/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-Persistent-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98196c323137eee61a7c1131837b356358d783d4-98196c3 [2021-06-17 02:41:21,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-17 02:41:21,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-17 02:41:21,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-17 02:41:21,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-Persistent-NoLbe.epf [2021-06-17 02:41:21,493 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-17 02:41:21,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-17 02:41:21,494 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-17 02:41:21,494 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-17 02:41:21,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-17 02:41:21,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-17 02:41:21,495 INFO L138 SettingsManager]: * Use SBE=true [2021-06-17 02:41:21,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-17 02:41:21,495 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-17 02:41:21,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-17 02:41:21,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-17 02:41:21,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-17 02:41:21,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-17 02:41:21,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-17 02:41:21,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-17 02:41:21,496 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-17 02:41:21,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-17 02:41:21,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-17 02:41:21,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-17 02:41:21,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-17 02:41:21,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-17 02:41:21,497 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-17 02:41:21,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-17 02:41:21,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-17 02:41:21,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-17 02:41:21,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-17 02:41:21,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-17 02:41:21,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-17 02:41:21,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-17 02:41:21,497 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-17 02:41:21,497 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-06-17 02:41:21,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-17 02:41:21,498 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SETS [2021-06-17 02:41:21,498 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-17 02:41:21,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-17 02:41:21,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-17 02:41:21,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-17 02:41:21,763 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-17 02:41:21,764 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-17 02:41:21,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl [2021-06-17 02:41:21,765 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl' [2021-06-17 02:41:21,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-17 02:41:21,783 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-17 02:41:21,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-17 02:41:21,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-17 02:41:21,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-17 02:41:21,792 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 02:41:21" (1/1) ... [2021-06-17 02:41:21,796 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 02:41:21" (1/1) ... [2021-06-17 02:41:21,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-17 02:41:21,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-17 02:41:21,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-17 02:41:21,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-17 02:41:21,810 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 02:41:21" (1/1) ... [2021-06-17 02:41:21,810 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 02:41:21" (1/1) ... [2021-06-17 02:41:21,811 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 02:41:21" (1/1) ... [2021-06-17 02:41:21,811 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 02:41:21" (1/1) ... [2021-06-17 02:41:21,812 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 02:41:21" (1/1) ... [2021-06-17 02:41:21,818 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 02:41:21" (1/1) ... [2021-06-17 02:41:21,818 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 02:41:21" (1/1) ... [2021-06-17 02:41:21,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-17 02:41:21,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-17 02:41:21,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-17 02:41:21,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-17 02:41:21,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 02:41:21" (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 02:41:21,917 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-06-17 02:41:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-06-17 02:41:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-06-17 02:41:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-17 02:41:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-17 02:41:21,919 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 02:41:22,037 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-17 02:41:22,037 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-17 02:41:22,039 INFO L202 PluginConnector]: Adding new model ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.06 02:41:22 BoogieIcfgContainer [2021-06-17 02:41:22,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-17 02:41:22,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-17 02:41:22,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-17 02:41:22,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-17 02:41:22,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 17.06 02:41:21" (1/2) ... [2021-06-17 02:41:22,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f04a600 and model type ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.06 02:41:22, skipping insertion in model container [2021-06-17 02:41:22,047 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 02:41:22" (2/2) ... [2021-06-17 02:41:22,048 INFO L111 eAbstractionObserver]: Analyzing ICFG ForkInLoop02-Incrementer.bpl [2021-06-17 02:41:22,054 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-17 02:41:22,055 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-17 02:41:22,055 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-17 02:41:22,056 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-17 02:41:22,098 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 02:41:22,120 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 02:41:22,172 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:22,172 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:22,173 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:22,173 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:22,173 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:22,173 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:22,173 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:22,174 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of1ForFork0======== [2021-06-17 02:41:22,221 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:22,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:22,226 INFO L82 PathProgramCache]: Analyzing trace with hash 42091544, now seen corresponding path program 1 times [2021-06-17 02:41:22,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:22,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103037440] [2021-06-17 02:41:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-17 02:41:22,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:22,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103037440] [2021-06-17 02:41:22,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103037440] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:22,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:22,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 02:41:22,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8513387] [2021-06-17 02:41:22,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:41:22,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:22,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:41:22,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:41:22,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:22,387 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:22,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:22,393 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:22,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:22,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-17 02:41:22,425 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of1ForFork0 was SAFE (1/3) [2021-06-17 02:41:22,426 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:22,483 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:22,484 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:22,484 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:22,484 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:22,484 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:22,484 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:22,484 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:22,484 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-17 02:41:22,492 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (2/3) [2021-06-17 02:41:22,493 INFO L255 AbstractCegarLoop]: 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 02:41:22,553 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:22,553 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:22,553 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:22,553 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:22,553 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:22,553 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:22,553 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:22,553 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-17 02:41:22,557 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 02:41:22,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:22,558 INFO L82 PathProgramCache]: Analyzing trace with hash 42091268, now seen corresponding path program 1 times [2021-06-17 02:41:22,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:22,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019963391] [2021-06-17 02:41:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:22,577 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:22,586 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:22,612 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:22,612 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:22,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-17 02:41:22,618 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (3/3) [2021-06-17 02:41:22,619 WARN L243 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-17 02:41:22,619 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-17 02:41:22,638 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 02:41:22,639 INFO L255 AbstractCegarLoop]: 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 02:41:22,644 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:22,644 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:22,644 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:22,644 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:22,644 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:22,644 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:22,644 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:22,644 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-17 02:41:22,767 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (1/4) [2021-06-17 02:41:22,768 INFO L255 AbstractCegarLoop]: 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 02:41:22,774 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:22,774 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:22,774 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:22,774 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:22,774 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:22,774 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:22,774 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:22,774 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-17 02:41:22,830 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 02:41:22,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:22,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1624858962, now seen corresponding path program 1 times [2021-06-17 02:41:22,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:22,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164116249] [2021-06-17 02:41:22,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:22,835 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:22,851 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:22,852 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:22,852 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:22,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-17 02:41:22,853 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (2/4) [2021-06-17 02:41:22,853 WARN L243 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-17 02:41:22,854 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-17 02:41:22,897 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 02:41:22,897 INFO L255 AbstractCegarLoop]: 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) [2021-06-17 02:41:22,921 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:22,921 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:22,921 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:22,921 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:22,921 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:22,921 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:22,921 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:22,921 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of3ForFork0======== Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:23,029 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:23,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1006356384, now seen corresponding path program 1 times [2021-06-17 02:41:23,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:23,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640590966] [2021-06-17 02:41:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 02:41:23,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:23,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640590966] [2021-06-17 02:41:23,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640590966] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:23,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:23,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 