82 PathProgramCache]: Analyzing trace with hash -706434492, now seen corresponding path program 1 times [2021-06-14 09:26:17,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:17,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673059688] [2021-06-14 09:26:17,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:17,105 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:17,106 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:17,107 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:17,107 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:17,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568 [2021-06-14 09:26:17,107 INFO L301 ceAbstractionStarter]: Result for error location fooThread7of23ForFork0 was UNSAFE (8/25) [2021-06-14 09:26:17,107 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:17,111 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:17,112 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:17,112 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:17,112 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:17,112 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:17,112 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:17,112 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:17,112 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread21of23ForFork0======== [2021-06-14 09:26:18,078 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:18,078 INFO L82 PathProgramCache]: Analyzing trace with hash 953712665, now seen corresponding path program 1 times [2021-06-14 09:26:18,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:18,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581766636] [2021-06-14 09:26:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-06-14 09:26:18,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:18,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581766636] [2021-06-14 09:26:18,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581766636] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:18,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:18,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:18,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561184542] [2021-06-14 09:26:18,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:18,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:18,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:18,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:18,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:18,090 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:18,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:18,090 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:18,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:18,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable569 [2021-06-14 09:26:18,222 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:18,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:18,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1123496678, now seen corresponding path program 1 times [2021-06-14 09:26:18,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:18,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614460090] [2021-06-14 09:26:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-06-14 09:26:18,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:18,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614460090] [2021-06-14 09:26:18,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614460090] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:18,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:18,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:18,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620171942] [2021-06-14 09:26:18,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:18,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:18,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:18,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:18,236 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:18,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:18,236 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:18,236 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:18,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570 [2021-06-14 09:26:18,503 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:18,504 INFO L82 PathProgramCache]: Analyzing trace with hash 121267803, now seen corresponding path program 1 times [2021-06-14 09:26:18,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:18,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212878358] [2021-06-14 09:26:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:18,508 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:18,510 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:18,512 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:18,512 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:18,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571 [2021-06-14 09:26:18,512 INFO L301 ceAbstractionStarter]: Result for error location fooThread21of23ForFork0 was UNSAFE (9/25) [2021-06-14 09:26:18,513 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:18,516 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:18,516 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:18,517 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:18,517 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:18,517 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:18,517 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:18,517 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:18,517 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread20of23ForFork0======== [2021-06-14 09:26:19,606 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:19,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1113793825, now seen corresponding path program 1 times [2021-06-14 09:26:19,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:19,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13872704] [2021-06-14 09:26:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-06-14 09:26:19,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:19,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13872704] [2021-06-14 09:26:19,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13872704] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:19,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:19,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:19,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792200811] [2021-06-14 09:26:19,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:19,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:19,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:19,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:19,617 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:19,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:19,617 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:19,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572 [2021-06-14 09:26:19,746 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:19,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:19,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1103964128, now seen corresponding path program 1 times [2021-06-14 09:26:19,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:19,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222955973] [2021-06-14 09:26:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-06-14 09:26:19,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:19,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222955973] [2021-06-14 09:26:19,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222955973] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:19,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:19,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:19,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193421618] [2021-06-14 09:26:19,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:19,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:19,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:19,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:19,760 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:19,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:19,760 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:19,760 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:19,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable573 [2021-06-14 09:26:19,910 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:19,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:19,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1946238687, now seen corresponding path program 1 times [2021-06-14 09:26:19,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:19,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864602241] [2021-06-14 09:26:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:19,914 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:19,916 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:19,918 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:19,918 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:19,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable574 [2021-06-14 09:26:19,919 INFO L301 ceAbstractionStarter]: Result for error location fooThread20of23ForFork0 was UNSAFE (10/25) [2021-06-14 09:26:19,919 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:19,923 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:19,923 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:19,923 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:19,923 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:19,923 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:19,923 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:19,923 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:19,923 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread22of23ForFork0======== [2021-06-14 09:26:21,025 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:21,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:21,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1361161430, now seen corresponding path program 1 times [2021-06-14 09:26:21,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:21,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084923913] [2021-06-14 09:26:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-06-14 09:26:21,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:21,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084923913] [2021-06-14 09:26:21,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084923913] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:21,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:21,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:21,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666444381] [2021-06-14 09:26:21,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:21,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:21,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:21,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:21,037 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:21,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:21,037 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:21,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable575 [2021-06-14 09:26:21,185 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:21,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:21,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2054263127, now seen corresponding path program 1 times [2021-06-14 09:26:21,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:21,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743114839] [2021-06-14 09:26:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-06-14 09:26:21,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:21,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743114839] [2021-06-14 09:26:21,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743114839] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:21,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:21,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:21,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945092749] [2021-06-14 09:26:21,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:21,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:21,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:21,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:21,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:21,217 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:21,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:21,217 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:21,218 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:21,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:21,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:21,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable576 [2021-06-14 09:26:21,445 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:21,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:21,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1279090152, now seen corresponding path program 1 times [2021-06-14 09:26:21,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:21,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744434086] [2021-06-14 09:26:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:21,451 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:21,454 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:21,458 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:21,458 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:21,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577 [2021-06-14 09:26:21,459 INFO L301 ceAbstractionStarter]: Result for error location fooThread22of23ForFork0 was UNSAFE (11/25) [2021-06-14 09:26:21,459 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:26:21,473 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:21,473 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:21,473 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:21,474 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:21,474 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:21,474 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:21,474 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:21,474 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread11of23ForFork0======== Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:22,331 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:22,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:22,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1364836451, now seen corresponding path program 1 times [2021-06-14 09:26:22,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:22,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734791913] [2021-06-14 09:26:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:26:22,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:22,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734791913] [2021-06-14 09:26:22,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734791913] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:22,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:22,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:22,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890252708] [2021-06-14 09:26:22,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:22,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:22,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:22,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:22,341 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:22,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:22,341 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:22,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578 [2021-06-14 09:26:22,408 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:22,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:22,408 INFO L82 PathProgramCache]: Analyzing trace with hash 142715358, now seen corresponding path program 1 times [2021-06-14 09:26:22,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:22,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172231532] [2021-06-14 09:26:22,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:26:22,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:22,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172231532] [2021-06-14 09:26:22,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172231532] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:22,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:22,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:22,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327683974] [2021-06-14 09:26:22,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:22,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:22,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:22,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:22,425 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:22,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:22,426 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:22,426 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:22,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:22,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579 [2021-06-14 09:26:22,501 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:22,501 INFO L82 PathProgramCache]: Analyzing trace with hash -150687649, now seen corresponding path program 1 times [2021-06-14 09:26:22,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:22,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118527198] [2021-06-14 09:26:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:22,504 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:22,505 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:22,506 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:22,506 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:22,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580 [2021-06-14 09:26:22,507 INFO L301 ceAbstractionStarter]: Result for error location fooThread11of23ForFork0 was UNSAFE (12/25) [2021-06-14 09:26:22,507 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:22,511 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:22,511 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:22,511 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:22,511 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:22,511 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:22,511 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:22,511 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:22,511 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of23ForFork0======== [2021-06-14 09:26:23,427 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:23,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:23,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1530631824, now seen corresponding path program 1 times [2021-06-14 09:26:23,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:23,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766945227] [2021-06-14 09:26:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:26:23,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:23,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766945227] [2021-06-14 09:26:23,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766945227] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:23,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:23,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:23,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095344861] [2021-06-14 09:26:23,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:23,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:23,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:23,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:23,437 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:23,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:23,437 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:23,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581 [2021-06-14 09:26:23,502 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:23,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:23,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1256783663, now seen corresponding path program 1 times [2021-06-14 09:26:23,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:23,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733084081] [2021-06-14 09:26:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:26:23,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:23,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733084081] [2021-06-14 09:26:23,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733084081] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:23,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:23,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:23,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596847251] [2021-06-14 09:26:23,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:23,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:23,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:23,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:23,515 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:23,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:23,515 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:23,515 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:23,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582 [2021-06-14 09:26:23,579 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:23,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1550186670, now seen corresponding path program 1 times [2021-06-14 09:26:23,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:23,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410754564] [2021-06-14 09:26:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:23,582 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:23,583 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:23,584 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:23,584 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:23,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583 [2021-06-14 09:26:23,584 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of23ForFork0 was UNSAFE (13/25) [2021-06-14 09:26:23,585 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:23,590 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:23,590 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:23,590 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:23,590 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:23,590 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:23,590 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:23,590 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:23,590 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread9of23ForFork0======== [2021-06-14 09:26:24,432 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:24,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:24,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1824151521, now seen corresponding path program 1 times [2021-06-14 09:26:24,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:24,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974541990] [2021-06-14 09:26:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:26:24,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:24,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974541990] [2021-06-14 09:26:24,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974541990] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:24,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:24,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:24,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496325325] [2021-06-14 