/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-NewStatesSleepPersistentFixedOrder-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98196c323137eee61a7c1131837b356358d783d4-98196c3 [2021-06-17 05:57:38,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-17 05:57:38,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-17 05:57:38,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-17 05:57:38,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-17 05:57:38,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-17 05:57:38,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-17 05:57:38,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-17 05:57:38,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-17 05:57:38,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-17 05:57:38,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-17 05:57:38,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-17 05:57:38,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-17 05:57:38,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-17 05:57:38,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-17 05:57:38,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-17 05:57:38,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-17 05:57:38,209 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-NewStatesSleepPersistentFixedOrder-NoLbe.epf [2021-06-17 05:57:38,224 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-17 05:57:38,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-17 05:57:38,225 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-17 05:57:38,225 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-17 05:57:38,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-17 05:57:38,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-17 05:57:38,226 INFO L138 SettingsManager]: * Use SBE=true [2021-06-17 05:57:38,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-17 05:57:38,227 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-17 05:57:38,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-17 05:57:38,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-17 05:57:38,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-17 05:57:38,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-17 05:57:38,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-17 05:57:38,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-17 05:57:38,228 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-17 05:57:38,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-17 05:57:38,228 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-17 05:57:38,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-17 05:57:38,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-17 05:57:38,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-17 05:57:38,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-17 05:57:38,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-17 05:57:38,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-17 05:57:38,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-17 05:57:38,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-17 05:57:38,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-17 05:57:38,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-17 05:57:38,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-17 05:57:38,230 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-17 05:57:38,230 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-06-17 05:57:38,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-17 05:57:38,230 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2021-06-17 05:57:38,231 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-17 05:57:38,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-17 05:57:38,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-17 05:57:38,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-17 05:57:38,533 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-17 05:57:38,534 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-17 05:57:38,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl [2021-06-17 05:57:38,535 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl' [2021-06-17 05:57:38,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-17 05:57:38,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-17 05:57:38,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-17 05:57:38,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-17 05:57:38,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-17 05:57:38,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 05:57:38" (1/1) ... [2021-06-17 05:57:38,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 05:57:38" (1/1) ... [2021-06-17 05:57:38,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-17 05:57:38,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-17 05:57:38,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-17 05:57:38,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-17 05:57:38,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 05:57:38" (1/1) ... [2021-06-17 05:57:38,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 05:57:38" (1/1) ... [2021-06-17 05:57:38,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 05:57:38" (1/1) ... [2021-06-17 05:57:38,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 05:57:38" (1/1) ... [2021-06-17 05:57:38,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 05:57:38" (1/1) ... [2021-06-17 05:57:38,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 05:57:38" (1/1) ... [2021-06-17 05:57:38,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 05:57:38" (1/1) ... [2021-06-17 05:57:38,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-17 05:57:38,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-17 05:57:38,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-17 05:57:38,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-17 05:57:38,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 05:57:38" (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 [2021-06-17 05:57:38,730 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-06-17 05:57:38,730 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-06-17 05:57:38,730 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-06-17 05:57:38,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-17 05:57:38,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-17 05:57:38,731 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-17 05:57:38,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-17 05:57:38,843 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-17 05:57:38,845 INFO L202 PluginConnector]: Adding new model ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.06 05:57:38 BoogieIcfgContainer [2021-06-17 05:57:38,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-17 05:57:38,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-17 05:57:38,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-17 05:57:38,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-17 05:57:38,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 05:57:38" (1/2) ... [2021-06-17 05:57:38,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16414588 and model type ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.06 05:57:38, skipping insertion in model container [2021-06-17 05:57:38,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.06 05:57:38" (2/2) ... [2021-06-17 05:57:38,855 INFO L111 eAbstractionObserver]: Analyzing ICFG ForkInLoop02-Incrementer.bpl [2021-06-17 05:57:38,862 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-17 05:57:38,862 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-17 05:57:38,862 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-17 05:57:38,863 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-17 05:57:38,894 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 05:57:38,924 INFO L255 AbstractCegarLoop]: 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 [2021-06-17 05:57:38,978 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:38,978 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:38,978 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:38,978 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:38,978 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:38,979 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:38,979 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:38,980 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of1ForFork0======== [2021-06-17 05:57:39,030 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:39,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1794996862, now seen corresponding path program 1 times [2021-06-17 05:57:39,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:39,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444161206] [2021-06-17 05:57:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:39,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:39,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444161206] [2021-06-17 05:57:39,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444161206] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:39,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:39,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 05:57:39,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10355686] [2021-06-17 05:57:39,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:39,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:39,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:39,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:39,180 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:39,182 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) [2021-06-17 05:57:39,182 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:39,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-17 05:57:39,242 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of1ForFork0 was SAFE (1/3) [2021-06-17 05:57:39,243 INFO L255 AbstractCegarLoop]: 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) [2021-06-17 05:57:39,281 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:39,281 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:39,281 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:39,281 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:39,281 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:39,281 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:39,281 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:39,281 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 05:57:39,298 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (2/3) [2021-06-17 05:57:39,299 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 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 [2021-06-17 05:57:39,309 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:39,309 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:39,309 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:39,310 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:39,310 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:39,310 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:39,310 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:39,310 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-17 05:57:39,313 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:57:39,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:39,313 INFO L82 PathProgramCache]: Analyzing trace with hash 42091268, now seen corresponding path program 1 times [2021-06-17 05:57:39,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:39,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550141230] [2021-06-17 05:57:39,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:39,318 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:39,325 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:39,335 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:39,336 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:39,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-17 05:57:39,343 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (3/3) [2021-06-17 05:57:39,343 WARN L243 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-17 05:57:39,343 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-17 05:57:39,359 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 05:57:39,359 INFO L255 AbstractCegarLoop]: 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 [2021-06-17 05:57:39,367 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:39,367 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:39,367 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:39,367 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:39,367 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:39,367 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:39,367 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:39,367 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-17 05:57:39,464 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (1/4) [2021-06-17 05:57:39,464 INFO L255 AbstractCegarLoop]: 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 05:57:39,469 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:39,469 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:39,469 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:39,469 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:39,469 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:39,469 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:39,469 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:39,469 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-17 05:57:39,511 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:57:39,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:39,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1869698797, now seen corresponding path program 1 times [2021-06-17 05:57:39,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:39,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985280040] [2021-06-17 05:57:39,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:39,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:39,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985280040] [2021-06-17 05:57:39,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985280040] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:39,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:39,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:57:39,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030673213] [2021-06-17 05:57:39,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:39,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:39,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:39,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:39,530 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:39,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) 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) [2021-06-17 05:57:39,530 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:39,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:39,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-17 05:57:39,580 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:57:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:39,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2126820620, now seen corresponding path program 1 times [2021-06-17 05:57:39,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:39,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448552371] [2021-06-17 05:57:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:39,585 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:39,588 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:39,590 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:39,590 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:39,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-17 05:57:39,592 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (2/4) [2021-06-17 05:57:39,592 WARN L243 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-17 05:57:39,592 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-17 05:57:39,619 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 05:57:39,619 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 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 [2021-06-17 05:57:39,631 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:39,631 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:39,631 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:39,631 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:39,631 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:39,631 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:39,631 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:39,631 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of3ForFork0======== [2021-06-17 05:57:39,687 