02:41:23,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214305869] [2021-06-17 02:41:23,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:41:23,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:23,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:41:23,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:41:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:23,065 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:23,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:23,066 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:23,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-17 02:41:23,123 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:23,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:23,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1132277107, now seen corresponding path program 1 times [2021-06-17 02:41:23,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:23,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443546826] [2021-06-17 02:41:23,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 02:41:23,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:23,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443546826] [2021-06-17 02:41:23,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443546826] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:23,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:23,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:41:23,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131167213] [2021-06-17 02:41:23,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:41:23,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:23,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:41:23,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:41:23,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:23,168 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:23,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:23,168 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:23,168 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:41:23,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-17 02:41:23,314 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:23,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:23,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1891916684, now seen corresponding path program 1 times [2021-06-17 02:41:23,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:23,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949863215] [2021-06-17 02:41:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:23,321 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:23,326 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:23,327 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:23,327 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:23,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-17 02:41:23,329 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of3ForFork0 was UNSAFE (1/5) [2021-06-17 02:41:23,330 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:23,350 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:23,350 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:23,350 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:23,351 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:23,351 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:23,351 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:23,351 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:23,351 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of3ForFork0======== [2021-06-17 02:41:23,465 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:23,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1816523033, now seen corresponding path program 1 times [2021-06-17 02:41:23,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:23,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427959416] [2021-06-17 02:41:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 02:41:23,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:23,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427959416] [2021-06-17 02:41:23,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427959416] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:23,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:23,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:41:23,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796732608] [2021-06-17 02:41:23,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:41:23,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:23,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:41:23,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:41:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:23,500 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:23,500 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 02:41:23,500 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:23,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-17 02:41:23,529 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:23,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:23,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1816523994, now seen corresponding path program 1 times [2021-06-17 02:41:23,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:23,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251343450] [2021-06-17 02:41:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 02:41:23,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:23,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251343450] [2021-06-17 02:41:23,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251343450] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:23,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:23,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:41:23,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431262546] [2021-06-17 02:41:23,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:41:23,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:23,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:41:23,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:41:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:23,576 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:23,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:23,576 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:23,576 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:23,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:41:23,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-17 02:41:23,608 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:23,608 INFO L82 PathProgramCache]: Analyzing trace with hash 477669121, now seen corresponding path program 1 times [2021-06-17 02:41:23,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:23,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354584737] [2021-06-17 02:41:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:23,614 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:23,617 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:23,618 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:23,619 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:23,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-17 02:41:23,620 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of3ForFork0 was UNSAFE (2/5) [2021-06-17 02:41:23,620 INFO L255 AbstractCegarLoop]: 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 02:41:23,678 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:23,678 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:23,678 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:23,678 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:23,678 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:23,678 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:23,678 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:23,679 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-17 02:41:23,797 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (3/5) [2021-06-17 02:41:23,798 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:23,838 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:23,839 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:23,839 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:23,839 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:23,839 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:23,839 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:23,839 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:23,839 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of3ForFork0======== [2021-06-17 02:41:23,919 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:23,919 INFO L82 PathProgramCache]: Analyzing trace with hash -459303287, now seen corresponding path program 1 times [2021-06-17 02:41:23,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:23,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84575701] [2021-06-17 02:41:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:23,931 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 02:41:23,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:23,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84575701] [2021-06-17 02:41:23,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84575701] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:23,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:23,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 02:41:23,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486500322] [2021-06-17 02:41:23,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:41:23,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:23,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:41:23,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:41:23,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:23,933 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:23,933 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 02:41:23,933 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:23,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:23,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-17 02:41:23,975 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:23,976 INFO L82 PathProgramCache]: Analyzing trace with hash 981561315, now seen corresponding path program 1 times [2021-06-17 02:41:23,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:23,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197433836] [2021-06-17 02:41:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:23,997 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 02:41:23,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:23,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197433836] [2021-06-17 02:41:23,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197433836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 02:41:23,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275024776] [2021-06-17 02:41:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 02:41:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:24,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 02:41:24,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 02:41:24,130 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 02:41:24,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275024776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 02:41:24,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 02:41:24,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-17 02:41:24,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876087542] [2021-06-17 02:41:24,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:41:24,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:24,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:41:24,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:41:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:24,132 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:24,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:24,133 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:24,133 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:41:24,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 02:41:24,376 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:24,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:24,377 INFO L82 PathProgramCache]: Analyzing trace with hash -233311345, now seen corresponding path program 1 times [2021-06-17 02:41:24,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:24,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557585942] [2021-06-17 02:41:24,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:24,381 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:24,385 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:24,386 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:24,386 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:24,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-17 02:41:24,387 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of3ForFork0 was UNSAFE (4/5) [2021-06-17 02:41:24,387 INFO L255 AbstractCegarLoop]: 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 02:41:24,395 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:24,395 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:24,395 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:24,395 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:24,395 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:24,396 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:24,396 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:24,396 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-17 02:41:24,498 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 02:41:24,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:24,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1006373414, now seen corresponding path program 1 times [2021-06-17 02:41:24,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:24,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818136618] [2021-06-17 02:41:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:24,502 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:24,503 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:24,504 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:24,505 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:24,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-17 02:41:24,505 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (5/5) [2021-06-17 02:41:24,505 WARN L243 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-17 02:41:24,505 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-17 02:41:24,511 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 02:41:24,511 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:24,516 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:24,516 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:24,516 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:24,516 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:24,516 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:24,516 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:24,516 