09:26:24,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:24,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:24,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:24,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:24,441 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:24,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:24,441 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:24,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584 [2021-06-14 09:26:24,514 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:24,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:24,515 INFO L82 PathProgramCache]: Analyzing trace with hash -470841824, now seen corresponding path program 1 times [2021-06-14 09:26:24,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:24,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656009426] [2021-06-14 09:26:24,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:26:24,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:24,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656009426] [2021-06-14 09:26:24,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656009426] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:24,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:24,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:24,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748897888] [2021-06-14 09:26:24,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:24,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:24,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:24,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:24,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:24,527 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:24,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:24,527 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:24,527 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:24,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable585 [2021-06-14 09:26:24,602 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:24,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1036709985, now seen corresponding path program 1 times [2021-06-14 09:26:24,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:24,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818490524] [2021-06-14 09:26:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:24,605 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:24,606 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:24,607 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:24,608 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:24,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable586 [2021-06-14 09:26:24,608 INFO L301 ceAbstractionStarter]: Result for error location fooThread9of23ForFork0 was UNSAFE (14/25) [2021-06-14 09:26:24,608 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:24,613 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:24,613 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:24,613 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:24,613 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:24,613 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:24,613 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:24,613 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:24,613 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread10of23ForFork0======== [2021-06-14 09:26:25,466 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:25,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:25,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2081200977, now seen corresponding path program 1 times [2021-06-14 09:26:25,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:25,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395672730] [2021-06-14 09:26:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:26:25,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:25,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395672730] [2021-06-14 09:26:25,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395672730] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:25,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:25,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:25,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906631214] [2021-06-14 09:26:25,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:25,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:25,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:25,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:25,476 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:25,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:25,476 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:25,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable587 [2021-06-14 09:26:25,559 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:25,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1369294448, now seen corresponding path program 1 times [2021-06-14 09:26:25,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:25,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495596735] [2021-06-14 09:26:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:26:25,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:25,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495596735] [2021-06-14 09:26:25,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495596735] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:25,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:25,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:25,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422795304] [2021-06-14 09:26:25,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:25,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:25,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:25,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:25,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:25,572 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:25,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:25,572 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:25,572 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:25,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588 [2021-06-14 09:26:25,749 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:25,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1572363151, now seen corresponding path program 1 times [2021-06-14 09:26:25,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:25,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431053682] [2021-06-14 09:26:25,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:25,752 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:25,754 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:25,755 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:25,755 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:25,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589 [2021-06-14 09:26:25,756 INFO L301 ceAbstractionStarter]: Result for error location fooThread10of23ForFork0 was UNSAFE (15/25) [2021-06-14 09:26:25,756 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:25,761 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:25,761 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:25,761 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:25,761 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:25,761 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:25,761 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:25,761 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:25,761 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread17of23ForFork0======== [2021-06-14 09:26:26,572 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:26,573 INFO L82 PathProgramCache]: Analyzing trace with hash -883077843, now seen corresponding path program 1 times [2021-06-14 09:26:26,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:26,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468228554] [2021-06-14 09:26:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-06-14 09:26:26,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:26,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468228554] [2021-06-14 09:26:26,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468228554] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:26,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:26,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:26,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297862922] [2021-06-14 09:26:26,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:26,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:26,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:26,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:26,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:26,582 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:26,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:26,583 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:26,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590 [2021-06-14 09:26:26,641 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:26,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:26,641 INFO L82 PathProgramCache]: Analyzing trace with hash -882154322, now seen corresponding path program 1 times [2021-06-14 09:26:26,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:26,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242834099] [2021-06-14 09:26:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-06-14 09:26:26,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:26,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242834099] [2021-06-14 09:26:26,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242834099] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:26,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:26,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:26,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794044978] [2021-06-14 09:26:26,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:26,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:26,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:26,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:26,655 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:26,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:26,655 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:26,655 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:26,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591 [2021-06-14 09:26:26,740 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash -882153361, now seen corresponding path program 1 times [2021-06-14 09:26:26,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:26,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256682844] [2021-06-14 09:26:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:26,744 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:26,745 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:26,746 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:26,747 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:26,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592 [2021-06-14 09:26:26,747 INFO L301 ceAbstractionStarter]: Result for error location fooThread17of23ForFork0 was UNSAFE (16/25) [2021-06-14 09:26:26,747 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:26,751 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:26,751 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:26,751 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:26,751 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:26,751 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:26,751 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:26,751 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:26,751 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread19of23ForFork0======== [2021-06-14 09:26:27,606 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:27,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:27,606 INFO L82 PathProgramCache]: Analyzing trace with hash 320301245, now seen corresponding path program 1 times [2021-06-14 09:26:27,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:27,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108310922] [2021-06-14 09:26:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-06-14 09:26:27,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:27,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108310922] [2021-06-14 09:26:27,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108310922] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:27,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:27,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:27,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253672710] [2021-06-14 09:26:27,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:27,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:27,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:27,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:27,616 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:27,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:27,616 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:27,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:27,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593 [2021-06-14 09:26:27,688 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:27,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:27,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1207804926, now seen corresponding path program 1 times [2021-06-14 09:26:27,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:27,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471589126] [2021-06-14 09:26:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-06-14 09:26:27,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:27,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471589126] [2021-06-14 09:26:27,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471589126] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:27,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:27,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:27,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773810436] [2021-06-14 09:26:27,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:27,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:27,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:27,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:27,722 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:27,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:27,723 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:27,723 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:27,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594 [2021-06-14 09:26:27,832 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:27,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:27,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1208728447, now seen corresponding path program 1 times [2021-06-14 09:26:27,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:27,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435263275] [2021-06-14 09:26:27,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:27,837 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:27,839 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:27,841 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:27,841 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:27,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595 [2021-06-14 09:26:27,842 INFO L301 ceAbstractionStarter]: Result for error location fooThread19of23ForFork0 was UNSAFE (17/25) [2021-06-14 09:26:27,842 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:26:27,854 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:27,854 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:27,854 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:27,854 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:27,854 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:27,854 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:27,854 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:27,854 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread18of23ForFork0======== Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:28,872 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:28,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1503629336, now seen corresponding path program 1 times [2021-06-14 09:26:28,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:28,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351459849] [2021-06-14 09:26:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-06-14 09:26:28,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:28,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351459849] [2021-06-14 09:26:28,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351459849] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:28,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:28,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:28,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420591674] [2021-06-14 09:26:28,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:28,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:28,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:28,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:28,886 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:28,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:28,886 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:28,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596 [2021-06-14 09:26:28,974 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:28,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:28,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1797032343, now seen corresponding path program 1 times [2021-06-14 09:26:28,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:28,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662231418] [2021-06-14 09:26:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-06-14 09:26:28,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:28,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662231418] [2021-06-14 09:26:28,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662231418] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:28,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:28,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:28,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490216034] [2021-06-14 09:26:28,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:28,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:28,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:28,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:28,988 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:28,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:28,988 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:28,988 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:29,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:29,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable597 [2021-06-14 09:26:29,113 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:29,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:29,113 INFO L82 PathProgramCache]: Analyzing trace with hash 700983594, now seen corresponding path program 1 times [2021-06-14 09:26:29,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:29,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880570719] [2021-06-14 09:26:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:29,116 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:29,118 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:29,120 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:29,120 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:29,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable598 [2021-06-14 09:26:29,120 INFO L301 ceAbstractionStarter]: Result for error location fooThread18of23ForFork0 was UNSAFE (18/25) [2021-06-14 09:26:29,120 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:29,130 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:29,130 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:29,130 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:29,130 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:29,130 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:29,130 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:29,130 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:29,130 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread13of23ForFork0======== [2021-06-14 09:26:29,984 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:29,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:29,984 INFO L82 PathProgramCache]: Analyzing trace with hash 11839872, now seen corresponding path program 1 times [2021-06-14 09:26:29,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:29,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266800135] [2021-06-14 09:26:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:26:30,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:30,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266800135] [2021-06-14 09:26:30,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266800135] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:30,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:30,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:30,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885635026] [2021-06-14 09:26:30,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:30,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:30,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:30,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:30,003 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:30,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:30,003 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:30,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599 [2021-06-14 09:26:30,087 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:30,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:30,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1519391681, now seen corresponding path program 1 times [2021-06-14 09:26:30,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:30,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117135476] [2021-06-14 09:26:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:26:30,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:30,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117135476] [2021-06-14 09:26:30,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117135476] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:30,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:30,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:30,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461740892] [2021-06-14 09:26:30,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:30,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:30,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:30,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:30,103 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:30,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:30,103 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:30,103 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:30,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:30,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600 [2021-06-14 09:26:30,189 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:30,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1225988674, now seen corresponding path program 1 times [2021-06-14 09:26:30,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:30,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577372929] [2021-06-14 