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:39,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:39,687 INFO L82 PathProgramCache]: Analyzing trace with hash 241543071, now seen corresponding path program 1 times [2021-06-17 05:57:39,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:39,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472724887] [2021-06-17 05:57:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:39,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:39,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472724887] [2021-06-17 05:57:39,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472724887] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:39,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:39,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:57:39,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845943012] [2021-06-17 05:57:39,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:39,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:39,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:39,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:39,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:39,706 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:39,706 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) [2021-06-17 05:57:39,706 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:39,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:39,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-17 05:57:39,720 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:39,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:39,721 INFO L82 PathProgramCache]: Analyzing trace with hash -279423782, now seen corresponding path program 1 times [2021-06-17 05:57:39,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:39,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314049953] [2021-06-17 05:57:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:39,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:39,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314049953] [2021-06-17 05:57:39,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314049953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:39,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036573438] [2021-06-17 05:57:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:39,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:57:39,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:57:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:39,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036573438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:39,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:57:39,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-17 05:57:39,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37183985] [2021-06-17 05:57:39,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:57:39,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:39,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:57:39,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:57:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:39,910 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:39,910 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) [2021-06-17 05:57:39,910 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:39,910 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:57:40,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:40,175 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:40,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:40,175 INFO L82 PathProgramCache]: Analyzing trace with hash -567773713, now seen corresponding path program 1 times [2021-06-17 05:57:40,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:40,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764835980] [2021-06-17 05:57:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:40,189 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:40,202 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:40,204 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:40,204 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:40,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-17 05:57:40,213 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of3ForFork0 was UNSAFE (1/5) [2021-06-17 05:57:40,214 INFO L255 AbstractCegarLoop]: 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 [2021-06-17 05:57:40,226 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:40,226 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:40,226 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:40,226 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:40,226 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:40,226 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:40,226 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:40,226 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of3ForFork0======== [2021-06-17 05:57:40,291 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:40,292 INFO L82 PathProgramCache]: Analyzing trace with hash 792606646, now seen corresponding path program 1 times [2021-06-17 05:57:40,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:40,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437521588] [2021-06-17 05:57:40,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 05:57:40,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:40,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437521588] [2021-06-17 05:57:40,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437521588] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:40,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:40,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:57:40,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911946452] [2021-06-17 05:57:40,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:40,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:40,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:40,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:40,309 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:40,309 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) [2021-06-17 05:57:40,309 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:40,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-17 05:57:40,329 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:40,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:40,330 INFO L82 PathProgramCache]: Analyzing trace with hash -799944847, now seen corresponding path program 1 times [2021-06-17 05:57:40,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:40,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644650620] [2021-06-17 05:57:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:40,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:40,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644650620] [2021-06-17 05:57:40,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644650620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:40,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945442561] [2021-06-17 05:57:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:40,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:57:40,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:57:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:40,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945442561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:40,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:57:40,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 05:57:40,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109394584] [2021-06-17 05:57:40,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:57:40,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:40,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:57:40,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:57:40,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:40,436 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:40,436 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) [2021-06-17 05:57:40,437 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:40,437 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:40,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:57:40,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:40,673 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:40,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:40,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1537446450, now seen corresponding path program 1 times [2021-06-17 05:57:40,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:40,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781871418] [2021-06-17 05:57:40,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:40,679 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:40,682 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:40,684 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:40,684 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:40,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-17 05:57:40,685 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of3ForFork0 was UNSAFE (2/5) [2021-06-17 05:57:40,685 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 05:57:40,689 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:40,689 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:40,689 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:40,689 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:40,689 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:40,690 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:40,690 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:40,690 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-17 05:57:40,948 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (3/5) [2021-06-17 05:57:40,948 INFO L255 AbstractCegarLoop]: 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 [2021-06-17 05:57:40,953 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:40,953 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:40,953 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:40,953 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:40,953 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:40,953 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:40,953 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:40,953 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of3ForFork0======== [2021-06-17 05:57:41,002 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:41,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:41,002 INFO L82 PathProgramCache]: Analyzing trace with hash -459303287, now seen corresponding path program 1 times [2021-06-17 05:57:41,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:41,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719821801] [2021-06-17 05:57:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:41,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:41,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719821801] [2021-06-17 05:57:41,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719821801] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:41,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:41,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 05:57:41,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611768175] [2021-06-17 05:57:41,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:41,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:41,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:41,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:41,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:41,022 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:41,022 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) [2021-06-17 05:57:41,022 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:41,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:41,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-17 05:57:41,090 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:41,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:41,090 INFO L82 PathProgramCache]: Analyzing trace with hash -612138506, now seen corresponding path program 1 times [2021-06-17 05:57:41,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:41,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922765290] [2021-06-17 05:57:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:41,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:41,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922765290] [2021-06-17 05:57:41,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922765290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:41,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650435092] [2021-06-17 05:57:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-17 05:57:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:41,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:57:41,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:41,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650435092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:41,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:57:41,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 05:57:41,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782550625] [2021-06-17 05:57:41,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:57:41,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:41,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:57:41,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:57:41,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:41,211 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:41,211 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) [2021-06-17 05:57:41,211 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:41,211 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:41,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:41,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:57:41,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:41,509 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:41,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:41,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1230491691, now seen corresponding path program 1 times [2021-06-17 05:57:41,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:41,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284444318] [2021-06-17 05:57:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:41,514 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:41,517 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:41,518 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:41,518 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:41,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-17 05:57:41,519 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of3ForFork0 was UNSAFE (4/5) [2021-06-17 05:57:41,519 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 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 [2021-06-17 05:57:41,546 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:41,546 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:41,546 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:41,546 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:41,546 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:41,546 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:41,546 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:41,547 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-17 05:57:41,590 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:57:41,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:41,590 INFO L82 PathProgramCache]: Analyzing trace with hash 197472612, now seen corresponding path program 1 times [2021-06-17 05:57:41,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:41,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589177455] [2021-06-17 05:57:41,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 05:57:41,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:41,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589177455] [2021-06-17 05:57:41,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589177455] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:41,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:41,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:57:41,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921453070] [2021-06-17 05:57:41,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:41,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:41,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:41,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:41,603 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:41,603 