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:24,516 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-17 02:41:24,800 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (1/6) [2021-06-17 02:41:24,800 INFO L255 AbstractCegarLoop]: 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 02:41:24,810 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:24,810 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:24,810 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:24,810 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:24,810 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:24,810 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:24,810 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:24,810 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-17 02:41:24,960 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 02:41:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1379665844, now seen corresponding path program 1 times [2021-06-17 02:41:24,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:24,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888961957] [2021-06-17 02:41:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:24,966 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:24,968 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:24,969 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:24,969 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:24,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-17 02:41:24,969 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (2/6) [2021-06-17 02:41:24,970 WARN L243 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-17 02:41:24,970 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-06-17 02:41:24,976 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 02:41:24,976 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:24,981 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:24,981 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:24,981 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:24,981 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:24,981 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:24,981 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:24,981 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:24,981 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of5ForFork0======== [2021-06-17 02:41:25,041 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:25,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:25,042 INFO L82 PathProgramCache]: Analyzing trace with hash -836435353, now seen corresponding path program 1 times [2021-06-17 02:41:25,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:25,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136820448] [2021-06-17 02:41:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 02:41:25,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:25,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136820448] [2021-06-17 02:41:25,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136820448] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:25,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:25,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 02:41:25,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468101785] [2021-06-17 02:41:25,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:41:25,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:25,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:41:25,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:41:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:25,069 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:25,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:25,069 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:25,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-17 02:41:25,089 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:25,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:25,090 INFO L82 PathProgramCache]: Analyzing trace with hash -159691961, now seen corresponding path program 1 times [2021-06-17 02:41:25,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:25,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160749042] [2021-06-17 02:41:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 02:41:25,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:25,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160749042] [2021-06-17 02:41:25,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160749042] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:25,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:25,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:41:25,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278502809] [2021-06-17 02:41:25,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:41:25,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:25,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:41:25,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:41:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:25,130 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:25,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:25,131 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:25,131 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:41:25,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-17 02:41:25,429 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:25,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1860877683, now seen corresponding path program 1 times [2021-06-17 02:41:25,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:25,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320376649] [2021-06-17 02:41:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:25,447 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:25,450 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:25,451 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:25,451 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:25,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-17 02:41:25,452 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of5ForFork0 was UNSAFE (1/7) [2021-06-17 02:41:25,452 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-17 02:41:25,473 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:25,473 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:25,473 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:25,473 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:25,473 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:25,473 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:25,473 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:25,473 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of5ForFork0======== Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:25,544 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:25,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:25,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1551730264, now seen corresponding path program 1 times [2021-06-17 02:41:25,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:25,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680140729] [2021-06-17 02:41:25,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:25,565 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 02:41:25,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:25,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680140729] [2021-06-17 02:41:25,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680140729] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:25,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:25,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 02:41:25,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340512899] [2021-06-17 02:41:25,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:41:25,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:25,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:41:25,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:41:25,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:25,566 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:25,566 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 02:41:25,566 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:25,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:25,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-17 02:41:25,733 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:25,733 INFO L82 PathProgramCache]: Analyzing trace with hash -646569277, now seen corresponding path program 1 times [2021-06-17 02:41:25,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:25,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060993976] [2021-06-17 02:41:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:25,860 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 02:41:25,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:25,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060993976] [2021-06-17 02:41:25,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060993976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 02:41:25,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417610583] [2021-06-17 02:41:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 02:41:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:25,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 02:41:25,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 02:41:25,910 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 02:41:25,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417610583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 02:41:25,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 02:41:25,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-17 02:41:25,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122275219] [2021-06-17 02:41:25,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:41:25,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:25,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:41:25,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:41:25,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:25,911 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:25,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:25,912 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:25,912 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:25,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:25,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:41:26,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-17 02:41:26,161 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:26,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:26,161 INFO L82 PathProgramCache]: Analyzing trace with hash -575590493, now seen corresponding path program 1 times [2021-06-17 02:41:26,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:26,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573128787] [2021-06-17 02:41:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:26,164 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:26,166 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:26,167 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:26,167 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:26,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-17 02:41:26,168 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of5ForFork0 was UNSAFE (2/7) [2021-06-17 02:41:26,168 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-17 02:41:26,185 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:26,185 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:26,185 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:26,185 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:26,185 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:26,185 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:26,185 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:26,185 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of5ForFork0======== Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:26,292 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:26,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:26,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1299891497, now seen corresponding path program 1 times [2021-06-17 02:41:26,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:26,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596662626] [2021-06-17 02:41:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 02:41:26,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:26,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596662626] [2021-06-17 02:41:26,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596662626] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:26,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:26,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:41:26,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564248170] [2021-06-17 02:41:26,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:41:26,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:26,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:41:26,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:41:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:26,370 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:26,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:26,370 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:26,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:26,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-17 02:41:26,384 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:26,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1300815018, now seen corresponding path program 1 times [2021-06-17 02:41:26,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:26,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584726312] [2021-06-17 02:41:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 02:41:26,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:26,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584726312] [2021-06-17 02:41:26,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584726312] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:26,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:26,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-17 02:41:26,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301997043] [2021-06-17 02:41:26,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:41:26,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:26,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:41:26,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:41:26,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:26,416 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:26,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:26,417 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:26,417 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:41:26,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-17 02:41:26,436 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:26,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:26,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1300815979, now seen corresponding path program 1 