09:26:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:30,192 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:30,193 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:30,194 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:30,194 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:30,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601 [2021-06-14 09:26:30,195 INFO L301 ceAbstractionStarter]: Result for error location fooThread13of23ForFork0 was UNSAFE (19/25) [2021-06-14 09:26:30,195 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:30,199 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:30,199 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:30,199 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:30,199 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:30,199 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:30,199 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:30,199 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:30,199 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread23of23ForFork0======== [2021-06-14 09:26:31,282 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:31,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2041345455, now seen corresponding path program 1 times [2021-06-14 09:26:31,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:31,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862565661] [2021-06-14 09:26:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-06-14 09:26:31,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:31,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862565661] [2021-06-14 09:26:31,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862565661] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:31,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:31,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:31,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509495381] [2021-06-14 09:26:31,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:31,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:31,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:31,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:31,294 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:31,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:31,294 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:31,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:31,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602 [2021-06-14 09:26:31,431 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:31,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:31,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1008857360, now seen corresponding path program 1 times [2021-06-14 09:26:31,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:31,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245061879] [2021-06-14 09:26:31,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-06-14 09:26:31,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:31,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245061879] [2021-06-14 09:26:31,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245061879] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:31,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:31,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:31,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385698092] [2021-06-14 09:26:31,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:31,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:31,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:31,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:31,446 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:31,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:31,446 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:31,446 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:31,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:31,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603 [2021-06-14 09:26:31,611 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:31,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:31,611 INFO L82 PathProgramCache]: Analyzing trace with hash -797506447, now seen corresponding path program 1 times [2021-06-14 09:26:31,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:31,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340554104] [2021-06-14 09:26:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:31,616 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:31,618 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:31,621 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:31,621 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:31,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604 [2021-06-14 09:26:31,621 INFO L301 ceAbstractionStarter]: Result for error location fooThread23of23ForFork0 was UNSAFE (20/25) [2021-06-14 09:26:31,622 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:31,635 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:31,635 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:31,635 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:31,635 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:31,635 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:31,635 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:31,635 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:31,635 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread12of23ForFork0======== [2021-06-14 09:26:32,485 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:32,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:32,486 INFO L82 PathProgramCache]: Analyzing trace with hash 878712654, now seen corresponding path program 1 times [2021-06-14 09:26:32,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:32,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233280460] [2021-06-14 09:26:32,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:26:32,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:32,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233280460] [2021-06-14 09:26:32,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233280460] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:32,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:32,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:32,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313135875] [2021-06-14 09:26:32,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:32,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:32,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:32,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:32,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:32,496 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:32,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:32,496 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:32,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605 [2021-06-14 09:26:32,567 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:32,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:32,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1908702833, now seen corresponding path program 1 times [2021-06-14 09:26:32,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:32,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474365056] [2021-06-14 09:26:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:26:32,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:32,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474365056] [2021-06-14 09:26:32,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474365056] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:32,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:32,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:32,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859075202] [2021-06-14 09:26:32,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:32,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:32,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:32,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:32,581 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:32,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:32,581 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:32,581 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:32,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606 [2021-06-14 09:26:32,663 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:32,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:32,664 INFO L82 PathProgramCache]: Analyzing trace with hash 2092861456, now seen corresponding path program 1 times [2021-06-14 09:26:32,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:32,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869510269] [2021-06-14 09:26:32,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:32,666 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:32,668 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:32,669 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:32,669 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:32,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607 [2021-06-14 09:26:32,669 INFO L301 ceAbstractionStarter]: Result for error location fooThread12of23ForFork0 was UNSAFE (21/25) [2021-06-14 09:26:32,669 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:32,673 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:32,673 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:32,673 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:32,673 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:32,674 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:32,674 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:32,674 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:32,674 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread14of23ForFork0======== [2021-06-14 09:26:33,697 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:33,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:33,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1917668615, now seen corresponding path program 1 times [2021-06-14 09:26:33,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:33,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896774636] [2021-06-14 09:26:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:26:33,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:33,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896774636] [2021-06-14 09:26:33,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896774636] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:33,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:33,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:33,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871543198] [2021-06-14 09:26:33,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:33,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:33,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:33,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:33,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:33,707 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:33,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:33,707 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:33,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608 [2021-06-14 09:26:33,818 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:33,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:33,818 INFO L82 PathProgramCache]: Analyzing trace with hash -956054598, now seen corresponding path program 1 times [2021-06-14 09:26:33,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:33,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5034360] [2021-06-14 09:26:33,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-06-14 09:26:33,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:33,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5034360] [2021-06-14 09:26:33,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5034360] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:33,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:33,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:33,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368040315] [2021-06-14 09:26:33,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:33,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:33,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:33,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:33,832 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:33,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:33,832 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:33,832 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:33,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:33,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:33,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609 [2021-06-14 09:26:33,954 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:33,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:33,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1261703355, now seen corresponding path program 1 times [2021-06-14 09:26:33,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:33,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118821253] [2021-06-14 09:26:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:33,958 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:33,960 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:33,961 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:33,961 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:33,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610 [2021-06-14 09:26:33,961 INFO L301 ceAbstractionStarter]: Result for error location fooThread14of23ForFork0 was UNSAFE (22/25) [2021-06-14 09:26:33,962 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:33,966 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:33,966 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:33,966 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:33,966 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:33,966 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:33,966 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:33,966 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:33,966 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:26:34,961 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:26:34,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:34,961 INFO L82 PathProgramCache]: Analyzing trace with hash 460288514, now seen corresponding path program 1 times [2021-06-14 09:26:34,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:34,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284762630] [2021-06-14 09:26:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:34,966 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:34,968 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:34,971 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:34,971 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:34,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611 [2021-06-14 09:26:34,971 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (23/25) [2021-06-14 09:26:34,971 WARN L243 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:26:34,971 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2021-06-14 09:26:34,997 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:26:34,999 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:26:35,005 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:35,005 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:35,005 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:35,005 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:35,005 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:35,006 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:35,006 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:35,006 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of24ForFork0======== Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:35,868 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:35,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:35,868 INFO L82 PathProgramCache]: Analyzing trace with hash 921501540, now seen corresponding path program 1 times [2021-06-14 09:26:35,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:35,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47771701] [2021-06-14 09:26:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:26:35,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:35,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47771701] [2021-06-14 09:26:35,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47771701] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:35,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:35,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:26:35,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390188197] [2021-06-14 09:26:35,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:35,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:35,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:35,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:35,876 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:35,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:35,880 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:36,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:36,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612 [2021-06-14 09:26:36,105 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:36,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:36,105 INFO L82 PathProgramCache]: Analyzing trace with hash -800865349, now seen corresponding path program 1 times [2021-06-14 09:26:36,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:36,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112410608] [2021-06-14 09:26:36,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:26:36,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:36,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112410608] [2021-06-14 09:26:36,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112410608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:26:36,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597960498] [2021-06-14 09:26:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:26:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:36,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:26:36,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:26:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:26:36,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597960498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:26:36,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:26:36,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:26:36,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010486592] [2021-06-14 09:26:36,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:36,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:36,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:36,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:36,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:36,261 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:36,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:36,261 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:36,261 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:36,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable613,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:26:36,686 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:36,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1600949669, now seen corresponding path program 1 times [2021-06-14 09:26:36,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:36,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637993210] [2021-06-14 09:26:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:36,689 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:36,689 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:36,690 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:36,690 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:36,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614 [2021-06-14 09:26:36,690 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of24ForFork0 was UNSAFE (1/26) [2021-06-14 09:26:36,691 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:36,694 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:36,694 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:36,694 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:36,694 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:36,694 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:36,694 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:36,694 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:36,694 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of24ForFork0======== [2021-06-14 09:26:37,457 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:37,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1038700752, now seen corresponding path program 1 times [2021-06-14 09:26:37,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:37,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571627522] [2021-06-14 09:26:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:26:37,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:37,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571627522] [2021-06-14 09:26:37,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571627522] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:37,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:37,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:37,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003457322] [2021-06-14 09:26:37,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:37,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:37,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:37,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:37,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:37,467 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:37,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:37,467 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:37,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615 [2021-06-14 09:26:37,496 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:37,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:37,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1038699791, now seen corresponding path program 1 times [2021-06-14 09:26:37,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:37,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654033963] [2021-06-14 09:26:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:26:37,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:37,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654033963] [2021-06-14 09:26:37,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654033963] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:37,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:37,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:37,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833377307] [2021-06-14 09:26:37,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:37,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:37,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:37,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:37,509 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:37,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:37,509 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:37,509 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:37,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616 [2021-06-14 09:26:37,767 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:37,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:37,768 