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) [2021-06-17 05:57:41,603 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:41,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:41,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-17 05:57:41,614 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:57:41,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:41,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2059500511, now seen corresponding path program 1 times [2021-06-17 05:57:41,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:41,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071900888] [2021-06-17 05:57:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:41,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:41,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071900888] [2021-06-17 05:57:41,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071900888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:41,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033157373] [2021-06-17 05:57:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:41,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:57:41,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:57:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:41,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033157373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:41,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:57:41,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 05:57:41,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526093677] [2021-06-17 05:57:41,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:57:41,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:41,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:57:41,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:57:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:41,748 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:41,748 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) [2021-06-17 05:57:41,748 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:41,748 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:57:41,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:41,978 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:57:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:41,979 INFO L82 PathProgramCache]: Analyzing trace with hash -579405088, now seen corresponding path program 1 times [2021-06-17 05:57:41,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:41,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154238015] [2021-06-17 05:57:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:41,982 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:41,985 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:41,986 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:41,986 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:41,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-17 05:57:41,987 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (5/5) [2021-06-17 05:57:41,987 WARN L243 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-17 05:57:41,987 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-17 05:57:41,992 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 05:57:41,993 INFO L255 AbstractCegarLoop]: 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) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 05:57:41,998 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:41,998 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:41,998 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:41,998 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:41,998 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:41,998 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:41,998 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:41,998 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-17 05:57:42,489 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (1/6) [2021-06-17 05:57:42,489 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 05:57:42,528 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:42,528 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:42,528 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:42,528 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:42,528 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:42,529 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:42,529 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:42,529 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-17 05:57:42,592 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:57:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:42,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1250296233, now seen corresponding path program 1 times [2021-06-17 05:57:42,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:42,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594193903] [2021-06-17 05:57:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 05:57:42,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:42,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594193903] [2021-06-17 05:57:42,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594193903] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:42,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:42,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:57:42,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003097224] [2021-06-17 05:57:42,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:42,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:42,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:42,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:42,616 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:42,616 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) [2021-06-17 05:57:42,616 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:42,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-17 05:57:42,634 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:57:42,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:42,635 INFO L82 PathProgramCache]: Analyzing trace with hash 926756139, now seen corresponding path program 1 times [2021-06-17 05:57:42,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:42,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629540348] [2021-06-17 05:57:42,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 05:57:42,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:42,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629540348] [2021-06-17 05:57:42,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629540348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:42,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074073689] [2021-06-17 05:57:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:42,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:57:42,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:57:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 05:57:42,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074073689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:42,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:57:42,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 05:57:42,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858786502] [2021-06-17 05:57:42,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:57:42,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:42,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:57:42,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:57:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:42,779 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:42,779 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) [2021-06-17 05:57:42,779 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:42,779 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:42,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:57:43,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-17 05:57:43,025 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:57:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:43,025 INFO L82 PathProgramCache]: Analyzing trace with hash 305674225, now seen corresponding path program 1 times [2021-06-17 05:57:43,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:43,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255550485] [2021-06-17 05:57:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:43,029 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:43,032 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:43,033 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:43,033 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:43,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-17 05:57:43,034 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (2/6) [2021-06-17 05:57:43,034 WARN L243 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-17 05:57:43,034 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-06-17 05:57:43,040 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 05:57:43,041 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 05:57:43,045 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:43,045 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:43,045 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:43,045 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:43,045 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:43,045 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:43,045 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:43,045 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of5ForFork0======== [2021-06-17 05:57:43,108 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:43,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:43,109 INFO L82 PathProgramCache]: Analyzing trace with hash 972940806, now seen corresponding path program 1 times [2021-06-17 05:57:43,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:43,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897848889] [2021-06-17 05:57:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:43,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:43,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:43,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897848889] [2021-06-17 05:57:43,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897848889] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:43,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:43,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:57:43,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630760860] [2021-06-17 05:57:43,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:43,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:43,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:43,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:43,122 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:43,122 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) [2021-06-17 05:57:43,122 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:43,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:43,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-17 05:57:43,131 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:43,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:43,132 INFO L82 PathProgramCache]: Analyzing trace with hash 582907934, now seen corresponding path program 1 times [2021-06-17 05:57:43,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:43,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979695574] [2021-06-17 05:57:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:43,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:43,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979695574] [2021-06-17 05:57:43,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979695574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:43,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386350969] [2021-06-17 05:57:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-17 05:57:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:43,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:57:43,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:43,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386350969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:43,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:57:43,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-17 05:57:43,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348712830] [2021-06-17 05:57:43,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:57:43,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:43,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:57:43,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:57:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:43,196 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:43,197 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) [2021-06-17 05:57:43,197 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:43,197 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:57:43,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:43,651 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:43,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:43,651 INFO L82 PathProgramCache]: Analyzing trace with hash 964423174, now seen corresponding path program 1 times [2021-06-17 05:57:43,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:43,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751322968] [2021-06-17 05:57:43,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:43,654 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:43,656 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:43,657 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:43,657 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:43,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-17 05:57:43,658 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of5ForFork0 was UNSAFE (1/7) [2021-06-17 05:57:43,659 INFO L255 AbstractCegarLoop]: 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 [2021-06-17 05:57:43,663 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:43,663 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:43,663 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:43,663 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:43,663 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:43,663 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:43,663 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:43,663 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of5ForFork0======== [2021-06-17 05:57:43,722 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:43,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:43,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1551730264, now seen corresponding path program 1 times [2021-06-17 05:57:43,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:43,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540442147] [2021-06-17 05:57:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:43,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:43,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540442147] [2021-06-17 05:57:43,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540442147] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:43,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:43,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 05:57:43,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835833971] [2021-06-17 05:57:43,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:43,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:43,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:43,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:43,734 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:43,734 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) [2021-06-17 05:57:43,735 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:44,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:44,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-17 05:57:44,878 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:44,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1176062694, now seen corresponding path program 1 times [2021-06-17 05:57:44,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:44,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703150691] [2021-06-17 05:57:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:44,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:44,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703150691] [2021-06-17 05:57:44,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703150691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:44,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447675699] [2021-06-17 