times [2021-06-17 02:41:26,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:26,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197013087] [2021-06-17 02:41:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:26,445 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:26,448 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:26,452 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:26,452 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:26,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-17 02:41:26,453 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of5ForFork0 was UNSAFE (3/7) [2021-06-17 02:41:26,453 INFO L255 AbstractCegarLoop]: 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 02:41:26,458 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:26,458 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:26,458 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:26,458 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:26,458 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:26,458 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:26,458 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:26,458 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of5ForFork0======== [2021-06-17 02:41:26,605 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:26,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:26,607 INFO L82 PathProgramCache]: Analyzing trace with hash 586675309, now seen corresponding path program 1 times [2021-06-17 02:41:26,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:26,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907961961] [2021-06-17 02:41:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-17 02:41:26,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:26,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907961961] [2021-06-17 02:41:26,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907961961] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:26,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:26,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:41:26,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250727951] [2021-06-17 02:41:26,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:41:26,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:26,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:41:26,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:41:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:26,632 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:26,632 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 02:41:26,632 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:26,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:26,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-17 02:41:26,651 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:26,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1474178990, now seen corresponding path program 1 times [2021-06-17 02:41:26,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:26,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656830083] [2021-06-17 02:41:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-17 02:41:26,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:26,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656830083] [2021-06-17 02:41:26,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656830083] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:26,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:26,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-17 02:41:26,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828369145] [2021-06-17 02:41:26,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:41:26,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:26,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:41:26,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:41:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:26,672 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:26,673 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 02:41:26,673 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:26,673 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:41:26,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-17 02:41:26,700 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1475102511, now seen corresponding path program 1 times [2021-06-17 02:41:26,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:26,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586475227] [2021-06-17 02:41:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:26,703 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:26,706 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:26,707 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:26,707 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:26,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-17 02:41:26,708 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of5ForFork0 was UNSAFE (4/7) [2021-06-17 02:41:26,708 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-17 02:41:26,726 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:26,727 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:26,727 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:26,727 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:26,727 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:26,727 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:26,727 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:26,727 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:27,636 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (5/7) [2021-06-17 02:41:27,637 INFO L255 AbstractCegarLoop]: 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 02:41:27,641 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:27,641 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:27,641 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:27,641 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:27,641 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:27,641 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:27,641 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:27,641 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-17 02:41:28,141 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 02:41:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:28,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1493509120, now seen corresponding path program 1 times [2021-06-17 02:41:28,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:28,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97524607] [2021-06-17 02:41:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:28,144 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:28,146 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:28,147 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:28,147 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:28,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-17 02:41:28,147 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (6/7) [2021-06-17 02:41:28,147 WARN L243 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-17 02:41:28,147 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-06-17 02:41:28,154 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 02:41:28,154 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:28,194 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:28,194 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:28,194 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:28,194 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:28,194 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:28,194 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:28,194 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:28,194 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of6ForFork0======== [2021-06-17 02:41:28,763 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:28,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:28,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1242147672, now seen corresponding path program 1 times [2021-06-17 02:41:28,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:28,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820260774] [2021-06-17 02:41:28,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-17 02:41:28,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:28,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820260774] [2021-06-17 02:41:28,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820260774] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:28,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:28,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 02:41:28,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154896555] [2021-06-17 02:41:28,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:41:28,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:28,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:41:28,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:41:28,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:28,785 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:28,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:28,785 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:29,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-17 02:41:29,204 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:29,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:29,204 INFO L82 PathProgramCache]: Analyzing trace with hash 148128073, now seen corresponding path program 1 times [2021-06-17 02:41:29,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:29,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116484257] [2021-06-17 02:41:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-17 02:41:29,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:29,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116484257] [2021-06-17 02:41:29,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116484257] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:29,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:29,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:41:29,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320440586] [2021-06-17 02:41:29,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:41:29,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:29,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:41:29,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:41:29,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:29,237 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:29,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:29,237 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:29,237 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:29,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:41:29,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-17 02:41:29,273 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:29,273 INFO L82 PathProgramCache]: Analyzing trace with hash 617167143, now seen corresponding path program 1 times [2021-06-17 02:41:29,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:29,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479416641] [2021-06-17 02:41:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:29,276 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:29,278 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:29,279 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:29,279 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:29,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-17 02:41:29,280 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of6ForFork0 was UNSAFE (1/8) [2021-06-17 02:41:29,280 INFO L255 AbstractCegarLoop]: 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) [2021-06-17 02:41:29,318 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:29,318 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:29,318 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:29,318 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:29,318 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:29,318 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:29,318 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:29,318 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of6ForFork0======== Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:29,491 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:29,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:29,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1923109439, now seen corresponding path program 1 times [2021-06-17 02:41:29,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:29,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57530840] [2021-06-17 02:41:29,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-17 02:41:29,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:29,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57530840] [2021-06-17 02:41:29,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57530840] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:29,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:29,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 02:41:29,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704636506] [2021-06-17 02:41:29,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:41:29,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:29,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:41:29,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:41:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:29,504 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:29,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:29,505 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:29,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-17 02:41:29,578 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:29,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:29,578 INFO L82 PathProgramCache]: Analyzing trace with hash 513149780, now seen corresponding path program 1 times [2021-06-17 02:41:29,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:29,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116788137] [2021-06-17 02:41:29,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-17 02:41:29,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:29,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116788137] [2021-06-17 02:41:29,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116788137] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:29,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:29,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:41:29,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528792985] [2021-06-17 02:41:29,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:41:29,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:29,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:41:29,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:41:29,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:29,592 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:29,593 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 02:41:29,593 