INFO L82 PathProgramCache]: Analyzing trace with hash 4295175, now seen corresponding path program 1 times [2021-06-14 09:26:37,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:37,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731786333] [2021-06-14 09:26:37,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:37,770 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:37,771 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:37,771 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:37,771 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:37,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617 [2021-06-14 09:26:37,772 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of24ForFork0 was UNSAFE (2/26) [2021-06-14 09:26:37,772 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:37,777 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:37,777 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:37,777 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:37,777 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:37,777 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:37,777 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:37,777 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:37,777 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:26:38,747 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (3/26) [2021-06-14 09:26:38,747 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:38,751 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:38,751 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:38,751 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:38,751 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:38,751 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:38,751 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:38,751 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:38,751 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of24ForFork0======== [2021-06-14 09:26:39,530 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:39,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:39,530 INFO L82 PathProgramCache]: Analyzing trace with hash -109629699, now seen corresponding path program 1 times [2021-06-14 09:26:39,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:39,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861006993] [2021-06-14 09:26:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:26:39,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:39,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861006993] [2021-06-14 09:26:39,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861006993] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:39,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:39,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:39,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28655851] [2021-06-14 09:26:39,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:39,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:39,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:39,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:39,539 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:39,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:39,539 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:39,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:39,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618 [2021-06-14 09:26:39,573 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:39,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:39,574 INFO L82 PathProgramCache]: Analyzing trace with hash -108706178, now seen corresponding path program 1 times [2021-06-14 09:26:39,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:39,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724607375] [2021-06-14 09:26:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:26:39,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:39,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724607375] [2021-06-14 09:26:39,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724607375] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:39,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:39,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:39,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862663837] [2021-06-14 09:26:39,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:39,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:39,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:39,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:39,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:39,586 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:39,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:39,586 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:39,586 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:39,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619 [2021-06-14 09:26:39,609 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:39,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:39,610 INFO L82 PathProgramCache]: Analyzing trace with hash -108705217, now seen corresponding path program 1 times [2021-06-14 09:26:39,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:39,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299093342] [2021-06-14 09:26:39,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:39,612 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:39,613 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:39,613 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:39,614 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:39,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable620 [2021-06-14 09:26:39,614 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of24ForFork0 was UNSAFE (4/26) [2021-06-14 09:26:39,614 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:39,618 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:39,618 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:39,618 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:39,618 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:39,618 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:39,619 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:39,619 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:39,619 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of24ForFork0======== [2021-06-14 09:26:40,427 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:40,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:40,427 INFO L82 PathProgramCache]: Analyzing trace with hash 69475787, now seen corresponding path program 1 times [2021-06-14 09:26:40,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:40,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497364298] [2021-06-14 09:26:40,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:26:40,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:40,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497364298] [2021-06-14 09:26:40,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497364298] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:40,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:40,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:40,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182049043] [2021-06-14 09:26:40,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:40,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:40,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:40,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:40,437 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:40,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:40,437 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:40,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:40,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621 [2021-06-14 09:26:40,474 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:40,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:40,474 INFO L82 PathProgramCache]: Analyzing trace with hash 956979468, now seen corresponding path program 1 times [2021-06-14 09:26:40,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:40,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017557546] [2021-06-14 09:26:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:26:40,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:40,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017557546] [2021-06-14 09:26:40,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017557546] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:40,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:40,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:40,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012041996] [2021-06-14 09:26:40,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:40,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:40,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:40,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:40,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:40,499 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:40,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:40,499 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:40,499 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:40,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622 [2021-06-14 09:26:40,532 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash 957902989, now seen corresponding path program 1 times [2021-06-14 09:26:40,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:40,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187176927] [2021-06-14 09:26:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:40,535 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:40,536 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:40,537 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:40,537 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:40,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623 [2021-06-14 09:26:40,537 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of24ForFork0 was UNSAFE (5/26) [2021-06-14 09:26:40,537 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:40,541 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:40,541 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:40,541 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:40,541 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:40,542 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:40,542 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:40,542 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:40,542 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of24ForFork0======== [2021-06-14 09:26:41,472 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:41,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1875269975, now seen corresponding path program 1 times [2021-06-14 09:26:41,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:41,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886254660] [2021-06-14 09:26:41,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:26:41,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:41,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886254660] [2021-06-14 09:26:41,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886254660] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:41,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:41,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:41,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832681548] [2021-06-14 09:26:41,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:41,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:41,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:41,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:41,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:41,482 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:41,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:41,482 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:41,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624 [2021-06-14 09:26:41,520 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:41,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:41,520 INFO L82 PathProgramCache]: Analyzing trace with hash 612242858, now seen corresponding path program 1 times [2021-06-14 09:26:41,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:41,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002566652] [2021-06-14 09:26:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 09:26:41,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:41,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002566652] [2021-06-14 09:26:41,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002566652] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:41,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:41,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:41,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357447877] [2021-06-14 09:26:41,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:41,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:41,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:41,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:41,532 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:41,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:41,533 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:41,533 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:41,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:41,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:41,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625 [2021-06-14 09:26:41,576 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:41,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:41,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1499746539, now seen corresponding path program 1 times [2021-06-14 09:26:41,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:41,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036890771] [2021-06-14 09:26:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:41,578 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:41,579 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:41,580 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:41,580 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:41,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626 [2021-06-14 09:26:41,581 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of24ForFork0 was UNSAFE (6/26) [2021-06-14 09:26:41,581 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:41,585 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:41,585 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:41,585 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:41,585 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:41,585 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:41,585 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:41,585 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:41,585 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of24ForFork0======== [2021-06-14 09:26:42,420 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:42,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1836725222, now seen corresponding path program 1 times [2021-06-14 09:26:42,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:42,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663943874] [2021-06-14 09:26:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:26:42,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:42,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663943874] [2021-06-14 09:26:42,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663943874] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:42,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:42,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:42,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248791394] [2021-06-14 09:26:42,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:42,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:42,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:42,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:42,430 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:42,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:42,430 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:42,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627 [2021-06-14 09:26:42,478 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:42,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:42,478 INFO L82 PathProgramCache]: Analyzing trace with hash 650787611, now seen corresponding path program 1 times [2021-06-14 09:26:42,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:42,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755549947] [2021-06-14 09:26:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:26:42,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:42,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755549947] [2021-06-14 09:26:42,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755549947] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:42,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:42,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:42,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466084166] [2021-06-14 09:26:42,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:42,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:42,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:42,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:42,491 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:42,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:42,491 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:42,491 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:42,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628 [2021-06-14 09:26:42,533 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:42,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:42,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1538291292, now seen corresponding path program 1 times [2021-06-14 09:26:42,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:42,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895498542] [2021-06-14 09:26:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:42,536 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:42,536 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:42,537 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:42,537 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:42,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629 [2021-06-14 09:26:42,538 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of24ForFork0 was UNSAFE (7/26) [2021-06-14 09:26:42,538 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:42,556 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:42,557 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:42,557 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:42,557 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:42,557 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:42,557 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:42,557 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:42,557 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread20of24ForFork0======== [2021-06-14 09:26:43,717 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:43,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:43,718 INFO L82 PathProgramCache]: Analyzing trace with hash 518186604, now seen corresponding path program 1 times [2021-06-14 09:26:43,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:43,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676090284] [2021-06-14 09:26:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-06-14 09:26:43,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:43,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676090284] [2021-06-14 09:26:43,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676090284] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:43,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:43,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:43,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849784394] [2021-06-14 09:26:43,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:43,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:43,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:43,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:43,728 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:43,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:43,728 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:43,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:43,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630 [2021-06-14 09:26:43,866 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:43,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1559022739, now seen corresponding path program 1 times [2021-06-14 09:26:43,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:43,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904539188] [2021-06-14 09:26:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-06-14 09:26:43,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:43,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904539188] [2021-06-14 09:26:43,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904539188] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:43,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:43,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:43,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691751285] [2021-06-14 09:26:43,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:43,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:43,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:43,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:43,881 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:43,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:43,881 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:43,881 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:44,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:44,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:44,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable631 [2021-06-14 09:26:44,036 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:44,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:44,037 INFO L82 PathProgramCache]: Analyzing trace with hash -314258258, now seen corresponding path program 1 times [2021-06-14 09:26:44,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:44,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602039755] [2021-06-14 09:26:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:44,041 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:44,043 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:44,045 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:44,045 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:44,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632 [2021-06-14 09:26:44,045 INFO L301 ceAbstractionStarter]: Result for error location fooThread20of24ForFork0 was UNSAFE (8/26) [2021-06-14 09:26:44,045 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:44,049 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:44,049 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:44,049 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:44,049 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:44,049 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:44,049 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:44,049 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:44,049 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread10of24ForFork0======== [2021-06-14 09:26:44,936 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:44,936 INFO L82 