05:57:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:45,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:57:45,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:57:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:45,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447675699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:45,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:57:45,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 05:57:45,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314103493] [2021-06-17 05:57:45,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:57:45,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:45,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:57:45,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:57:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:45,023 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:45,023 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) [2021-06-17 05:57:45,023 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:45,023 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:46,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:57:46,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-17 05:57:46,221 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:46,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1753920920, now seen corresponding path program 1 times [2021-06-17 05:57:46,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:46,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403213175] [2021-06-17 05:57:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:46,224 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:46,226 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:46,228 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:46,228 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:46,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-17 05:57:46,229 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of5ForFork0 was UNSAFE (2/7) [2021-06-17 05:57:46,229 INFO L255 AbstractCegarLoop]: 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 [2021-06-17 05:57:46,233 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:46,234 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:46,234 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:46,234 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:46,234 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:46,234 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:46,234 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:46,234 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of5ForFork0======== [2021-06-17 05:57:46,298 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:46,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:46,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1052605669, now seen corresponding path program 1 times [2021-06-17 05:57:46,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:46,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927797283] [2021-06-17 05:57:46,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 05:57:46,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:46,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927797283] [2021-06-17 05:57:46,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927797283] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:46,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:46,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:57:46,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342951167] [2021-06-17 05:57:46,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:46,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:46,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:46,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:46,310 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:46,310 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) [2021-06-17 05:57:46,310 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:46,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-17 05:57:46,324 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:46,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:46,324 INFO L82 PathProgramCache]: Analyzing trace with hash -768130307, now seen corresponding path program 1 times [2021-06-17 05:57:46,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:46,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123258596] [2021-06-17 05:57:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:46,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:46,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123258596] [2021-06-17 05:57:46,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123258596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:46,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440324173] [2021-06-17 05:57:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:46,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:57:46,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:57:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:46,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440324173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:46,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:57:46,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 05:57:46,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752408160] [2021-06-17 05:57:46,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:57:46,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:46,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:57:46,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:57:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:46,444 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:46,444 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) [2021-06-17 05:57:46,444 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:46,444 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:57:46,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-17 05:57:46,679 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:46,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:46,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1992918931, now seen corresponding path program 1 times [2021-06-17 05:57:46,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:46,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23765072] [2021-06-17 05:57:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:46,682 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:46,684 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:46,685 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:46,719 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:46,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-17 05:57:46,720 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of5ForFork0 was UNSAFE (3/7) [2021-06-17 05:57:46,720 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 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 [2021-06-17 05:57:46,731 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:46,731 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:46,731 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:46,732 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:46,732 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:46,732 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:46,732 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:46,732 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of5ForFork0======== [2021-06-17 05:57:46,818 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:46,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:46,818 INFO L82 PathProgramCache]: Analyzing trace with hash 627789222, now seen corresponding path program 1 times [2021-06-17 05:57:46,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:46,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296611209] [2021-06-17 05:57:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-17 05:57:46,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:46,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296611209] [2021-06-17 05:57:46,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296611209] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:46,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:46,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:57:46,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082574026] [2021-06-17 05:57:46,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:46,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:46,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:46,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:46,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:46,832 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:46,832 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) [2021-06-17 05:57:46,832 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:46,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-17 05:57:46,850 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:46,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:46,850 INFO L82 PathProgramCache]: Analyzing trace with hash 69827518, now seen corresponding path program 1 times [2021-06-17 05:57:46,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:46,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743496094] [2021-06-17 05:57:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 05:57:46,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:46,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743496094] [2021-06-17 05:57:46,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743496094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:46,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996225837] [2021-06-17 05:57:46,876 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 [2021-06-17 05:57:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:46,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:57:46,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:57:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 05:57:46,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996225837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:46,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:57:46,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 05:57:46,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266195690] [2021-06-17 05:57:46,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:57:46,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:46,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:57:46,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:57:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:46,949 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:46,949 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) [2021-06-17 05:57:46,949 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:46,949 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:46,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:46,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:57:47,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:47,190 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:47,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:47,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1427390766, now seen corresponding path program 1 times [2021-06-17 05:57:47,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:47,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312696136] [2021-06-17 05:57:47,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:47,194 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:47,196 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:47,197 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:47,197 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:47,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-17 05:57:47,198 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of5ForFork0 was UNSAFE (4/7) [2021-06-17 05:57:47,198 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-17 05:57:47,208 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:47,208 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:47,208 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:47,208 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:47,208 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:47,208 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:47,208 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:47,208 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 05:57:50,454 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (5/7) [2021-06-17 05:57:50,455 INFO L255 AbstractCegarLoop]: 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 [2021-06-17 05:57:50,461 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:50,461 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:50,461 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:50,461 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:50,461 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:50,461 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:50,461 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:50,461 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-17 05:57:50,520 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:57:50,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:50,521 INFO L82 PathProgramCache]: Analyzing trace with hash -352418948, now seen corresponding path program 1 times [2021-06-17 05:57:50,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:50,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713002635] [2021-06-17 05:57:50,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-17 05:57:50,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:50,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713002635] [2021-06-17 05:57:50,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713002635] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:50,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:50,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:57:50,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951644863] [2021-06-17 05:57:50,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:50,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:50,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:50,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:50,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:50,534 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:50,534 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) [2021-06-17 05:57:50,534 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:50,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-17 05:57:50,554 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:57:50,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:50,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1193367444, now seen corresponding path program 1 times [2021-06-17 05:57:50,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:50,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709015859] [2021-06-17 05:57:50,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 05:57:50,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:50,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709015859] [2021-06-17 05:57:50,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709015859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:50,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285653227] [2021-06-17 05:57:50,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:50,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:57:50,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:57:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 05:57:50,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285653227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:50,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:57:50,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 05:57:50,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205674267] [2021-06-17 05:57:50,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:57:50,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:50,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:57:50,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:57:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:50,643 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:50,643 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) [2021-06-17 05:57:50,643 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:50,643 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:50,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:50,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:57:50,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:50,885 