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:29,593 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:41:29,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-17 02:41:29,631 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:29,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:29,631 INFO L82 PathProgramCache]: Analyzing trace with hash -784290574, now seen corresponding path program 1 times [2021-06-17 02:41:29,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:29,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840389089] [2021-06-17 02:41:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:29,640 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:29,643 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:29,645 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:29,645 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:29,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-17 02:41:29,646 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of6ForFork0 was UNSAFE (2/8) [2021-06-17 02:41:29,646 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:29,650 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:29,650 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:29,650 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:29,650 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:29,650 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:29,650 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:29,650 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:29,650 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of6ForFork0======== [2021-06-17 02:41:29,711 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:29,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:29,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1806959342, now seen corresponding path program 1 times [2021-06-17 02:41:29,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:29,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462657429] [2021-06-17 02:41:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 02:41:29,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:29,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462657429] [2021-06-17 02:41:29,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462657429] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:29,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:29,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 02:41:29,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765391981] [2021-06-17 02:41:29,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:41:29,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:29,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:41:29,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:41:29,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:29,722 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:29,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:29,722 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:29,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-17 02:41:29,736 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:29,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:29,736 INFO L82 PathProgramCache]: Analyzing trace with hash -181164505, now seen corresponding path program 1 times [2021-06-17 02:41:29,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:29,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014528302] [2021-06-17 02:41:29,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 02:41:29,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:29,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014528302] [2021-06-17 02:41:29,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014528302] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:29,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:29,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:41:29,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448332556] [2021-06-17 02:41:29,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:41:29,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:29,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:41:29,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:41:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:29,768 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:29,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:29,768 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:29,769 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:41:31,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-17 02:41:31,011 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:31,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1405418071, now seen corresponding path program 1 times [2021-06-17 02:41:31,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:31,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551045724] [2021-06-17 02:41:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:31,031 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:31,033 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:31,035 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:31,035 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:31,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-17 02:41:31,038 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of6ForFork0 was UNSAFE (3/8) [2021-06-17 02:41:31,038 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-17 02:41:31,074 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:31,074 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:31,074 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:31,074 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:31,074 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:31,074 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:31,074 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:31,074 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of6ForFork0======== Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:31,133 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:31,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:31,133 INFO L82 PathProgramCache]: Analyzing trace with hash 485242799, now seen corresponding path program 1 times [2021-06-17 02:41:31,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:31,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204586613] [2021-06-17 02:41:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:31,141 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 02:41:31,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:31,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204586613] [2021-06-17 02:41:31,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204586613] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:31,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:31,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 02:41:31,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581081534] [2021-06-17 02:41:31,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:41:31,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:31,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:41:31,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:41:31,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:31,142 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:31,142 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 02:41:31,142 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:32,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-17 02:41:32,283 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:32,283 INFO L82 PathProgramCache]: Analyzing trace with hash -549838821, now seen corresponding path program 1 times [2021-06-17 02:41:32,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:32,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303381009] [2021-06-17 02:41:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:32,306 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 02:41:32,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:32,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303381009] [2021-06-17 02:41:32,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303381009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 02:41:32,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654590048] [2021-06-17 02:41:32,307 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 02:41:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:32,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-17 02:41:32,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-17 02:41:32,364 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 02:41:32,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654590048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-17 02:41:32,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-17 02:41:32,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-17 02:41:32,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366468619] [2021-06-17 02:41:32,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:41:32,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:32,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:41:32,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:41:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:32,365 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:32,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:32,365 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:32,365 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:32,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:32,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:41:32,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-17 02:41:32,591 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:32,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:32,591 INFO L82 PathProgramCache]: Analyzing trace with hash -603648953, now seen corresponding path program 1 times [2021-06-17 02:41:32,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:32,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424290493] [2021-06-17 02:41:32,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:32,612 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:32,614 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:32,615 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:32,615 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:32,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-17 02:41:32,617 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of6ForFork0 was UNSAFE (4/8) [2021-06-17 02:41:32,617 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:32,659 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:32,659 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:32,659 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:32,659 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:32,659 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:32,659 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:32,659 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:32,659 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-17 02:41:39,610 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (5/8) [2021-06-17 02:41:39,611 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 02:41:39,615 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:39,615 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:39,615 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:39,615 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:39,615 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:39,615 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:39,615 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:39,615 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of6ForFork0======== [2021-06-17 02:41:39,682 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:39,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:39,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1097914040, now seen corresponding path program 1 times [2021-06-17 02:41:39,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:39,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313090003] [2021-06-17 02:41:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 02:41:39,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:39,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313090003] [2021-06-17 02:41:39,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313090003] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:39,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:39,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:41:39,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747332793] [2021-06-17 02:41:39,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:41:39,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:41:39,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:41:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:39,700 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:39,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:39,700 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:39,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:39,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-17 02:41:39,714 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:39,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:39,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1098837561, now seen corresponding path program 1 times [2021-06-17 02:41:39,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:39,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281877604] [2021-06-17 02:41:39,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 02:41:39,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:39,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281877604] [2021-06-17 02:41:39,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281877604] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:39,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:39,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-17 02:41:39,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023912781] [2021-06-17 02:41:39,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:41:39,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:39,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:41:39,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:41:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:39,729 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:39,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:39,730 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:39,730 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:41:39,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-17 02:41:39,744 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:39,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1098838522, now seen corresponding path program 1 times [2021-06-17 02:41:39,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:39,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956909301] [2021-06-17 02:41:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:39,747 