PathProgramCache]: Analyzing trace with hash -265289935, now seen corresponding path program 1 times [2021-06-14 09:26:44,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:44,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187993560] [2021-06-14 09:26:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:26:44,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:44,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187993560] [2021-06-14 09:26:44,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187993560] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:44,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:44,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:44,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62845714] [2021-06-14 09:26:44,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:44,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:44,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:44,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:44,946 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:44,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:44,946 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:45,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:45,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633 [2021-06-14 09:26:45,008 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash -558692942, now seen corresponding path program 1 times [2021-06-14 09:26:45,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:45,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173876410] [2021-06-14 09:26:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-06-14 09:26:45,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:45,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173876410] [2021-06-14 09:26:45,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173876410] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:45,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:45,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:45,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812914429] [2021-06-14 09:26:45,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:45,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:45,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:45,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:45,023 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:45,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:45,023 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:45,023 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:45,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634 [2021-06-14 09:26:45,094 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:45,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:45,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1939322995, now seen corresponding path program 1 times [2021-06-14 09:26:45,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:45,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542871214] [2021-06-14 09:26:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:45,097 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:45,098 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:45,099 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:45,100 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:45,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable635 [2021-06-14 09:26:45,100 INFO L301 ceAbstractionStarter]: Result for error location fooThread10of24ForFork0 was UNSAFE (9/26) [2021-06-14 09:26:45,100 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:45,104 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:45,104 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:45,104 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:45,104 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:45,105 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:45,105 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:45,105 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:45,105 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of24ForFork0======== [2021-06-14 09:26:46,071 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:46,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:46,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1325147916, now seen corresponding path program 1 times [2021-06-14 09:26:46,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:46,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702635836] [2021-06-14 09:26:46,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:26:46,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:46,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702635836] [2021-06-14 09:26:46,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702635836] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:46,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:46,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:46,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135366376] [2021-06-14 09:26:46,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:46,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:46,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:46,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:46,082 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:46,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:46,082 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:46,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636 [2021-06-14 09:26:46,136 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:46,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:46,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1031744909, now seen corresponding path program 1 times [2021-06-14 09:26:46,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:46,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109845516] [2021-06-14 09:26:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-14 09:26:46,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:46,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109845516] [2021-06-14 09:26:46,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109845516] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:46,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:46,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:46,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53352754] [2021-06-14 09:26:46,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:46,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:46,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:46,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:46,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:46,148 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:46,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:46,148 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:46,148 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:46,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:46,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:46,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637 [2021-06-14 09:26:46,209 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:46,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:46,209 INFO L82 PathProgramCache]: Analyzing trace with hash -765206450, now seen corresponding path program 1 times [2021-06-14 09:26:46,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:46,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113800066] [2021-06-14 09:26:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:46,212 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:46,213 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:46,214 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:46,214 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:46,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638 [2021-06-14 09:26:46,214 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of24ForFork0 was UNSAFE (10/26) [2021-06-14 09:26:46,215 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:46,220 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:46,220 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:46,220 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:46,220 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:46,220 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:46,220 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:46,221 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:46,221 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread7of24ForFork0======== [2021-06-14 09:26:47,152 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:47,153 INFO L82 PathProgramCache]: Analyzing trace with hash -769750597, now seen corresponding path program 1 times [2021-06-14 09:26:47,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:47,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693975499] [2021-06-14 09:26:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:26:47,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:47,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693975499] [2021-06-14 09:26:47,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693975499] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:47,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:47,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:47,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704703180] [2021-06-14 09:26:47,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:47,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:47,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:47,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:47,176 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:47,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:47,177 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:47,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639 [2021-06-14 09:26:47,238 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:47,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:47,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1063153604, now seen corresponding path program 1 times [2021-06-14 09:26:47,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:47,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789522460] [2021-06-14 09:26:47,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:26:47,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:47,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789522460] [2021-06-14 09:26:47,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789522460] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:47,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:47,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:47,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206835593] [2021-06-14 09:26:47,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:47,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:47,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:47,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:47,252 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:47,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:47,252 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:47,252 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:47,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable640 [2021-06-14 09:26:47,308 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:47,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:47,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1434862333, now seen corresponding path program 1 times [2021-06-14 09:26:47,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:47,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952909234] [2021-06-14 09:26:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:47,311 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:47,312 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:47,313 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:47,313 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:47,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable641 [2021-06-14 09:26:47,313 INFO L301 ceAbstractionStarter]: Result for error location fooThread7of24ForFork0 was UNSAFE (11/26) [2021-06-14 09:26:47,314 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:47,318 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:47,318 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:47,318 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:47,319 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:47,319 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:47,319 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:47,319 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:47,319 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread9of24ForFork0======== [2021-06-14 09:26:48,466 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:48,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:48,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1403165728, now seen corresponding path program 1 times [2021-06-14 09:26:48,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:48,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521942048] [2021-06-14 09:26:48,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:26:48,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:48,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521942048] [2021-06-14 09:26:48,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521942048] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:48,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:48,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:48,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967163577] [2021-06-14 09:26:48,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:48,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:48,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:48,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:48,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:48,476 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:48,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:48,476 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:48,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable642 [2021-06-14 09:26:48,564 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:48,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:48,573 INFO L82 PathProgramCache]: Analyzing trace with hash -49856031, now seen corresponding path program 1 times [2021-06-14 09:26:48,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:48,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159260868] [2021-06-14 09:26:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:26:48,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:48,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159260868] [2021-06-14 09:26:48,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159260868] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:48,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:48,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:48,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853359713] [2021-06-14 09:26:48,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:48,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:48,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:48,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:48,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:48,589 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:48,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:48,589 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:48,589 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:48,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643 [2021-06-14 09:26:48,663 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:48,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:48,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1457695778, now seen corresponding path program 1 times [2021-06-14 09:26:48,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:48,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859494127] [2021-06-14 09:26:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:48,666 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:48,667 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:48,668 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:48,668 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:48,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable644 [2021-06-14 09:26:48,669 INFO L301 ceAbstractionStarter]: Result for error location fooThread9of24ForFork0 was UNSAFE (12/26) [2021-06-14 09:26:48,669 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:48,673 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:48,673 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:48,673 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:48,673 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:48,673 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:48,673 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:48,673 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:48,674 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread17of24ForFork0======== [2021-06-14 09:26:49,531 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:49,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1150341133, now seen corresponding path program 1 times [2021-06-14 09:26:49,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:49,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944589455] [2021-06-14 09:26:49,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-06-14 09:26:49,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:49,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944589455] [2021-06-14 09:26:49,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944589455] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:49,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:49,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:49,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933099065] [2021-06-14 09:26:49,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:49,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:49,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:49,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:49,542 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:49,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:49,542 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:49,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645 [2021-06-14 09:26:49,596 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:49,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1150342094, now seen corresponding path program 1 times [2021-06-14 09:26:49,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:49,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543024232] [2021-06-14 09:26:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-06-14 09:26:49,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:49,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543024232] [2021-06-14 09:26:49,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543024232] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:49,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:49,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:49,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264980050] [2021-06-14 09:26:49,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:49,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:49,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:49,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:49,609 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:49,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:49,609 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:49,609 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:49,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable646 [2021-06-14 09:26:49,695 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:49,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:49,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1300868276, now seen corresponding path program 1 times [2021-06-14 09:26:49,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:49,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525293617] [2021-06-14 09:26:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:49,698 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:49,700 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:49,701 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:49,701 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:49,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647 [2021-06-14 09:26:49,702 INFO L301 ceAbstractionStarter]: Result for error location fooThread17of24ForFork0 was UNSAFE (13/26) [2021-06-14 09:26:49,702 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:49,708 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:49,708 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:49,708 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:49,708 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:49,708 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:49,708 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:49,708 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:49,708 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread16of24ForFork0======== [2021-06-14 09:26:50,655 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:50,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:50,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1540731956, now seen corresponding path program 1 times [2021-06-14 09:26:50,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:50,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792917736] [2021-06-14 09:26:50,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:26:50,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:50,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792917736] [2021-06-14 09:26:50,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792917736] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:50,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:50,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:50,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785341879] [2021-06-14 09:26:50,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:50,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:50,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:50,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:50,665 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:50,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:50,665 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:50,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648 [2021-06-14 09:26:50,721 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:50,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1541655477, now seen corresponding path program 1 times [2021-06-14 09:26:50,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:50,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464562381] [2021-06-14 09:26:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-06-14 09:26:50,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:50,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464562381] [2021-06-14 09:26:50,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464562381] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:50,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:50,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:50,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002617456] [2021-06-14 09:26:50,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:50,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:50,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:50,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:50,750 