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:57:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:50,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1373550852, now seen corresponding path program 1 times [2021-06-17 05:57:50,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:50,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855521225] [2021-06-17 05:57:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:50,889 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:50,895 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:50,898 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:50,898 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:50,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-17 05:57:50,901 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (6/7) [2021-06-17 05:57:50,901 WARN L243 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-17 05:57:50,901 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-06-17 05:57:50,910 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 05:57:50,912 INFO L255 AbstractCegarLoop]: 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 [2021-06-17 05:57:50,949 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:50,949 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:50,949 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:50,949 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:50,949 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:50,949 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:50,949 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:50,949 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of6ForFork0======== [2021-06-17 05:57:51,061 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:51,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1091813917, now seen corresponding path program 1 times [2021-06-17 05:57:51,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:51,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408658438] [2021-06-17 05:57:51,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-17 05:57:51,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:51,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408658438] [2021-06-17 05:57:51,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408658438] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:51,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:51,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:57:51,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878152259] [2021-06-17 05:57:51,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:51,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:51,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:51,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:51,095 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:51,095 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) [2021-06-17 05:57:51,095 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:51,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:51,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-17 05:57:51,131 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:51,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:51,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1534734696, now seen corresponding path program 1 times [2021-06-17 05:57:51,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:51,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81829553] [2021-06-17 05:57:51,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-17 05:57:51,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:51,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81829553] [2021-06-17 05:57:51,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81829553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:51,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441070123] [2021-06-17 05:57:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:51,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:57:51,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:57:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-17 05:57:51,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441070123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:51,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:57:51,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 05:57:51,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327194869] [2021-06-17 05:57:51,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:57:51,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:51,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:57:51,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:57:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:51,235 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:51,235 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) [2021-06-17 05:57:51,235 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:51,236 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:51,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:51,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:57:51,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:51,476 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:51,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:51,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1685697149, now seen corresponding path program 1 times [2021-06-17 05:57:51,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:51,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389609404] [2021-06-17 05:57:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:51,493 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:51,495 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:51,496 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:51,496 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:51,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-17 05:57:51,497 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of6ForFork0 was UNSAFE (1/8) [2021-06-17 05:57:51,497 INFO L255 AbstractCegarLoop]: 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 [2021-06-17 05:57:51,512 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:51,512 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:51,512 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:51,512 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:51,512 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:51,512 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:51,512 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:51,512 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of6ForFork0======== [2021-06-17 05:57:51,649 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:51,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:51,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1979549891, now seen corresponding path program 1 times [2021-06-17 05:57:51,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:51,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906790692] [2021-06-17 05:57:51,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-17 05:57:51,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:51,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906790692] [2021-06-17 05:57:51,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906790692] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:51,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:51,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:57:51,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548036566] [2021-06-17 05:57:51,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:51,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:51,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:51,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:51,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:51,674 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:51,674 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) [2021-06-17 05:57:51,674 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:51,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:51,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-06-17 05:57:51,703 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:51,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:51,703 INFO L82 PathProgramCache]: Analyzing trace with hash 28898626, now seen corresponding path program 1 times [2021-06-17 05:57:51,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:51,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718186758] [2021-06-17 05:57:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 05:57:51,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:51,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718186758] [2021-06-17 05:57:51,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718186758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:51,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679866152] [2021-06-17 05:57:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:51,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:57:51,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:57:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 05:57:51,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679866152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:51,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:57:51,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 05:57:51,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331418268] [2021-06-17 05:57:51,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:57:51,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:51,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:57:51,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:57:51,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:51,784 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:51,784 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) [2021-06-17 05:57:51,784 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:51,784 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:57:52,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-17 05:57:52,028 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:52,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1873455395, now seen corresponding path program 1 times [2021-06-17 05:57:52,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:52,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337491998] [2021-06-17 05:57:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:52,032 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:52,034 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:52,035 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:52,035 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:52,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-17 05:57:52,035 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of6ForFork0 was UNSAFE (2/8) [2021-06-17 05:57:52,036 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 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 [2021-06-17 05:57:52,053 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:52,054 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:52,054 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:52,054 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:52,054 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:52,054 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:52,054 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:52,054 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of6ForFork0======== [2021-06-17 05:57:52,123 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:52,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:52,124 INFO L82 PathProgramCache]: Analyzing trace with hash -205179311, now seen corresponding path program 1 times [2021-06-17 05:57:52,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:52,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771865916] [2021-06-17 05:57:52,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:52,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:52,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771865916] [2021-06-17 05:57:52,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771865916] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:52,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:52,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:57:52,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589957819] [2021-06-17 05:57:52,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:52,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:52,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:52,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:52,134 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:52,134 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) [2021-06-17 05:57:52,134 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:52,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:52,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-17 05:57:52,142 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:52,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:52,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1460874282, now seen corresponding path program 1 times [2021-06-17 05:57:52,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:52,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835818615] [2021-06-17 05:57:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:52,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:52,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835818615] [2021-06-17 05:57:52,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835818615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:52,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283836991] [2021-06-17 05:57:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:57:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:52,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:57:52,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:57:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:52,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283836991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:57:52,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:57:52,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-17 05:57:52,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873905531] [2021-06-17 05:57:52,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:57:52,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:52,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:57:52,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:57:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:52,225 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:52,226 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) [2021-06-17 05:57:52,226 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:52,226 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:57:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:57:54,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-17 05:57:54,109 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:54,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:54,109 INFO L82 PathProgramCache]: Analyzing trace with hash 329950221, now seen corresponding path program 1 times [2021-06-17 05:57:54,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:54,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744457477] [2021-06-17 05:57:54,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:54,133 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:57:54,134 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:57:54,139 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:57:54,139 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:57:54,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-17 05:57:54,145 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of6ForFork0 was UNSAFE (3/8) [2021-06-17 05:57:54,145 INFO L255 AbstractCegarLoop]: 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 [2021-06-17 05:57:54,164 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:57:54,165 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:57:54,165 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:57:54,165 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:57:54,165 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:57:54,165 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:57:54,165 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:57:54,165 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of6ForFork0======== [2021-06-17 05:57:54,238 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:57:54,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:57:54,238 INFO L82 PathProgramCache]: Analyzing trace with hash 485242799, now seen corresponding path program 1 times [2021-06-17 05:57:54,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:57:54,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62054677] [2021-06-17 05:57:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:57:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:57:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:57:54,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:57:54,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62054677] [2021-06-17 05:57:54,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62054677] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:57:54,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:57:54,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 05:57:54,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589439493] [2021-06-17 05:57:54,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:57:54,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:57:54,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:57:54,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:57:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:57:54,248 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:57:54,248 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) [2021-06-17 05:57:54,248 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:58:04,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-17 05:58:04,502 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:58:04,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:58:04,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1085918154, now seen corresponding path program 1 times [2021-06-17 05:58:04,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:58:04,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738512128] [2021-06-17 05:58:04,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:58:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:58:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:58:04,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:58:04,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738512128] [2021-06-17 05:58:04,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738512128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:58:04,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842123431] [2021-06-17 05:58:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:58:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:58:04,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:58:04,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:58:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:58:04,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842123431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:58:04,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:58:04,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 05:58:04,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77377129] [2021-06-17 05:58:04,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:58:04,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:58:04,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:58:04,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:58:04,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:04,573 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:58:04,573 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) [2021-06-17 05:58:04,573 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:58:04,574 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:58:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:58:13,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-17 05:58:13,265 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:58:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:58:13,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1158762863, now seen corresponding path program 1 times [2021-06-17 05:58:13,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:58:13,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524538276] [2021-06-17 05:58:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:58:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:58:13,267 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:58:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:58:13,268 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:58:13,269 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:58:13,269 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:58:13,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-17 05:58:13,270 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of6ForFork0 was UNSAFE (4/8) [2021-06-17 05:58:13,270 INFO L255 AbstractCegarLoop]: 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) [2021-06-17 05:58:13,302 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:58:13,302 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:58:13,302 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:58:13,302 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:58:13,302 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:58:13,302 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:58:13,302 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:58:13,302 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 05:58:48,518 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (5/8) [2021-06-17 05:58:48,519 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 05:58:48,523 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:58:48,523 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:58:48,523 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:58:48,523 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:58:48,523 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:58:48,523 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:58:48,523 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:58:48,523 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of6ForFork0======== [2021-06-17 05:58:48,597 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:58:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:58:48,597 INFO L82 PathProgramCache]: Analyzing trace with hash -813195916, now seen corresponding path program 1 times [2021-06-17 05:58:48,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:58:48,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212903555] [2021-06-17 05:58:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:58:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:58:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 05:58:48,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:58:48,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212903555] [2021-06-17 05:58:48,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212903555] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:58:48,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:58:48,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:58:48,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740906438] [2021-06-17 05:58:48,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:58:48,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:58:48,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:58:48,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:58:48,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:48,607 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:58:48,607 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) [2021-06-17 05:58:48,607 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:48,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:58:48,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-17 05:58:48,618 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:58:48,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:58:48,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1156247673, now seen corresponding path program 1 times [2021-06-17 05:58:48,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:58:48,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961432338] [2021-06-17 05:58:48,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:58:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:58:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:58:48,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:58:48,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961432338] [2021-06-17 05:58:48,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961432338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:58:48,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222302776] [2021-06-17 05:58:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:58:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:58:48,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:58:48,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:58:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 05:58:48,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222302776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:58:48,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:58:48,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 05:58:48,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141109529] [2021-06-17 05:58:48,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:58:48,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:58:48,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:58:48,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:58:48,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:48,898 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:58:48,898 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) [2021-06-17 05:58:48,898 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:58:48,898 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:58:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:58:49,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-17 05:58:49,127 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:58:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:58:49,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1946426644, now seen corresponding path program 1 times [2021-06-17 05:58:49,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:58:49,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485564308] [2021-06-17 05:58:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:58:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:58:49,129 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:58:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:58:49,131 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:58:49,136 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:58:49,137 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:58:49,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-06-17 05:58:49,140 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of6ForFork0 was UNSAFE (6/8) [2021-06-17 05:58:49,140 INFO L255 AbstractCegarLoop]: 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 [2021-06-17 05:58:49,149 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:58:49,149 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:58:49,149 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:58:49,149 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:58:49,149 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:58:49,149 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:58:49,149 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:58:49,149 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-17 05:58:49,227 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:58:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:58:49,228 INFO L82 PathProgramCache]: Analyzing trace with hash 329589789, now seen corresponding path program 1 times [2021-06-17 05:58:49,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:58:49,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545999267] [2021-06-17 05:58:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:58:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:58:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-17 05:58:49,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:58:49,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545999267] [2021-06-17 05:58:49,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545999267] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:58:49,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:58:49,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:58:49,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058044780] [2021-06-17 05:58:49,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:58:49,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:58:49,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:58:49,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:58:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:49,239 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:58:49,239 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) [2021-06-17 05:58:49,239 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:49,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:58:49,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-06-17 05:58:49,261 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:58:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:58:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2008298722, now seen corresponding path program 1 times [2021-06-17 05:58:49,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:58:49,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705647374] [2021-06-17 05:58:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:58:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:58:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-17 05:58:49,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:58:49,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705647374] [2021-06-17 05:58:49,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705647374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:58:49,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480519278] [2021-06-17 05:58:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:58:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:58:49,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:58:49,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:58:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-17 05:58:49,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480519278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:58:49,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:58:49,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 05:58:49,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354751395] [2021-06-17 05:58:49,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:58:49,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:58:49,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:58:49,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:58:49,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:49,425 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:58:49,425 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) [2021-06-17 05:58:49,425 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:58:49,425 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:49,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:58:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:58:49,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:58:49,653 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 05:58:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:58:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash -792814659, now seen corresponding path program 1 times [2021-06-17 05:58:49,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:58:49,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371209714] [2021-06-17 05:58:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:58:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:58:49,656 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:58:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:58:49,658 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:58:49,659 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:58:49,659 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:58:49,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-06-17 05:58:49,659 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (7/8) [2021-06-17 05:58:49,659 WARN L243 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-17 05:58:49,659 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-06-17 05:58:49,668 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 05:58:49,669 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 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 [2021-06-17 05:58:49,706 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:58:49,706 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:58:49,706 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:58:49,706 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:58:49,706 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:58:49,706 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:58:49,706 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:58:49,706 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of7ForFork0======== [2021-06-17 05:58:49,810 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:58:49,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:58:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1396228345, now seen corresponding path program 1 times [2021-06-17 05:58:49,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:58:49,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769689178] [2021-06-17 05:58:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:58:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:58:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-17 05:58:49,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:58:49,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769689178] [2021-06-17 05:58:49,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769689178] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 05:58:49,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 05:58:49,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 05:58:49,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371704514] [2021-06-17 05:58:49,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 05:58:49,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:58:49,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 05:58:49,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 05:58:49,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:49,822 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:58:49,822 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) [2021-06-17 05:58:49,822 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:58:49,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-06-17 05:58:49,844 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:58:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:58:49,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1318584374, now seen corresponding path program 1 times [2021-06-17 05:58:49,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:58:49,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150211940] [2021-06-17 05:58:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:58:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:58:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 05:58:49,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 05:58:49,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150211940] [2021-06-17 05:58:49,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150211940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:58:49,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658769021] [2021-06-17 05:58:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:58:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 05:58:49,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 05:58:49,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 05:58:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 05:58:49,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658769021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 05:58:49,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 05:58:49,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 05:58:49,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344600052] [2021-06-17 05:58:49,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 05:58:49,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 05:58:49,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 05:58:49,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 05:58:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:49,920 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 05:58:49,920 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) [2021-06-17 05:58:49,920 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:58:49,920 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 05:58:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 05:58:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 05:58:50,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 05:58:50,164 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 05:58:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 05:58:50,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1605683865, now seen corresponding path program 1 times [2021-06-17 05:58:50,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 05:58:50,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847752973] [2021-06-17 05:58:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 05:58:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:58:50,168 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:58:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 05:58:50,170 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 05:58:50,171 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 05:58:50,172 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 05:58:50,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-06-17 05:58:50,172 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of7ForFork0 was UNSAFE (1/9) [2021-06-17 05:58:50,173 INFO L255 AbstractCegarLoop]: 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) [2021-06-17 05:58:50,207 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 05:58:50,207 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 05:58:50,207 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 05:58:50,207 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 05:58:50,207 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 05:58:50,207 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 05:58:50,207 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 05:58:50,207 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 06:07:25,482 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (2/9) [2021-06-17 06:07:25,483 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 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 [2021-06-17 06:07:25,487 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 06:07:25,487 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 06:07:25,487 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 06:07:25,487 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 06:07:25,487 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 06:07:25,487 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 06:07:25,487 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 06:07:25,487 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of7ForFork0======== [2021-06-17 06:07:25,594 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 06:07:25,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 06:07:25,594 INFO L82 PathProgramCache]: Analyzing trace with hash 2131961473, now seen corresponding path program 1 times [2021-06-17 06:07:25,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 06:07:25,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179573528] [2021-06-17 06:07:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 06:07:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 06:07:25,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 06:07:25,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179573528] [2021-06-17 06:07:25,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179573528] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 06:07:25,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 06:07:25,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 06:07:25,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441659390] [2021-06-17 06:07:25,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 06:07:25,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 06:07:25,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 06:07:25,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 06:07:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:25,606 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 06:07:25,607 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) [2021-06-17 06:07:25,607 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:25,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 06:07:25,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-06-17 06:07:25,619 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 06:07:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 06:07:25,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2020256046, now seen corresponding path program 1 times [2021-06-17 06:07:25,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 06:07:25,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347370200] [2021-06-17 06:07:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 06:07:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 06:07:25,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 06:07:25,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347370200] [2021-06-17 06:07:25,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347370200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 06:07:25,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632401639] [2021-06-17 06:07:25,634 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 [2021-06-17 06:07:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:25,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 06:07:25,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 06:07:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 06:07:25,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632401639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 06:07:25,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 06:07:25,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-17 06:07:25,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55853490] [2021-06-17 06:07:25,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 06:07:25,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 06:07:25,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 06:07:25,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 06:07:25,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:25,734 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 06:07:25,734 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) [2021-06-17 06:07:25,734 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 06:07:25,734 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 06:07:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 06:07:36,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-17 06:07:36,976 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 06:07:36,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 06:07:36,977 INFO L82 PathProgramCache]: Analyzing trace with hash 153958069, now seen corresponding path program 1 times [2021-06-17 06:07:36,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 06:07:36,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141310529] [2021-06-17 06:07:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 06:07:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 06:07:36,997 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 06:07:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 06:07:37,000 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 06:07:37,002 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 06:07:37,002 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 06:07:37,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-06-17 06:07:37,005 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of7ForFork0 was UNSAFE (3/9) [2021-06-17 06:07:37,005 INFO L255 AbstractCegarLoop]: 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) [2021-06-17 06:07:37,046 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 06:07:37,046 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 06:07:37,046 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 06:07:37,046 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 06:07:37,046 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 06:07:37,046 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 06:07:37,046 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 06:07:37,046 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 06:07:37,156 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 06:07:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 06:07:37,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1527096652, now seen corresponding path program 1 times [2021-06-17 06:07:37,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 06:07:37,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905289376] [2021-06-17 06:07:37,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 06:07:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-17 06:07:37,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 06:07:37,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905289376] [2021-06-17 06:07:37,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905289376] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 06:07:37,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 06:07:37,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 06:07:37,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231629564] [2021-06-17 06:07:37,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 06:07:37,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 06:07:37,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 06:07:37,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 06:07:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:37,170 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 06:07:37,171 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) [2021-06-17 06:07:37,171 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:37,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 06:07:37,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-06-17 06:07:37,199 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 06:07:37,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 06:07:37,199 INFO L82 PathProgramCache]: Analyzing trace with hash 205833053, now seen corresponding path program 1 times [2021-06-17 06:07:37,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 06:07:37,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978843941] [2021-06-17 06:07:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 06:07:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-17 06:07:37,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 06:07:37,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978843941] [2021-06-17 06:07:37,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978843941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 06:07:37,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599272074] [2021-06-17 06:07:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 06:07:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:37,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 06:07:37,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 06:07:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-17 06:07:37,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599272074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 06:07:37,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 06:07:37,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 06:07:37,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276026499] [2021-06-17 06:07:37,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 06:07:37,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 06:07:37,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 06:07:37,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 06:07:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:37,327 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 06:07:37,327 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) [2021-06-17 06:07:37,327 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 06:07:37,327 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:37,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 06:07:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 06:07:37,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-17 06:07:37,570 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 06:07:37,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 06:07:37,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1115420396, now seen corresponding path program 1 times [2021-06-17 06:07:37,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 06:07:37,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440628788] [2021-06-17 06:07:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 06:07:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 06:07:37,574 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 06:07:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 06:07:37,575 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 06:07:37,581 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 06:07:37,581 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 06:07:37,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-06-17 06:07:37,581 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (4/9) [2021-06-17 06:07:37,582 WARN L243 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-17 06:07:37,582 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2021-06-17 06:07:37,597 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 06:07:37,598 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 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 [2021-06-17 06:07:37,603 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 06:07:37,603 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 06:07:37,603 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 06:07:37,603 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 06:07:37,603 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 06:07:37,603 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 06:07:37,603 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 06:07:37,603 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of8ForFork0======== [2021-06-17 06:07:37,719 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 06:07:37,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 06:07:37,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2016643969, now seen corresponding path program 1 times [2021-06-17 06:07:37,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 06:07:37,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557748073] [2021-06-17 06:07:37,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 06:07:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 06:07:37,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 06:07:37,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557748073] [2021-06-17 06:07:37,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557748073] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 06:07:37,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 06:07:37,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 06:07:37,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729953805] [2021-06-17 06:07:37,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 06:07:37,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 06:07:37,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 06:07:37,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 06:07:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:37,730 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 06:07:37,730 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) [2021-06-17 06:07:37,730 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:37,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 06:07:37,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-06-17 06:07:37,743 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 06:07:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 06:07:37,743 INFO L82 PathProgramCache]: Analyzing trace with hash -386533263, now seen corresponding path program 1 times [2021-06-17 06:07:37,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 06:07:37,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432512798] [2021-06-17 06:07:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 06:07:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 06:07:37,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 06:07:37,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432512798] [2021-06-17 06:07:37,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432512798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 06:07:37,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163589439] [2021-06-17 06:07:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 06:07:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:37,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 06:07:37,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 06:07:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 06:07:37,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163589439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 06:07:37,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 06:07:37,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 06:07:37,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772281619] [2021-06-17 06:07:37,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 06:07:37,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 06:07:37,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 06:07:37,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 06:07:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:37,806 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 06:07:37,806 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) [2021-06-17 06:07:37,806 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 06:07:37,806 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 06:07:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 06:07:38,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 06:07:38,033 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 06:07:38,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 06:07:38,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1143228289, now seen corresponding path program 1 times [2021-06-17 06:07:38,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 06:07:38,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275891116] [2021-06-17 06:07:38,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 06:07:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 06:07:38,036 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 06:07:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 06:07:38,037 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 06:07:38,038 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 06:07:38,038 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 06:07:38,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-17 06:07:38,039 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of8ForFork0 was UNSAFE (1/10) [2021-06-17 06:07:38,040 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 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 [2021-06-17 06:07:38,051 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 06:07:38,051 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 06:07:38,051 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 06:07:38,051 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 06:07:38,051 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 06:07:38,051 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 06:07:38,051 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 06:07:38,051 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of8ForFork0======== [2021-06-17 06:07:38,188 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 06:07:38,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 06:07:38,189 INFO L82 PathProgramCache]: Analyzing trace with hash 2001566701, now seen corresponding path program 1 times [2021-06-17 06:07:38,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 06:07:38,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465928979] [2021-06-17 06:07:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 06:07:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 06:07:38,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 06:07:38,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465928979] [2021-06-17 06:07:38,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465928979] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 06:07:38,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 06:07:38,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 06:07:38,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115378566] [2021-06-17 06:07:38,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 06:07:38,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 06:07:38,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 06:07:38,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 06:07:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:38,199 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 06:07:38,199 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) [2021-06-17 06:07:38,199 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:38,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 06:07:38,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-06-17 06:07:38,216 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 06:07:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 06:07:38,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1238372131, now seen corresponding path program 1 times [2021-06-17 06:07:38,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 06:07:38,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525789395] [2021-06-17 06:07:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 06:07:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 06:07:38,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 06:07:38,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525789395] [2021-06-17 06:07:38,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525789395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 06:07:38,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101995081] [2021-06-17 06:07:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 06:07:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:38,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 06:07:38,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 06:07:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 06:07:38,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101995081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 06:07:38,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 06:07:38,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-17 06:07:38,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846279744] [2021-06-17 06:07:38,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 06:07:38,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 06:07:38,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 06:07:38,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 06:07:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:38,284 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 06:07:38,284 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) [2021-06-17 06:07:38,284 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 06:07:38,284 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:38,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 06:07:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 06:07:38,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 06:07:38,519 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 06:07:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 06:07:38,519 INFO L82 PathProgramCache]: Analyzing trace with hash 612382701, now seen corresponding path program 1 times [2021-06-17 06:07:38,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 06:07:38,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897229708] [2021-06-17 06:07:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 06:07:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 06:07:38,522 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 06:07:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 06:07:38,523 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 06:07:38,524 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 06:07:38,524 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 06:07:38,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-06-17 06:07:38,525 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of8ForFork0 was UNSAFE (2/10) [2021-06-17 06:07:38,525 INFO L255 AbstractCegarLoop]: 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) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 06:07:38,529 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 06:07:38,529 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 06:07:38,529 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 06:07:38,529 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 06:07:38,529 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 06:07:38,529 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 06:07:38,529 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 06:07:38,529 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of8ForFork0======== [2021-06-17 06:07:38,639 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 06:07:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 06:07:38,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1798088598, now seen corresponding path program 1 times [2021-06-17 06:07:38,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 06:07:38,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287684826] [2021-06-17 06:07:38,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 06:07:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 06:07:38,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 06:07:38,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287684826] [2021-06-17 06:07:38,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287684826] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 06:07:38,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 06:07:38,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 06:07:38,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313911098] [2021-06-17 06:07:38,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 06:07:38,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 06:07:38,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 06:07:38,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 06:07:38,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:38,649 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 06:07:38,649 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) [2021-06-17 06:07:38,649 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 06:07:38,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-06-17 06:07:38,656 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 06:07:38,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 06:07:38,657 INFO L82 PathProgramCache]: Analyzing trace with hash 747310214, now seen corresponding path program 1 times [2021-06-17 06:07:38,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 06:07:38,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069635427] [2021-06-17 06:07:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 06:07:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 06:07:38,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 06:07:38,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069635427] [2021-06-17 06:07:38,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069635427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 06:07:38,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151250229] [2021-06-17 06:07:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 06:07:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 06:07:38,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 06:07:38,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 06:07:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-17 06:07:38,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151250229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 06:07:38,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 06:07:38,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-17 06:07:38,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63845538] [2021-06-17 06:07:38,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 06:07:38,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 06:07:38,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 06:07:38,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 06:07:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 06:07:38,724 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 06:07:38,724 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) [2021-06-17 06:07:38,724 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 06:07:38,724 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.