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:39,748 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:39,749 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:39,749 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:39,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-17 02:41:39,750 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of6ForFork0 was UNSAFE (6/8) [2021-06-17 02:41:39,750 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:41:39,768 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:39,768 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:39,768 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:39,768 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:39,768 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:39,769 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:39,769 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:39,769 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-17 02:41:42,915 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 02:41:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:42,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1923078110, now seen corresponding path program 1 times [2021-06-17 02:41:42,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:42,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833998997] [2021-06-17 02:41:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:42,929 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:42,938 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:42,947 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:42,947 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:42,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-17 02:41:42,951 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (7/8) [2021-06-17 02:41:42,951 WARN L243 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-17 02:41:42,951 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-06-17 02:41:42,991 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 02:41:42,991 INFO L255 AbstractCegarLoop]: 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 02:41:42,995 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:42,995 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:42,995 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:42,995 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:42,995 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:42,995 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:42,995 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:42,996 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of7ForFork0======== [2021-06-17 02:41:43,227 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:43,228 INFO L82 PathProgramCache]: Analyzing trace with hash -324790659, now seen corresponding path program 1 times [2021-06-17 02:41:43,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:43,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824346108] [2021-06-17 02:41:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-17 02:41:43,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:43,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824346108] [2021-06-17 02:41:43,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824346108] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:43,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:43,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 02:41:43,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941449326] [2021-06-17 02:41:43,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:41:43,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:43,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:41:43,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:41:43,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:43,250 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:43,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:41:43,250 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:43,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-17 02:41:43,411 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:43,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:43,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1478575556, now seen corresponding path program 1 times [2021-06-17 02:41:43,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:43,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221810015] [2021-06-17 02:41:43,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:41:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-17 02:41:43,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:41:43,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221810015] [2021-06-17 02:41:43,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221810015] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:41:43,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:41:43,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:41:43,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198610224] [2021-06-17 02:41:43,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:41:43,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:41:43,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:41:43,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:41:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:43,437 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:41:43,437 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 02:41:43,437 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:43,437 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:41:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:41:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:41:43,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-17 02:41:43,463 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:41:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:41:43,464 INFO L82 PathProgramCache]: Analyzing trace with hash 723076946, now seen corresponding path program 1 times [2021-06-17 02:41:43,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:41:43,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326175621] [2021-06-17 02:41:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:41:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:43,467 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:41:43,468 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:41:43,470 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:41:43,470 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:41:43,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-17 02:41:43,473 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of7ForFork0 was UNSAFE (1/9) [2021-06-17 02:41:43,473 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-17 02:41:43,497 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:41:43,497 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:41:43,497 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:41:43,497 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:41:43,497 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:41:43,497 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:41:43,497 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:41:43,497 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:43:29,684 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (2/9) [2021-06-17 02:43:29,695 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 02:43:29,700 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:43:29,700 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:43:29,700 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:43:29,700 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:43:29,700 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:43:29,700 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:43:29,700 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:43:29,700 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of7ForFork0======== [2021-06-17 02:43:29,829 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:43:29,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:43:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1484731330, now seen corresponding path program 1 times [2021-06-17 02:43:29,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:43:29,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442034266] [2021-06-17 02:43:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:43:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:43:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 02:43:29,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:43:29,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442034266] [2021-06-17 02:43:29,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442034266] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:43:29,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:43:29,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 02:43:29,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841787254] [2021-06-17 02:43:29,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:43:29,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:43:29,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:43:29,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:43:29,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:43:29,854 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:43:29,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:43:29,854 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:43:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:43:29,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-17 02:43:29,898 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:43:29,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:43:29,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1217968493, now seen corresponding path program 1 times [2021-06-17 02:43:29,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:43:29,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001025813] [2021-06-17 02:43:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:43:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:43:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 02:43:29,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:43:29,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001025813] [2021-06-17 02:43:29,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001025813] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:43:29,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:43:29,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:43:29,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504694316] [2021-06-17 02:43:29,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:43:29,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:43:29,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:43:29,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:43:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:43:29,912 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:43:29,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:43:29,912 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:43:29,912 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:43:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:43:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:43:39,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-06-17 02:43:39,648 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:43:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:43:39,648 INFO L82 PathProgramCache]: Analyzing trace with hash -108466531, now seen corresponding path program 1 times [2021-06-17 02:43:39,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:43:39,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142457481] [2021-06-17 02:43:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:43:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:43:39,650 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:43:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:43:39,651 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:43:39,652 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:43:39,652 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:43:39,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-06-17 02:43:39,653 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of7ForFork0 was UNSAFE (3/9) [2021-06-17 02:43:39,653 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:43:39,657 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:43:39,657 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:43:39,658 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:43:39,658 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:43:39,658 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:43:39,658 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:43:39,658 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:43:39,658 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-17 02:44:14,398 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-17 02:44:14,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:44:14,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1442729874, now seen corresponding path program 1 times [2021-06-17 02:44:14,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:44:14,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263486611] [2021-06-17 02:44:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:44:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:44:14,417 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:44:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:44:14,418 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:44:14,419 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:44:14,419 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:44:14,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-06-17 02:44:14,419 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (4/9) [2021-06-17 02:44:14,420 WARN L243 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-17 02:44:14,420 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2021-06-17 02:44:14,428 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-17 02:44:14,428 INFO L255 AbstractCegarLoop]: 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 02:44:14,433 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:44:14,433 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:44:14,433 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:44:14,433 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:44:14,433 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:44:14,433 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:44:14,433 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:44:14,433 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of8ForFork0======== [2021-06-17 02:44:14,590 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:44:14,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:44:14,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1741158915, now seen corresponding path program 1 times [2021-06-17 02:44:14,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:44:14,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605925793] [2021-06-17 