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:50,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:50,750 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:50,750 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:50,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:50,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649 [2021-06-14 09:26:50,837 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:50,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1541656438, now seen corresponding path program 1 times [2021-06-14 09:26:50,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:50,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838884955] [2021-06-14 09:26:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:50,841 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:50,843 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:50,845 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:50,845 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:50,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable650 [2021-06-14 09:26:50,846 INFO L301 ceAbstractionStarter]: Result for error location fooThread16of24ForFork0 was UNSAFE (14/26) [2021-06-14 09:26:50,846 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:50,851 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:50,851 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:50,851 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:50,851 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:50,851 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:50,851 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:50,851 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:50,851 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread18of24ForFork0======== [2021-06-14 09:26:51,854 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:51,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:51,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2009883733, now seen corresponding path program 1 times [2021-06-14 09:26:51,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:51,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428489742] [2021-06-14 09:26:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-06-14 09:26:51,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:51,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428489742] [2021-06-14 09:26:51,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428489742] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:51,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:51,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:51,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119064554] [2021-06-14 09:26:51,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:51,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:51,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:51,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:51,864 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:51,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:51,864 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:51,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:51,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable651 [2021-06-14 09:26:51,941 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:51,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:51,941 INFO L82 PathProgramCache]: Analyzing trace with hash 477629100, now seen corresponding path program 1 times [2021-06-14 09:26:51,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:51,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477915610] [2021-06-14 09:26:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-06-14 09:26:51,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:51,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477915610] [2021-06-14 09:26:51,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477915610] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:51,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:51,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:51,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670632461] [2021-06-14 09:26:51,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:51,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:51,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:51,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:51,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:51,958 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:51,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:51,958 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:51,958 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:52,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:52,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable652 [2021-06-14 09:26:52,050 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:52,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1365132781, now seen corresponding path program 1 times [2021-06-14 09:26:52,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:52,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19290747] [2021-06-14 09:26:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:52,054 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:52,055 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:52,057 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:52,057 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:52,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable653 [2021-06-14 09:26:52,057 INFO L301 ceAbstractionStarter]: Result for error location fooThread18of24ForFork0 was UNSAFE (15/26) [2021-06-14 09:26:52,057 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:52,061 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:52,061 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:52,061 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:52,061 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:52,062 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:52,062 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:52,062 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:52,062 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread23of24ForFork0======== [2021-06-14 09:26:53,145 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:53,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:53,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1849629635, now seen corresponding path program 1 times [2021-06-14 09:26:53,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:53,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491890938] [2021-06-14 09:26:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-06-14 09:26:53,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:53,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491890938] [2021-06-14 09:26:53,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491890938] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:53,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:53,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:53,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117900512] [2021-06-14 09:26:53,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:53,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:53,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:53,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:53,159 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:53,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:53,159 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:53,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654 [2021-06-14 09:26:53,265 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:53,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:53,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1556226628, now seen corresponding path program 1 times [2021-06-14 09:26:53,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:53,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733120013] [2021-06-14 09:26:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-06-14 09:26:53,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:53,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733120013] [2021-06-14 09:26:53,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733120013] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:53,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:53,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:53,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372045] [2021-06-14 09:26:53,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:53,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:53,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:53,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:53,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:53,279 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:53,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:53,279 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:53,279 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:53,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:53,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655 [2021-06-14 09:26:53,409 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:53,409 INFO L82 PathProgramCache]: Analyzing trace with hash -240724731, now seen corresponding path program 1 times [2021-06-14 09:26:53,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:53,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044698815] [2021-06-14 09:26:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:53,413 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:53,415 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:53,417 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:53,417 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:53,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable656 [2021-06-14 09:26:53,418 INFO L301 ceAbstractionStarter]: Result for error location fooThread23of24ForFork0 was UNSAFE (16/26) [2021-06-14 09:26:53,418 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:53,422 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:53,422 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:53,422 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:53,423 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:53,423 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:53,423 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:53,423 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:53,423 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread12of24ForFork0======== [2021-06-14 09:26:54,288 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:54,289 INFO L82 PathProgramCache]: Analyzing trace with hash 604833495, now seen corresponding path program 1 times [2021-06-14 09:26:54,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:54,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720896313] [2021-06-14 09:26:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:26:54,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:54,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720896313] [2021-06-14 09:26:54,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720896313] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:54,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:54,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:54,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94480373] [2021-06-14 09:26:54,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:54,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:54,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:54,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:54,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:54,301 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:54,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:54,301 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:54,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:54,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657 [2021-06-14 09:26:54,352 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:54,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:54,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1492337176, now seen corresponding path program 1 times [2021-06-14 09:26:54,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:54,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726833569] [2021-06-14 09:26:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-06-14 09:26:54,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:54,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726833569] [2021-06-14 09:26:54,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726833569] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:54,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:54,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:54,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467794593] [2021-06-14 09:26:54,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:54,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:54,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:54,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:54,365 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:54,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:54,365 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:54,365 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:54,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:54,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658 [2021-06-14 09:26:54,440 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:54,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1493260697, now seen corresponding path program 1 times [2021-06-14 09:26:54,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:54,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018909179] [2021-06-14 09:26:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:54,443 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:54,444 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:54,445 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:54,445 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:54,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659 [2021-06-14 09:26:54,446 INFO L301 ceAbstractionStarter]: Result for error location fooThread12of24ForFork0 was UNSAFE (17/26) [2021-06-14 09:26:54,446 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:54,450 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:54,450 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:54,450 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:54,450 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:54,450 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:54,450 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:54,450 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:54,450 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread11of24ForFork0======== [2021-06-14 09:26:55,420 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:55,421 INFO L82 PathProgramCache]: Analyzing trace with hash 903359620, now seen corresponding path program 1 times [2021-06-14 09:26:55,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:55,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802409268] [2021-06-14 09:26:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:26:55,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:55,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802409268] [2021-06-14 09:26:55,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802409268] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:55,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:55,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:55,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930457468] [2021-06-14 09:26:55,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:55,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:55,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:55,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:55,430 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:55,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:55,431 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:55,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660 [2021-06-14 09:26:55,488 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:55,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:55,489 INFO L82 PathProgramCache]: Analyzing trace with hash -893591739, now seen corresponding path program 1 times [2021-06-14 09:26:55,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:55,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521781097] [2021-06-14 09:26:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-06-14 09:26:55,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:55,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521781097] [2021-06-14 09:26:55,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521781097] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:55,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:55,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:55,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417191414] [2021-06-14 09:26:55,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:55,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:55,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:55,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:55,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:55,501 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:55,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:55,502 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:55,502 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:55,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable661 [2021-06-14 09:26:55,569 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:55,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:55,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1593921094, now seen corresponding path program 1 times [2021-06-14 09:26:55,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:55,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276039941] [2021-06-14 09:26:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:55,572 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:55,573 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:55,575 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:55,575 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:55,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable662 [2021-06-14 09:26:55,576 INFO L301 ceAbstractionStarter]: Result for error location fooThread11of24ForFork0 was UNSAFE (18/26) [2021-06-14 09:26:55,576 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:26:55,609 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:55,609 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:55,610 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:55,610 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:55,610 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:55,610 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:55,610 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:55,610 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread19of24ForFork0======== Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:56,718 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:56,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1381544909, now seen corresponding path program 1 times [2021-06-14 09:26:56,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:56,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546947157] [2021-06-14 09:26:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-06-14 09:26:56,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:56,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546947157] [2021-06-14 09:26:56,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546947157] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:56,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:56,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:56,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825201838] [2021-06-14 09:26:56,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:56,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:56,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:56,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:56,730 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:56,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:56,730 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:56,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable663 [2021-06-14 09:26:56,847 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:56,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:56,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1592895822, now seen corresponding path program 1 times [2021-06-14 09:26:56,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:56,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53024093] [2021-06-14 09:26:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-06-14 09:26:56,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:56,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53024093] [2021-06-14 09:26:56,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53024093] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:56,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:56,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:56,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058321595] [2021-06-14 09:26:56,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:56,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:56,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:56,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:56,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:56,864 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:56,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:56,864 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:56,864 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:57,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:57,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable664 [2021-06-14 09:26:57,084 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:57,084 INFO L82 PathProgramCache]: Analyzing trace with hash 748423951, now seen corresponding path program 1 times [2021-06-14 09:26:57,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:57,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092637967] [2021-06-14 09:26:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:57,088 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:57,090 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:57,091 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:57,092 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:57,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665 [2021-06-14 09:26:57,092 INFO L301 ceAbstractionStarter]: Result for error location fooThread19of24ForFork0 was UNSAFE (19/26) [2021-06-14 09:26:57,092 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:57,096 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:57,096 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:57,096 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:57,096 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:57,096 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:57,096 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:57,096 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:57,096 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread21of24ForFork0======== [2021-06-14 09:26:58,143 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:58,143 INFO L82 PathProgramCache]: Analyzing trace with hash -862267319, now seen corresponding path program 1 times [2021-06-14 09:26:58,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:58,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370041438] [2021-06-14 09:26:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-06-14 09:26:58,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:58,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370041438] [2021-06-14 09:26:58,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370041438] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:58,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:58,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:58,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794303110] [2021-06-14 09:26:58,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:58,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:58,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:58,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:58,154 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:58,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:58,154 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:58,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:58,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666 [2021-06-14 09:26:58,285 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:58,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:58,285 INFO L82 PathProgramCache]: Analyzing trace with hash 382497162, now seen corresponding path program 1 times [2021-06-14 09:26:58,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:58,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905267597] [2021-06-14 09:26:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-06-14 09:26:58,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:58,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905267597] [2021-06-14 09:26:58,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905267597] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:58,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:58,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:58,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338892785] [2021-06-14 09:26:58,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:58,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:58,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:58,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:58,299 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:58,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:58,299 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:58,299 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:58,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:58,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:58,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667 [2021-06-14 09:26:58,452 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:58,452 INFO L82 PathProgramCache]: Analyzing trace with hash 593848075, now seen corresponding path program 1 times [2021-06-14 09:26:58,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:58,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30660639] [2021-06-14 09:26:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:58,457 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:58,459 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:58,461 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:26:58,461 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:26:58,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable668 [2021-06-14 09:26:58,462 INFO L301 ceAbstractionStarter]: Result for error location fooThread21of24ForFork0 was UNSAFE (20/26) [2021-06-14 09:26:58,462 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:26:58,481 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:26:58,481 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:26:58,482 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:26:58,482 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:26:58,482 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:26:58,482 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:26:58,482 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:26:58,482 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread22of24ForFork0======== Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:26:59,625 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:59,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:59,625 INFO L82 PathProgramCache]: Analyzing trace with hash 829991337, now seen corresponding path program 1 times [2021-06-14 09:26:59,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:59,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226116564] [2021-06-14 09:26:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-06-14 09:26:59,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:59,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226116564] [2021-06-14 09:26:59,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226116564] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:59,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:59,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:26:59,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21763464] [2021-06-14 09:26:59,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:26:59,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:59,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:26:59,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:26:59,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:59,636 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:59,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:59,636 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:59,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669 [2021-06-14 09:26:59,783 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1247218006, now seen corresponding path program 1 times [2021-06-14 09:26:59,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:59,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896406327] [2021-06-14 09:26:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:26:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-06-14 09:26:59,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:26:59,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896406327] [2021-06-14 09:26:59,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896406327] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:26:59,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:26:59,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:26:59,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655632158] [2021-06-14 09:26:59,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:26:59,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:26:59,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:26:59,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:26:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:59,823 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:26:59,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:26:59,823 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:59,823 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:26:59,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:26:59,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:26:59,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670 [2021-06-14 09:26:59,992 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:26:59,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:26:59,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2453525, now seen corresponding path program 1 times [2021-06-14 09:26:59,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:26:59,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236159216] [2021-06-14 09:26:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:26:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:59,996 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:26:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:26:59,998 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:00,000 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:27:00,000 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:27:00,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671 [2021-06-14 09:27:00,001 INFO L301 ceAbstractionStarter]: Result for error location fooThread22of24ForFork0 was UNSAFE (21/26) [2021-06-14 09:27:00,001 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:27:00,005 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:27:00,005 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:27:00,005 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:27:00,005 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:27:00,005 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:27:00,005 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:27:00,006 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:27:00,006 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread13of24ForFork0======== [2021-06-14 09:27:01,055 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:01,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:01,055 INFO L82 PathProgramCache]: Analyzing trace with hash 598818293, now seen corresponding path program 1 times [2021-06-14 09:27:01,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:01,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069976759] [2021-06-14 09:27:01,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:27:01,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:01,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069976759] [2021-06-14 09:27:01,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069976759] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:01,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:01,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:27:01,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847702355] [2021-06-14 09:27:01,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:27:01,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:01,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:27:01,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:27:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:01,065 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:01,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:01,065 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:01,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672 [2021-06-14 09:27:01,159 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:01,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:01,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1843582774, now seen corresponding path program 1 times [2021-06-14 09:27:01,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:01,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274206900] [2021-06-14 09:27:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-06-14 09:27:01,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:01,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274206900] [2021-06-14 09:27:01,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274206900] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:01,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:01,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:27:01,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301521364] [2021-06-14 09:27:01,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:27:01,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:01,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:27:01,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:27:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:01,173 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:01,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:01,173 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:01,173 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:27:01,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable673 [2021-06-14 09:27:01,281 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:01,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2054933687, now seen corresponding path program 1 times [2021-06-14 09:27:01,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:01,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135926806] [2021-06-14 09:27:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:01,284 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:01,286 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:01,287 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:27:01,287 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:27:01,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable674 [2021-06-14 09:27:01,288 INFO L301 ceAbstractionStarter]: Result for error location fooThread13of24ForFork0 was UNSAFE (22/26) [2021-06-14 09:27:01,288 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:27:01,292 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:27:01,292 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:27:01,292 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:27:01,292 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:27:01,292 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:27:01,292 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:27:01,292 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:27:01,292 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 09:27:02,146 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 09:27:02,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:02,146 INFO L82 PathProgramCache]: Analyzing trace with hash -807546496, now seen corresponding path program 1 times [2021-06-14 09:27:02,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:02,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223783266] [2021-06-14 09:27:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:02,150 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:02,152 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:02,154 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:27:02,154 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:27:02,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable675 [2021-06-14 09:27:02,154 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (23/26) [2021-06-14 09:27:02,154 WARN L243 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 09:27:02,154 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2021-06-14 09:27:02,181 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 09:27:02,182 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:27:02,189 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:27:02,190 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:27:02,190 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:27:02,190 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:27:02,190 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:27:02,190 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:27:02,190 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:27:02,190 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of25ForFork0======== [2021-06-14 09:27:03,320 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:03,320 INFO L82 PathProgramCache]: Analyzing trace with hash -112560854, now seen corresponding path program 1 times [2021-06-14 09:27:03,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:03,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3819432] [2021-06-14 09:27:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:27:03,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:03,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3819432] [2021-06-14 09:27:03,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3819432] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:03,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:03,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-14 09:27:03,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362098968] [2021-06-14 09:27:03,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:27:03,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:03,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:27:03,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:27:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:03,331 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:03,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:03,331 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:03,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:03,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676 [2021-06-14 09:27:03,810 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:03,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1250592255, now seen corresponding path program 1 times [2021-06-14 09:27:03,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:03,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090089031] [2021-06-14 09:27:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:27:03,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:03,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090089031] [2021-06-14 09:27:03,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090089031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:27:03,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704269869] [2021-06-14 09:27:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 09:27:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:04,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-14 09:27:04,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 09:27:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 09:27:04,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704269869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 09:27:04,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 09:27:04,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-14 09:27:04,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885940565] [2021-06-14 09:27:04,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:27:04,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:04,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:27:04,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:27:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:04,068 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:04,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:04,068 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:04,068 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:27:04,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-06-14 09:27:04,727 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:04,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1941064347, now seen corresponding path program 1 times [2021-06-14 09:27:04,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:04,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494971206] [2021-06-14 09:27:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:04,731 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:04,731 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:04,732 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:27:04,732 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:27:04,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable678 [2021-06-14 09:27:04,733 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of25ForFork0 was UNSAFE (1/27) [2021-06-14 09:27:04,733 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:27:04,738 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:27:04,738 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:27:04,738 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:27:04,738 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:27:04,738 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:27:04,738 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:27:04,739 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:27:04,739 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of25ForFork0======== [2021-06-14 09:27:05,795 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:05,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:05,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1567477498, now seen corresponding path program 1 times [2021-06-14 09:27:05,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:05,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142093823] [2021-06-14 09:27:05,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:27:05,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:05,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142093823] [2021-06-14 09:27:05,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142093823] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:05,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:05,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:27:05,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466487167] [2021-06-14 09:27:05,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:27:05,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:05,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:27:05,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:27:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:05,806 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:05,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:05,806 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:05,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679 [2021-06-14 09:27:05,848 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:05,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1567478459, now seen corresponding path program 1 times [2021-06-14 09:27:05,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:05,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735484156] [2021-06-14 09:27:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 09:27:05,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:05,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735484156] [2021-06-14 09:27:05,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735484156] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:05,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:05,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:27:05,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247232734] [2021-06-14 09:27:05,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:27:05,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:05,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:27:05,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:27:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:05,861 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:05,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:05,861 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:05,861 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:27:06,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680 [2021-06-14 09:27:06,245 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:06,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:06,245 INFO L82 PathProgramCache]: Analyzing trace with hash 429850575, now seen corresponding path program 1 times [2021-06-14 09:27:06,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:06,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890646905] [2021-06-14 09:27:06,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:06,248 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:06,248 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:06,249 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:27:06,249 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:27:06,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681 [2021-06-14 09:27:06,250 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of25ForFork0 was UNSAFE (2/27) [2021-06-14 09:27:06,250 