02:44:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:44:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:44:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 02:44:14,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:44:14,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605925793] [2021-06-17 02:44:14,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605925793] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:44:14,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:44:14,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 02:44:14,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102038112] [2021-06-17 02:44:14,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:44:14,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:44:14,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:44:14,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:44:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:44:14,606 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:44:14,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:44:14,606 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:44:14,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:44:14,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-06-17 02:44:14,622 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:44:14,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:44:14,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1858648033, now seen corresponding path program 1 times [2021-06-17 02:44:14,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:44:14,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593185739] [2021-06-17 02:44:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:44:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:44:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-17 02:44:14,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:44:14,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593185739] [2021-06-17 02:44:14,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593185739] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:44:14,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:44:14,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:44:14,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054085923] [2021-06-17 02:44:14,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:44:14,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:44:14,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:44:14,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:44:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:44:14,639 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:44:14,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:44:14,639 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:44:14,639 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:44:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:44:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:44:14,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-06-17 02:44:14,656 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:44:14,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:44:14,656 INFO L82 PathProgramCache]: Analyzing trace with hash 545652365, now seen corresponding path program 1 times [2021-06-17 02:44:14,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:44:14,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12444820] [2021-06-17 02:44:14,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:44:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:44:14,660 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:44:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:44:14,661 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:44:14,663 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:44:14,663 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:44:14,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-06-17 02:44:14,664 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of8ForFork0 was UNSAFE (1/10) [2021-06-17 02:44:14,665 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-17 02:44:14,722 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:44:14,722 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:44:14,722 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:44:14,722 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:44:14,722 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:44:14,722 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:44:14,722 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:44:14,722 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of8ForFork0======== Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:44:14,854 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:44:14,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:44:14,854 INFO L82 PathProgramCache]: Analyzing trace with hash -279885295, now seen corresponding path program 1 times [2021-06-17 02:44:14,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:44:14,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160158083] [2021-06-17 02:44:14,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:44:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:44:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-17 02:44:14,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:44:14,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160158083] [2021-06-17 02:44:14,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160158083] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:44:14,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:44:14,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:44:14,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866976837] [2021-06-17 02:44:14,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:44:14,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:44:14,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:44:14,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:44:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:44:14,870 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:44:14,870 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 02:44:14,870 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:44:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:44:14,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-06-17 02:44:14,882 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:44:14,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:44:14,883 INFO L82 PathProgramCache]: Analyzing trace with hash -279884334, now seen corresponding path program 1 times [2021-06-17 02:44:14,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:44:14,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179815420] [2021-06-17 02:44:14,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:44:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:44:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-17 02:44:14,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:44:14,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179815420] [2021-06-17 02:44:14,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179815420] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:44:14,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:44:14,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:44:14,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474054444] [2021-06-17 02:44:14,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:44:14,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:44:14,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:44:14,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:44:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:44:14,901 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:44:14,901 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 02:44:14,901 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:44:14,901 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:44:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:44:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:44:14,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-06-17 02:44:14,936 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:44:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:44:14,936 INFO L82 PathProgramCache]: Analyzing trace with hash -86479432, now seen corresponding path program 1 times [2021-06-17 02:44:14,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:44:14,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9754316] [2021-06-17 02:44:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:44:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:44:14,939 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:44:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:44:14,939 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:44:14,940 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:44:14,940 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:44:14,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-06-17 02:44:14,941 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of8ForFork0 was UNSAFE (2/10) [2021-06-17 02:44:14,941 INFO L255 AbstractCegarLoop]: 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 02:44:14,945 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:44:14,945 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:44:14,945 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:44:14,945 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:44:14,945 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:44:14,945 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:44:14,945 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:44:14,945 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of8ForFork0======== [2021-06-17 02:44:15,070 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:44:15,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:44:15,070 INFO L82 PathProgramCache]: Analyzing trace with hash 448702711, now seen corresponding path program 1 times [2021-06-17 02:44:15,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:44:15,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586509842] [2021-06-17 02:44:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:44:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:44:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 02:44:15,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:44:15,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586509842] [2021-06-17 02:44:15,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586509842] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:44:15,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:44:15,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-17 02:44:15,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764864073] [2021-06-17 02:44:15,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:44:15,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:44:15,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:44:15,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:44:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:44:15,083 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:44:15,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:44:15,083 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:44:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:44:15,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-06-17 02:44:15,097 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:44:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:44:15,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1024882983, now seen corresponding path program 1 times [2021-06-17 02:44:15,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:44:15,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550544135] [2021-06-17 02:44:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:44:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:44:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-17 02:44:15,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:44:15,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550544135] [2021-06-17 02:44:15,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550544135] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:44:15,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:44:15,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:44:15,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044308307] [2021-06-17 02:44:15,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:44:15,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:44:15,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:44:15,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:44:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:44:15,113 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:44:15,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:44:15,113 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:44:15,114 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:46:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:46:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:46:31,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-06-17 02:46:31,779 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:46:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:46:31,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1117784119, now seen corresponding path program 1 times [2021-06-17 02:46:31,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:46:31,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657210973] [2021-06-17 02:46:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:46:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:46:31,782 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:46:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:46:31,783 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:46:31,784 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:46:31,784 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:46:31,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-06-17 02:46:31,785 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of8ForFork0 was UNSAFE (3/10) [2021-06-17 02:46:31,785 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:46:31,801 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:46:31,801 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:46:31,801 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:46:31,801 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:46:31,801 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:46:31,801 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:46:31,801 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:46:31,801 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of8ForFork0======== [2021-06-17 02:46:32,010 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:46:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:46:32,011 INFO L82 PathProgramCache]: Analyzing trace with hash 136807969, now seen corresponding path program 1 times [2021-06-17 