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:27:06,254 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:27:06,254 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:27:06,254 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:27:06,254 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:27:06,254 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:27:06,254 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:27:06,254 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:27:06,255 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-14 09:27:07,233 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (3/27) [2021-06-14 09:27:07,234 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:27:07,240 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:27:07,240 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:27:07,240 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:27:07,240 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:27:07,240 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:27:07,241 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:27:07,241 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:27:07,241 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of25ForFork0======== [2021-06-14 09:27:08,677 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:08,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:08,678 INFO L82 PathProgramCache]: Analyzing trace with hash 698221771, now seen corresponding path program 1 times [2021-06-14 09:27:08,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:08,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549583221] [2021-06-14 09:27:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:27:08,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:08,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549583221] [2021-06-14 09:27:08,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549583221] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:08,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:08,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:27:08,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077586431] [2021-06-14 09:27:08,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:27:08,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:08,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:27:08,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:27:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:08,692 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:08,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:08,692 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:08,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:08,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682 [2021-06-14 09:27:08,741 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:08,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:08,741 INFO L82 PathProgramCache]: Analyzing trace with hash 699145292, now seen corresponding path program 1 times [2021-06-14 09:27:08,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:08,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644958941] [2021-06-14 09:27:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 09:27:08,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:08,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644958941] [2021-06-14 09:27:08,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644958941] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:08,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:08,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:27:08,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809158394] [2021-06-14 09:27:08,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:27:08,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:08,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:27:08,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:27:08,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:08,758 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:08,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:08,758 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:08,758 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:27:08,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable683 [2021-06-14 09:27:08,792 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:08,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:08,793 INFO L82 PathProgramCache]: Analyzing trace with hash 699146253, now seen corresponding path program 1 times [2021-06-14 09:27:08,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:08,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531304135] [2021-06-14 09:27:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:08,796 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:08,796 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:08,797 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:27:08,798 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:27:08,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable684 [2021-06-14 09:27:08,798 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of25ForFork0 was UNSAFE (4/27) [2021-06-14 09:27:08,798 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 09:27:08,806 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:27:08,806 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:27:08,806 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:27:08,806 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:27:08,806 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:27:08,806 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:27:08,806 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:27:08,806 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of25ForFork0======== Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:27:09,917 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:09,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:09,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1261352349, now seen corresponding path program 1 times [2021-06-14 09:27:09,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:09,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630202770] [2021-06-14 09:27:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:27:09,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:09,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630202770] [2021-06-14 09:27:09,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630202770] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:09,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:09,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:27:09,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378111796] [2021-06-14 09:27:09,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:27:09,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:09,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:27:09,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:27:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:09,928 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:09,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:09,928 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:09,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:09,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable685 [2021-06-14 09:27:09,986 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:09,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:09,986 INFO L82 PathProgramCache]: Analyzing trace with hash -2146111266, now seen corresponding path program 1 times [2021-06-14 09:27:09,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:09,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716878813] [2021-06-14 09:27:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 09:27:10,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:10,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716878813] [2021-06-14 09:27:10,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716878813] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:10,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:10,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:27:10,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656266483] [2021-06-14 09:27:10,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:27:10,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:10,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:27:10,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:27:10,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:10,002 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:10,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:10,002 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:10,002 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:27:10,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable686 [2021-06-14 09:27:10,047 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:10,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:10,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2145187745, now seen corresponding path program 1 times [2021-06-14 09:27:10,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:10,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967169014] [2021-06-14 09:27:10,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:10,051 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:10,052 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:10,053 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:27:10,053 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:27:10,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687 [2021-06-14 09:27:10,054 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of25ForFork0 was UNSAFE (5/27) [2021-06-14 09:27:10,054 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:27:10,059 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:27:10,059 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:27:10,059 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:27:10,059 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:27:10,059 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:27:10,059 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:27:10,059 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:27:10,059 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread7of25ForFork0======== [2021-06-14 09:27:11,320 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:11,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:11,321 INFO L82 PathProgramCache]: Analyzing trace with hash 462283223, now seen corresponding path program 1 times [2021-06-14 09:27:11,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:11,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087704896] [2021-06-14 09:27:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:27:11,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:11,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087704896] [2021-06-14 09:27:11,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087704896] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:11,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:11,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:27:11,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316170617] [2021-06-14 09:27:11,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:27:11,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:11,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:27:11,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:27:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:11,332 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:11,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:11,332 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:11,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:11,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable688 [2021-06-14 09:27:11,388 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1345171240, now seen corresponding path program 1 times [2021-06-14 09:27:11,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:11,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88910013] [2021-06-14 09:27:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-06-14 09:27:11,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:11,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88910013] [2021-06-14 09:27:11,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88910013] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:11,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:11,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:27:11,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932709138] [2021-06-14 09:27:11,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:27:11,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:11,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:27:11,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:27:11,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:11,403 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:11,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:11,403 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:11,403 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:27:11,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable689 [2021-06-14 09:27:11,464 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:11,468 INFO L82 PathProgramCache]: Analyzing trace with hash -457667559, now seen corresponding path program 1 times [2021-06-14 09:27:11,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:11,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281973547] [2021-06-14 09:27:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:11,472 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:11,473 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:11,474 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:27:11,474 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:27:11,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690 [2021-06-14 09:27:11,475 INFO L301 ceAbstractionStarter]: Result for error location fooThread7of25ForFork0 was UNSAFE (6/27) [2021-06-14 09:27:11,475 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:27:11,482 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:27:11,482 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:27:11,482 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:27:11,482 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:27:11,482 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:27:11,482 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:27:11,482 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:27:11,482 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of25ForFork0======== [2021-06-14 09:27:12,462 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:12,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:12,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1892036848, now seen corresponding path program 1 times [2021-06-14 09:27:12,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:12,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251419130] [2021-06-14 09:27:12,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:27:12,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:12,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251419130] [2021-06-14 09:27:12,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251419130] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:12,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:12,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:27:12,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176177464] [2021-06-14 09:27:12,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:27:12,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:12,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:27:12,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:27:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:12,472 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:12,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:12,472 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:12,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:12,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691 [2021-06-14 09:27:12,521 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:12,521 INFO L82 PathProgramCache]: Analyzing trace with hash 84582385, now seen corresponding path program 1 times [2021-06-14 09:27:12,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:12,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596098321] [2021-06-14 09:27:12,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 09:27:12,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:12,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596098321] [2021-06-14 09:27:12,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596098321] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:12,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:12,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:27:12,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583437733] [2021-06-14 09:27:12,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:27:12,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:12,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:27:12,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:27:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:12,534 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:12,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:12,534 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:12,534 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:27:12,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692 [2021-06-14 09:27:12,575 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:12,575 INFO L82 PathProgramCache]: Analyzing trace with hash 972086066, now seen corresponding path program 1 times [2021-06-14 09:27:12,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:12,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821168198] [2021-06-14 09:27:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:12,578 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:12,579 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:12,580 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:27:12,580 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:27:12,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693 [2021-06-14 09:27:12,580 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of25ForFork0 was UNSAFE (7/27) [2021-06-14 09:27:12,580 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:27:12,585 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:27:12,585 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:27:12,585 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:27:12,585 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:27:12,585 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:27:12,585 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:27:12,585 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:27:12,585 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread9of25ForFork0======== [2021-06-14 09:27:13,804 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:13,804 INFO L82 PathProgramCache]: Analyzing trace with hash 663226884, now seen corresponding path program 1 times [2021-06-14 09:27:13,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:13,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488161637] [2021-06-14 09:27:13,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:27:13,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:13,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488161637] [2021-06-14 09:27:13,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488161637] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:13,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:13,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 09:27:13,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493797687] [2021-06-14 09:27:13,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-14 09:27:13,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:13,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-14 09:27:13,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-14 09:27:13,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:13,818 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:13,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:13,818 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:13,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable694 [2021-06-14 09:27:13,878 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:13,878 INFO L82 PathProgramCache]: Analyzing trace with hash 369823877, now seen corresponding path program 1 times [2021-06-14 09:27:13,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:13,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554119918] [2021-06-14 09:27:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 09:27:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-06-14 09:27:13,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 09:27:13,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554119918] [2021-06-14 09:27:13,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554119918] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 09:27:13,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 09:27:13,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 09:27:13,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082306389] [2021-06-14 09:27:13,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-14 09:27:13,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 09:27:13,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-14 09:27:13,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-14 09:27:13,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:13,892 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 09:27:13,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 09:27:13,892 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:13,892 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 09:27:13,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-14 09:27:13,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-14 09:27:13,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable695 [2021-06-14 09:27:13,956 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 09:27:13,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 09:27:13,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1427127482, now seen corresponding path program 1 times [2021-06-14 09:27:13,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 09:27:13,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793533076] [2021-06-14 09:27:13,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 09:27:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:13,959 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 09:27:13,960 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 09:27:13,961 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 09:27:13,961 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 09:27:13,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable696 [2021-06-14 09:27:13,961 INFO L301 ceAbstractionStarter]: Result for error location fooThread9of25ForFork0 was UNSAFE (8/27) [2021-06-14 09:27:13,962 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 09:27:17,910 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 09:27:17,910 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 09:27:17,910 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 09:27:17,910 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 09:27:17,910 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 09:27:17,910 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 09:27:17,910 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 09:27:17,910 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of25ForFork0========