02:46:32,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:46:32,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525536722] [2021-06-17 02:46:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:46:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:46:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-17 02:46:32,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:46:32,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525536722] [2021-06-17 02:46:32,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525536722] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:46:32,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:46:32,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:46:32,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124038650] [2021-06-17 02:46:32,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:46:32,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:46:32,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:46:32,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:46:32,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:46:32,031 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:46:32,031 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 02:46:32,031 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:46:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:46:32,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-06-17 02:46:32,062 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:46:32,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:46:32,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1024311650, now seen corresponding path program 1 times [2021-06-17 02:46:32,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:46:32,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803061705] [2021-06-17 02:46:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:46:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:46:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-17 02:46:32,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:46:32,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803061705] [2021-06-17 02:46:32,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803061705] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:46:32,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:46:32,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-17 02:46:32,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883021014] [2021-06-17 02:46:32,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:46:32,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:46:32,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:46:32,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:46:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:46:32,094 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:46:32,094 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 02:46:32,094 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:46:32,094 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:46:32,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:46:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:46:32,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-06-17 02:46:32,119 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:46:32,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:46:32,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1025235171, now seen corresponding path program 1 times [2021-06-17 02:46:32,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:46:32,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366877082] [2021-06-17 02:46:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:46:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:46:32,122 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:46:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:46:32,123 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:46:32,124 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:46:32,124 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:46:32,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-06-17 02:46:32,125 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of8ForFork0 was UNSAFE (4/10) [2021-06-17 02:46:32,125 INFO L255 AbstractCegarLoop]: 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) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:46:32,142 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:46:32,142 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:46:32,142 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:46:32,142 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:46:32,143 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:46:32,143 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:46:32,143 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:46:32,143 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of8ForFork0======== [2021-06-17 02:47:09,835 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:47:09,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:47:09,836 INFO L82 PathProgramCache]: Analyzing trace with hash -684641198, now seen corresponding path program 1 times [2021-06-17 02:47:09,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:47:09,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755253076] [2021-06-17 02:47:09,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:47:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:47:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-17 02:47:09,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:47:09,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755253076] [2021-06-17 02:47:09,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755253076] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:47:09,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:47:09,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:47:09,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213383456] [2021-06-17 02:47:09,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:47:09,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:47:09,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:47:09,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:47:09,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:47:09,887 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:47:09,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-17 02:47:09,887 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:47:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:47:09,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-06-17 02:47:09,951 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:47:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:47:09,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1802871635, now seen corresponding path program 1 times [2021-06-17 02:47:09,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:47:09,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011309026] [2021-06-17 02:47:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:47:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:47:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-17 02:47:09,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:47:09,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011309026] [2021-06-17 02:47:09,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011309026] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:47:09,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:47:09,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-17 02:47:09,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044162135] [2021-06-17 02:47:09,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:47:09,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:47:09,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:47:09,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:47:09,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:47:09,973 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:47:09,973 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 02:47:09,973 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:47:09,973 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:47:10,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:47:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:47:10,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-17 02:47:10,028 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:47:10,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:47:10,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1604591980, now seen corresponding path program 1 times [2021-06-17 02:47:10,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:47:10,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146659484] [2021-06-17 02:47:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:47:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:47:10,032 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:47:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:47:10,034 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:47:10,038 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:47:10,039 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:47:10,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-06-17 02:47:10,039 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of8ForFork0 was UNSAFE (5/10) [2021-06-17 02:47:10,040 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 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 02:47:10,061 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:47:10,061 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:47:10,061 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:47:10,061 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:47:10,061 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:47:10,061 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:47:10,061 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:47:10,061 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of8ForFork0======== [2021-06-17 02:47:10,965 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:47:10,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:47:10,965 INFO L82 PathProgramCache]: Analyzing trace with hash -50217679, now seen corresponding path program 1 times [2021-06-17 02:47:10,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:47:10,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626398970] [2021-06-17 02:47:10,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:47:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:47:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-17 02:47:10,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:47:10,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626398970] [2021-06-17 02:47:10,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626398970] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:47:10,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:47:10,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-17 02:47:10,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008279179] [2021-06-17 02:47:10,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-17 02:47:10,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:47:10,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-17 02:47:10,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-17 02:47:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:47:10,978 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:47:10,978 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 02:47:10,978 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:47:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:47:11,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-06-17 02:47:11,004 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:47:11,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:47:11,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1857672142, now seen corresponding path program 1 times [2021-06-17 02:47:11,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:47:11,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445496786] [2021-06-17 02:47:11,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:47:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-17 02:47:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-17 02:47:11,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-17 02:47:11,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445496786] [2021-06-17 02:47:11,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445496786] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-17 02:47:11,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-17 02:47:11,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-17 02:47:11,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850832195] [2021-06-17 02:47:11,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-17 02:47:11,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-17 02:47:11,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-17 02:47:11,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-17 02:47:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:47:11,027 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-17 02:47:11,027 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 02:47:11,027 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:47:11,027 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-17 02:47:11,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-17 02:47:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-17 02:47:11,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-06-17 02:47:11,058 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-17 02:47:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-17 02:47:11,058 INFO L82 PathProgramCache]: Analyzing trace with hash -970168461, now seen corresponding path program 1 times [2021-06-17 02:47:11,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-17 02:47:11,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881118238] [2021-06-17 02:47:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-17 02:47:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:47:11,065 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:47:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-17 02:47:11,067 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-17 02:47:11,068 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-17 02:47:11,068 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-17 02:47:11,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-06-17 02:47:11,069 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of8ForFork0 was UNSAFE (6/10) [2021-06-17 02:47:11,069 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-17 02:47:11,099 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-17 02:47:11,099 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-17 02:47:11,099 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-17 02:47:11,099 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-17 02:47:11,099 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-17 02:47:11,099 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-17 02:47:11,099 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-17 02:47:11,099 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown