/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-NewStatesSleepPersistentFixedOrder-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-14 15:24:27,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-14 15:24:27,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-14 15:24:27,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-14 15:24:27,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-14 15:24:27,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-14 15:24:27,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-14 15:24:27,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-14 15:24:27,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-14 15:24:27,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-14 15:24:27,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-14 15:24:27,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-14 15:24:27,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-14 15:24:27,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-14 15:24:27,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-14 15:24:27,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-14 15:24:27,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-14 15:24:27,491 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-NewStatesSleepPersistentFixedOrder-NoLbe.epf [2021-06-14 15:24:27,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-14 15:24:27,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-14 15:24:27,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-14 15:24:27,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-14 15:24:27,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-14 15:24:27,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-14 15:24:27,526 INFO L138 SettingsManager]: * Use SBE=true [2021-06-14 15:24:27,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-14 15:24:27,526 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-14 15:24:27,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-14 15:24:27,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-14 15:24:27,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-14 15:24:27,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-14 15:24:27,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-14 15:24:27,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-14 15:24:27,528 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-14 15:24:27,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-14 15:24:27,528 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-14 15:24:27,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-14 15:24:27,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-14 15:24:27,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-14 15:24:27,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-14 15:24:27,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-14 15:24:27,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-14 15:24:27,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-14 15:24:27,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-14 15:24:27,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-14 15:24:27,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-14 15:24:27,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-14 15:24:27,529 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-14 15:24:27,529 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-06-14 15:24:27,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-14 15:24:27,530 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2021-06-14 15:24:27,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-14 15:24:27,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-14 15:24:27,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-14 15:24:27,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-14 15:24:27,772 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-14 15:24:27,773 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-14 15:24:27,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl [2021-06-14 15:24:27,773 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl' [2021-06-14 15:24:27,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-14 15:24:27,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-14 15:24:27,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-14 15:24:27,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-14 15:24:27,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-14 15:24:27,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 03:24:27" (1/1) ... [2021-06-14 15:24:27,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 03:24:27" (1/1) ... [2021-06-14 15:24:27,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-14 15:24:27,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-14 15:24:27,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-14 15:24:27,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-14 15:24:27,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 03:24:27" (1/1) ... [2021-06-14 15:24:27,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 03:24:27" (1/1) ... [2021-06-14 15:24:27,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 03:24:27" (1/1) ... [2021-06-14 15:24:27,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 03:24:27" (1/1) ... [2021-06-14 15:24:27,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 03:24:27" (1/1) ... [2021-06-14 15:24:27,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 03:24:27" (1/1) ... [2021-06-14 15:24:27,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 03:24:27" (1/1) ... [2021-06-14 15:24:27,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-14 15:24:27,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-14 15:24:27,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-14 15:24:27,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-14 15:24:27,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 03:24:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-14 15:24:27,883 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-14 15:24:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-14 15:24:27,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-14 15:24:27,883 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-06-14 15:24:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-06-14 15:24:27,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-06-14 15:24:27,884 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-14 15:24:27,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-14 15:24:27,978 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-14 15:24:27,979 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 03:24:27 BoogieIcfgContainer [2021-06-14 15:24:27,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-14 15:24:27,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-14 15:24:27,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-14 15:24:27,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-14 15:24:27,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.06 03:24:27" (1/2) ... [2021-06-14 15:24:27,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273b057a and model type fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 03:24:27, skipping insertion in model container [2021-06-14 15:24:27,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 03:24:27" (2/2) ... [2021-06-14 15:24:27,984 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_unsafe.bpl [2021-06-14 15:24:27,988 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-14 15:24:27,988 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-14 15:24:27,988 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-14 15:24:27,988 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-14 15:24:28,000 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:28,000 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:28,001 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:28,001 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:28,005 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 15:24:28,018 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:28,067 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:28,067 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:28,067 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:28,067 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:28,068 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:28,068 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:28,070 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:28,070 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread1of1ForFork0======== [2021-06-14 15:24:28,095 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:28,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:28,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1497746417, now seen corresponding path program 1 times [2021-06-14 15:24:28,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:28,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139664991] [2021-06-14 15:24:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:24:28,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:28,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139664991] [2021-06-14 15:24:28,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139664991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:28,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172690397] [2021-06-14 15:24:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:28,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 15:24:28,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:24:28,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172690397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:28,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:28,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-14 15:24:28,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831331467] [2021-06-14 15:24:28,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-14 15:24:28,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:28,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-14 15:24:28,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-14 15:24:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:28,517 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:28,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:28,520 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:28,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:28,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-06-14 15:24:28,791 INFO L301 ceAbstractionStarter]: Result for error location threadThread1of1ForFork0 was SAFE (1/3) [2021-06-14 15:24:28,792 INFO L255 AbstractCegarLoop]: 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) [2021-06-14 15:24:28,811 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:28,811 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:28,811 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:28,811 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:28,811 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:28,812 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:28,812 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:28,812 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 15:24:28,814 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:28,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:28,815 INFO L82 PathProgramCache]: Analyzing trace with hash 43134170, now seen corresponding path program 1 times [2021-06-14 15:24:28,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:28,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964874761] [2021-06-14 15:24:28,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:28,818 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:28,820 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:28,830 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:24:28,831 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:24:28,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-14 15:24:28,836 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (2/3) [2021-06-14 15:24:28,837 WARN L243 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 15:24:28,837 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-14 15:24:28,840 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:28,841 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:28,842 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:28,842 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:28,843 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:28,843 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:28,843 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:28,843 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:28,845 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 15:24:28,846 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 15:24:28,858 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:28,858 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:28,858 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:28,858 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:28,858 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:28,858 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:28,859 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:28,859 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread1of2ForFork0======== Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:28,908 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:28,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:28,908 INFO L82 PathProgramCache]: Analyzing trace with hash -622647166, now seen corresponding path program 1 times [2021-06-14 15:24:28,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:28,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406516319] [2021-06-14 15:24:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:24:28,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:28,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406516319] [2021-06-14 15:24:28,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406516319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:28,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066892478] [2021-06-14 15:24:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-14 15:24:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:29,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 15:24:29,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:24:29,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066892478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:29,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:29,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-14 15:24:29,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636647377] [2021-06-14 15:24:29,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-14 15:24:29,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:29,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-14 15:24:29,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-14 15:24:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:29,077 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:29,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:29,077 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:29,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:29,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:29,407 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:29,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:29,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1601042800, now seen corresponding path program 1 times [2021-06-14 15:24:29,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:29,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591731814] [2021-06-14 15:24:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 15:24:29,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:29,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591731814] [2021-06-14 15:24:29,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591731814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:29,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271268642] [2021-06-14 15:24:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:29,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-14 15:24:29,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 15:24:29,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271268642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:29,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:29,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-14 15:24:29,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27714168] [2021-06-14 15:24:29,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-14 15:24:29,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:29,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-14 15:24:29,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-14 15:24:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:29,554 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:29,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:29,554 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:29,554 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 15:24:29,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:29,874 INFO L301 ceAbstractionStarter]: Result for error location threadThread1of2ForFork0 was SAFE (1/4) [2021-06-14 15:24:29,874 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-14 15:24:29,881 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:29,881 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:29,881 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:29,882 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:29,882 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:29,882 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:29,882 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:29,882 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 15:24:29,915 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:29,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:29,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1356044644, now seen corresponding path program 1 times [2021-06-14 15:24:29,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:29,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6054924] [2021-06-14 15:24:29,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:29,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:29,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6054924] [2021-06-14 15:24:29,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6054924] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:24:29,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:24:29,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:24:29,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865027003] [2021-06-14 15:24:29,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:24:29,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:29,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:24:29,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:24:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:29,939 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:29,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:29,940 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:29,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:29,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-14 15:24:29,967 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:29,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:29,968 INFO L82 PathProgramCache]: Analyzing trace with hash 913015247, now seen corresponding path program 1 times [2021-06-14 15:24:29,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:29,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962730872] [2021-06-14 15:24:29,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:29,972 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:29,974 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:29,975 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:24:29,975 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:24:29,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-14 15:24:29,977 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (2/4) [2021-06-14 15:24:29,977 WARN L243 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 15:24:29,977 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-14 15:24:29,979 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:29,980 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:29,980 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:29,980 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:29,980 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:29,980 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:29,980 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:29,980 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:29,981 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:29,981 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:29,981 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:29,981 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:29,983 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 15:24:29,984 INFO L255 AbstractCegarLoop]: 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) [2021-06-14 15:24:30,006 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:30,006 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:30,006 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:30,006 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:30,006 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:30,007 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:30,007 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:30,007 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:30,059 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:30,060 INFO L82 PathProgramCache]: Analyzing trace with hash -750976532, now seen corresponding path program 1 times [2021-06-14 15:24:30,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:30,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663489071] [2021-06-14 15:24:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 15:24:30,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:30,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663489071] [2021-06-14 15:24:30,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663489071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:30,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929137775] [2021-06-14 15:24:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:30,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 15:24:30,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:24:30,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929137775] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:24:30,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-14 15:24:30,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-06-14 15:24:30,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481536060] [2021-06-14 15:24:30,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:24:30,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:30,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:24:30,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-14 15:24:30,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:30,179 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:30,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:30,179 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:30,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:30,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:30,425 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:30,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:30,426 INFO L82 PathProgramCache]: Analyzing trace with hash 890789755, now seen corresponding path program 1 times [2021-06-14 15:24:30,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:30,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692857597] [2021-06-14 15:24:30,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 15:24:30,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:30,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692857597] [2021-06-14 15:24:30,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692857597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:30,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244498528] [2021-06-14 15:24:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:30,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:24:30,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:30,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244498528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:30,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:30,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:24:30,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228263248] [2021-06-14 15:24:30,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:24:30,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:30,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:24:30,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:24:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:30,538 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:30,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:30,539 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:30,539 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-14 15:24:30,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:30,825 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:30,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1845379794, now seen corresponding path program 1 times [2021-06-14 15:24:30,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:30,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113362752] [2021-06-14 15:24:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:30,833 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:30,839 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:30,843 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:24:30,844 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:24:30,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-14 15:24:30,845 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (1/5) [2021-06-14 15:24:30,845 WARN L243 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 15:24:30,845 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-14 15:24:30,848 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,849 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,849 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,849 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,850 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,850 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,850 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,850 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,850 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,850 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,850 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,850 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,851 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,851 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,851 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,851 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:30,853 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 15:24:30,854 INFO L255 AbstractCegarLoop]: 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) [2021-06-14 15:24:30,862 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:30,862 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:30,862 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:30,862 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:30,862 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:30,862 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:30,862 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:30,862 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread3of4ForFork0======== Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:30,962 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:30,962 INFO L82 PathProgramCache]: Analyzing trace with hash -184060610, now seen corresponding path program 1 times [2021-06-14 15:24:30,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:30,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303007136] [2021-06-14 15:24:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:24:30,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:30,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303007136] [2021-06-14 15:24:30,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303007136] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:24:30,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:24:30,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:24:30,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902693798] [2021-06-14 15:24:30,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:24:30,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:30,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:24:30,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:24:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:30,999 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:30,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:30,999 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:31,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:31,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-14 15:24:31,041 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:31,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:31,041 INFO L82 PathProgramCache]: Analyzing trace with hash 56937680, now seen corresponding path program 1 times [2021-06-14 15:24:31,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:31,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895405866] [2021-06-14 15:24:31,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 15:24:31,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:31,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895405866] [2021-06-14 15:24:31,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895405866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:31,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521227870] [2021-06-14 15:24:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:31,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:24:31,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:31,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521227870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:31,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:31,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:24:31,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074006904] [2021-06-14 15:24:31,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:24:31,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:31,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:24:31,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:24:31,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:31,202 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:31,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:31,202 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:31,202 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-14 15:24:31,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:31,526 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:31,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:31,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1851863692, now seen corresponding path program 1 times [2021-06-14 15:24:31,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:31,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852288272] [2021-06-14 15:24:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:24:31,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:31,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852288272] [2021-06-14 15:24:31,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852288272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:31,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720167269] [2021-06-14 15:24:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:31,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:24:31,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:24:31,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720167269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:31,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:31,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2021-06-14 15:24:31,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867533520] [2021-06-14 15:24:31,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:24:31,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:31,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:24:31,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:24:31,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:31,667 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:31,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:31,667 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:31,667 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 13 states. [2021-06-14 15:24:31,667 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-14 15:24:32,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-14 15:24:32,093 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:32,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:32,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1488644276, now seen corresponding path program 1 times [2021-06-14 15:24:32,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:32,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295753277] [2021-06-14 15:24:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-14 15:24:32,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:32,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295753277] [2021-06-14 15:24:32,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295753277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:32,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157662973] [2021-06-14 15:24:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-14 15:24:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:32,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-14 15:24:32,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 15:24:32,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157662973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:32,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:32,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 14 [2021-06-14 15:24:32,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078522597] [2021-06-14 15:24:32,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-14 15:24:32,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:32,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-14 15:24:32,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-14 15:24:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:32,291 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:32,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:32,291 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:32,291 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:32,291 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 15 states. [2021-06-14 15:24:32,291 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-14 15:24:33,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-14 15:24:33,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:33,486 INFO L301 ceAbstractionStarter]: Result for error location threadThread3of4ForFork0 was SAFE (1/6) [2021-06-14 15:24:33,487 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:33,533 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:33,533 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:33,533 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:33,533 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:33,533 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:33,533 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:33,533 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:33,534 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread1of4ForFork0======== [2021-06-14 15:24:33,583 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:33,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1998956631, now seen corresponding path program 1 times [2021-06-14 15:24:33,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:33,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847449810] [2021-06-14 15:24:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:24:33,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:33,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847449810] [2021-06-14 15:24:33,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847449810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:33,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032463289] [2021-06-14 15:24:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:33,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 15:24:33,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:24:33,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032463289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:33,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:33,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-14 15:24:33,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148072153] [2021-06-14 15:24:33,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-14 15:24:33,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:33,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-14 15:24:33,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-14 15:24:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:33,659 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:33,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:33,659 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:33,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:33,957 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:33,957 INFO L82 PathProgramCache]: Analyzing trace with hash 707352117, now seen corresponding path program 1 times [2021-06-14 15:24:33,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:33,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461186332] [2021-06-14 15:24:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 15:24:33,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:33,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461186332] [2021-06-14 15:24:33,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461186332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:33,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572821070] [2021-06-14 15:24:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:34,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:24:34,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:34,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572821070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:34,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:34,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:24:34,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484352951] [2021-06-14 15:24:34,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:24:34,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:34,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:24:34,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:24:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:34,080 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:34,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:34,080 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:34,080 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:34,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:34,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:34,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-14 15:24:34,449 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:34,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:34,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1131114551, now seen corresponding path program 1 times [2021-06-14 15:24:34,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:34,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686508493] [2021-06-14 15:24:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:34,452 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:34,455 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:34,456 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:24:34,456 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:24:34,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-14 15:24:34,457 INFO L301 ceAbstractionStarter]: Result for error location threadThread1of4ForFork0 was UNSAFE (2/6) [2021-06-14 15:24:34,471 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 15:24:34,484 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:34,485 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:34,485 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:34,485 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:34,485 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:34,485 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:34,485 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:34,485 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread2of4ForFork0======== Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:34,547 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:34,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:34,548 INFO L82 PathProgramCache]: Analyzing trace with hash 506983626, now seen corresponding path program 1 times [2021-06-14 15:24:34,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:34,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977138036] [2021-06-14 15:24:34,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:34,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:34,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977138036] [2021-06-14 15:24:34,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977138036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:34,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112770828] [2021-06-14 15:24:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:34,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 15:24:34,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:34,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112770828] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:24:34,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-14 15:24:34,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-06-14 15:24:34,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620884354] [2021-06-14 15:24:34,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:24:34,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:34,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:24:34,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-14 15:24:34,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:34,640 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:34,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:34,640 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:34,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:34,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-14 15:24:34,867 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:34,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:34,867 INFO L82 PathProgramCache]: Analyzing trace with hash -872159908, now seen corresponding path program 1 times [2021-06-14 15:24:34,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:34,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982082451] [2021-06-14 15:24:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:34,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:34,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982082451] [2021-06-14 15:24:34,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982082451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:34,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160630807] [2021-06-14 15:24:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:34,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:24:34,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:24:34,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160630807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:34,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:34,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-14 15:24:34,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504179977] [2021-06-14 15:24:34,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:24:34,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:34,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:24:34,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:24:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:34,979 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:34,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:34,979 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:34,979 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:35,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:35,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-14 15:24:35,322 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:35,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:35,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1364486266, now seen corresponding path program 1 times [2021-06-14 15:24:35,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:35,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690932533] [2021-06-14 15:24:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 15:24:35,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:35,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690932533] [2021-06-14 15:24:35,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690932533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:35,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57741611] [2021-06-14 15:24:35,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:35,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:24:35,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:35,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57741611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:35,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:35,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:24:35,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175272181] [2021-06-14 15:24:35,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:24:35,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:35,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:24:35,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:24:35,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:35,473 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:35,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:35,473 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:35,473 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:35,473 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-14 15:24:35,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:35,783 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:35,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:35,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1071884000, now seen corresponding path program 1 times [2021-06-14 15:24:35,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:35,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735039911] [2021-06-14 15:24:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:35,787 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:35,788 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:35,790 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:24:35,790 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:24:35,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-14 15:24:35,791 INFO L301 ceAbstractionStarter]: Result for error location threadThread2of4ForFork0 was UNSAFE (3/6) [2021-06-14 15:24:35,791 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:35,812 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:35,812 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:35,812 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:35,812 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:35,812 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:35,812 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:35,812 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:35,812 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread4of4ForFork0======== [2021-06-14 15:24:35,864 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:35,864 INFO L82 PathProgramCache]: Analyzing trace with hash 935761587, now seen corresponding path program 1 times [2021-06-14 15:24:35,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:35,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820373122] [2021-06-14 15:24:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 15:24:35,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:35,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820373122] [2021-06-14 15:24:35,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820373122] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:24:35,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:24:35,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:24:35,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518337968] [2021-06-14 15:24:35,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:24:35,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:35,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:24:35,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:24:35,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:35,882 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:35,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:35,883 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:35,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:35,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-14 15:24:35,917 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:35,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:35,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1582705339, now seen corresponding path program 1 times [2021-06-14 15:24:35,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:35,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938555141] [2021-06-14 15:24:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 15:24:35,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:35,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938555141] [2021-06-14 15:24:35,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938555141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:35,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608741413] [2021-06-14 15:24:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:35,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:24:35,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:24:36,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608741413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:36,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:36,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:24:36,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301405609] [2021-06-14 15:24:36,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:24:36,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:24:36,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:24:36,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:36,024 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:36,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:36,024 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:36,024 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:36,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-14 15:24:36,369 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:36,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1947540503, now seen corresponding path program 1 times [2021-06-14 15:24:36,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:36,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587984883] [2021-06-14 15:24:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 15:24:36,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:36,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587984883] [2021-06-14 15:24:36,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587984883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:36,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007892481] [2021-06-14 15:24:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:36,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:24:36,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:36,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007892481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:36,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:36,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:24:36,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789094884] [2021-06-14 15:24:36,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:24:36,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:36,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:24:36,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:24:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:36,551 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:36,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:36,552 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:36,552 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:36,552 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-14 15:24:36,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:36,873 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash 177071717, now seen corresponding path program 1 times [2021-06-14 15:24:36,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:36,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201799679] [2021-06-14 15:24:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:24:36,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:36,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201799679] [2021-06-14 15:24:36,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201799679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:36,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499492993] [2021-06-14 15:24:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:36,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 15:24:36,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:24:37,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499492993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:37,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:37,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 16 [2021-06-14 15:24:37,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369158950] [2021-06-14 15:24:37,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-14 15:24:37,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:37,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-14 15:24:37,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-14 15:24:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:37,065 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:37,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:37,065 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:37,065 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:37,065 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 15 states. [2021-06-14 15:24:37,065 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-14 15:24:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-14 15:24:38,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-14 15:24:38,070 INFO L301 ceAbstractionStarter]: Result for error location threadThread4of4ForFork0 was SAFE (4/6) [2021-06-14 15:24:38,070 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:38,073 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:38,074 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:38,074 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:38,074 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:38,074 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:38,074 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:38,074 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:38,074 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 15:24:38,119 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:38,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:38,119 INFO L82 PathProgramCache]: Analyzing trace with hash -781148278, now seen corresponding path program 1 times [2021-06-14 15:24:38,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:38,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929998963] [2021-06-14 15:24:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 15:24:38,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:38,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929998963] [2021-06-14 15:24:38,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929998963] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:24:38,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:24:38,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:24:38,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553070224] [2021-06-14 15:24:38,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:24:38,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:38,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:24:38,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:24:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:38,134 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:38,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:38,135 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:38,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-14 15:24:38,170 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:38,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:38,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1110025572, now seen corresponding path program 1 times [2021-06-14 15:24:38,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:38,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860739277] [2021-06-14 15:24:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 15:24:38,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:38,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860739277] [2021-06-14 15:24:38,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860739277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:38,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848099332] [2021-06-14 15:24:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:38,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:24:38,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:24:38,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848099332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:38,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:38,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:24:38,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78670175] [2021-06-14 15:24:38,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:24:38,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:38,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:24:38,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:24:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:38,274 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:38,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:38,274 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:38,274 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:38,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-14 15:24:38,577 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:38,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:38,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1517108672, now seen corresponding path program 1 times [2021-06-14 15:24:38,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:38,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397944397] [2021-06-14 15:24:38,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 15:24:38,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:38,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397944397] [2021-06-14 15:24:38,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397944397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:38,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769664105] [2021-06-14 15:24:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:38,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:24:38,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:38,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769664105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:38,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:38,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:24:38,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941240988] [2021-06-14 15:24:38,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:24:38,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:38,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:24:38,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:24:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:38,831 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:38,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:38,831 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:38,831 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:38,831 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:38,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:38,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:38,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-14 15:24:39,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-14 15:24:39,135 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:39,136 INFO L82 PathProgramCache]: Analyzing trace with hash 214709180, now seen corresponding path program 1 times [2021-06-14 15:24:39,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:39,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711505228] [2021-06-14 15:24:39,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:39,138 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:39,140 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:39,141 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:24:39,141 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:24:39,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-14 15:24:39,142 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (5/6) [2021-06-14 15:24:39,142 WARN L243 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 15:24:39,142 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-06-14 15:24:39,148 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,149 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,149 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,149 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,149 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,150 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,150 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,150 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,151 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,151 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,151 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,151 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,151 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,151 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,151 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,151 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,151 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,151 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,151 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,151 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:39,154 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 15:24:39,155 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:39,163 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:39,163 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:39,163 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:39,163 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:39,163 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:39,163 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:39,164 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:39,164 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread1of5ForFork0======== [2021-06-14 15:24:39,211 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:39,211 INFO L82 PathProgramCache]: Analyzing trace with hash -549506375, now seen corresponding path program 1 times [2021-06-14 15:24:39,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:39,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396621287] [2021-06-14 15:24:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:24:39,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:39,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396621287] [2021-06-14 15:24:39,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396621287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:39,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243011369] [2021-06-14 15:24:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:39,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 15:24:39,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:24:39,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243011369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:39,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:39,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-14 15:24:39,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645338513] [2021-06-14 15:24:39,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-14 15:24:39,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:39,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-14 15:24:39,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-14 15:24:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:39,290 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:39,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:39,291 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:39,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:39,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:39,680 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:39,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:39,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1216568561, now seen corresponding path program 1 times [2021-06-14 15:24:39,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:39,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427392853] [2021-06-14 15:24:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 15:24:39,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:39,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427392853] [2021-06-14 15:24:39,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427392853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:39,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630016940] [2021-06-14 15:24:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:39,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:24:39,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:39,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630016940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:39,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:39,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:24:39,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908099698] [2021-06-14 15:24:39,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:24:39,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:39,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:24:39,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:24:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:39,820 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:39,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:39,820 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:39,820 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:40,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:40,340 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:40,341 INFO L82 PathProgramCache]: Analyzing trace with hash -488391283, now seen corresponding path program 1 times [2021-06-14 15:24:40,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:40,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443748119] [2021-06-14 15:24:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:40,343 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:40,344 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:40,345 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:24:40,345 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:24:40,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-14 15:24:40,346 INFO L301 ceAbstractionStarter]: Result for error location threadThread1of5ForFork0 was UNSAFE (1/7) [2021-06-14 15:24:40,346 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:40,352 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:40,352 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:40,352 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:40,352 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:40,352 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:40,352 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:40,352 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:40,352 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread2of5ForFork0======== [2021-06-14 15:24:40,401 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:40,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1664654288, now seen corresponding path program 1 times [2021-06-14 15:24:40,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:40,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242442078] [2021-06-14 15:24:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:40,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:40,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242442078] [2021-06-14 15:24:40,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242442078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:40,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027788149] [2021-06-14 15:24:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:40,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 15:24:40,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:40,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027788149] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:24:40,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-14 15:24:40,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-06-14 15:24:40,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985827846] [2021-06-14 15:24:40,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:24:40,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:24:40,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-14 15:24:40,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:40,472 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:40,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:40,472 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:40,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:40,692 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:40,692 INFO L82 PathProgramCache]: Analyzing trace with hash 301206240, now seen corresponding path program 1 times [2021-06-14 15:24:40,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:40,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092240223] [2021-06-14 15:24:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:40,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:40,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092240223] [2021-06-14 15:24:40,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092240223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:40,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620333385] [2021-06-14 15:24:40,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:40,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:24:40,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:24:40,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620333385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:40,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:40,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-14 15:24:40,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106487499] [2021-06-14 15:24:40,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:24:40,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:40,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:24:40,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:24:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:40,806 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:40,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:40,806 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:40,806 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:41,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-14 15:24:41,137 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:41,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2084075804, now seen corresponding path program 1 times [2021-06-14 15:24:41,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:41,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929215243] [2021-06-14 15:24:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 15:24:41,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:41,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929215243] [2021-06-14 15:24:41,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929215243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:41,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465169895] [2021-06-14 15:24:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:41,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:24:41,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:41,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465169895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:41,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:41,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:24:41,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972373296] [2021-06-14 15:24:41,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:24:41,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:41,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:24:41,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:24:41,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:41,314 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:41,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:41,314 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:41,314 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:41,314 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-14 15:24:41,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:41,655 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:41,656 INFO L82 PathProgramCache]: Analyzing trace with hash 357651920, now seen corresponding path program 1 times [2021-06-14 15:24:41,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:41,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420582149] [2021-06-14 15:24:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:41,663 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:41,676 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:41,677 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:24:41,677 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:24:41,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-14 15:24:41,678 INFO L301 ceAbstractionStarter]: Result for error location threadThread2of5ForFork0 was UNSAFE (2/7) [2021-06-14 15:24:41,678 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 15:24:41,685 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:41,686 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:41,686 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:41,686 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:41,686 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:41,686 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:41,686 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:41,686 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread3of5ForFork0======== Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:41,745 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:41,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:41,746 INFO L82 PathProgramCache]: Analyzing trace with hash -490034904, now seen corresponding path program 1 times [2021-06-14 15:24:41,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:41,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46799595] [2021-06-14 15:24:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:24:41,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:41,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46799595] [2021-06-14 15:24:41,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46799595] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:24:41,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:24:41,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:24:41,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649687994] [2021-06-14 15:24:41,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:24:41,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:41,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:24:41,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:24:41,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:41,764 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:41,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:41,764 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:41,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-14 15:24:41,793 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash 249853912, now seen corresponding path program 1 times [2021-06-14 15:24:41,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:41,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180557762] [2021-06-14 15:24:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 15:24:41,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:41,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180557762] [2021-06-14 15:24:41,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180557762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:41,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147282538] [2021-06-14 15:24:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:41,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:24:41,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:41,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147282538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:41,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:41,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:24:41,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742095852] [2021-06-14 15:24:41,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:24:41,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:41,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:24:41,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:24:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:41,914 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:41,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:41,914 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:41,914 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-14 15:24:42,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-14 15:24:42,188 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:42,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:42,188 INFO L82 PathProgramCache]: Analyzing trace with hash -391774570, now seen corresponding path program 1 times [2021-06-14 15:24:42,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:42,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596103360] [2021-06-14 15:24:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:24:42,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:42,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596103360] [2021-06-14 15:24:42,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596103360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:42,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996129593] [2021-06-14 15:24:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:42,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:24:42,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:24:42,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996129593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:42,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:42,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2021-06-14 15:24:42,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98573343] [2021-06-14 15:24:42,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:24:42,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:42,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:24:42,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:24:42,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:42,310 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:42,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:42,310 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:42,310 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 13 states. [2021-06-14 15:24:42,310 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:24:42,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-14 15:24:42,701 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:42,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1252092812, now seen corresponding path program 1 times [2021-06-14 15:24:42,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:42,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711986577] [2021-06-14 15:24:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-14 15:24:42,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:42,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711986577] [2021-06-14 15:24:42,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711986577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:42,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232303551] [2021-06-14 15:24:42,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:42,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 15:24:42,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:42,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232303551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:42,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:42,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 15 [2021-06-14 15:24:42,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210854264] [2021-06-14 15:24:42,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-14 15:24:42,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:42,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-14 15:24:42,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-14 15:24:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:42,891 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:42,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:42,891 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:42,891 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:42,891 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:24:42,891 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:24:43,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-14 15:24:43,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-14 15:24:43,229 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:43,229 INFO L82 PathProgramCache]: Analyzing trace with hash 580652074, now seen corresponding path program 1 times [2021-06-14 15:24:43,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:43,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450777246] [2021-06-14 15:24:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:43,232 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:43,234 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:43,240 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:24:43,240 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:24:43,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-14 15:24:43,241 INFO L301 ceAbstractionStarter]: Result for error location threadThread3of5ForFork0 was UNSAFE (3/7) [2021-06-14 15:24:43,241 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:43,250 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:43,250 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:43,250 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:43,250 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:43,250 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:43,250 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:43,250 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:43,250 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 15:24:43,307 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:43,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:43,307 INFO L82 PathProgramCache]: Analyzing trace with hash -318486090, now seen corresponding path program 1 times [2021-06-14 15:24:43,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:43,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019546423] [2021-06-14 15:24:43,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 15:24:43,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:43,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019546423] [2021-06-14 15:24:43,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019546423] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:24:43,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:24:43,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:24:43,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215069192] [2021-06-14 15:24:43,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:24:43,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:43,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:24:43,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:24:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:43,324 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:43,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:43,324 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:43,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-14 15:24:43,360 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:43,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:43,360 INFO L82 PathProgramCache]: Analyzing trace with hash -2074848154, now seen corresponding path program 1 times [2021-06-14 15:24:43,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:43,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577994630] [2021-06-14 15:24:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-14 15:24:43,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:43,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577994630] [2021-06-14 15:24:43,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577994630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:43,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953354798] [2021-06-14 15:24:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:43,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:24:43,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 15:24:43,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953354798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:43,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:43,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:24:43,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871318439] [2021-06-14 15:24:43,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:24:43,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:43,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:24:43,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:24:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:43,496 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:43,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:43,496 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:43,496 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:43,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:43,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:43,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-14 15:24:43,797 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:43,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:43,797 INFO L82 PathProgramCache]: Analyzing trace with hash 255415460, now seen corresponding path program 1 times [2021-06-14 15:24:43,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:43,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382704529] [2021-06-14 15:24:43,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-14 15:24:43,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:43,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382704529] [2021-06-14 15:24:43,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382704529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:43,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693463151] [2021-06-14 15:24:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:43,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:24:43,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:24:43,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693463151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:43,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:43,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:24:43,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20923120] [2021-06-14 15:24:43,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:24:43,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:43,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:24:43,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:24:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:43,932 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:43,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:43,933 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:43,933 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:43,933 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:24:44,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:44,247 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:44,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:44,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1717557682, now seen corresponding path program 1 times [2021-06-14 15:24:44,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:44,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761174417] [2021-06-14 15:24:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 15:24:44,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:44,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761174417] [2021-06-14 15:24:44,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761174417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:44,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352005157] [2021-06-14 15:24:44,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:44,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 15:24:44,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:44,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352005157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:44,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:44,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2021-06-14 15:24:44,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819514398] [2021-06-14 15:24:44,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-14 15:24:44,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:44,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-14 15:24:44,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-14 15:24:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:44,443 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:44,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:44,443 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:44,443 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:44,443 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:24:44,443 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:24:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-14 15:24:44,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:44,777 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:44,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1705450762, now seen corresponding path program 1 times [2021-06-14 15:24:44,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:44,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174310662] [2021-06-14 15:24:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:44,779 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:24:44,781 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:24:44,782 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:24:44,782 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:24:44,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-14 15:24:44,783 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (4/7) [2021-06-14 15:24:44,783 WARN L243 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 15:24:44,783 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-06-14 15:24:44,788 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,788 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,788 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,788 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,788 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,788 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,788 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,788 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,789 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,790 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:24:44,793 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 15:24:44,793 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:44,796 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:44,797 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:44,797 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:44,797 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:44,797 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:44,797 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:44,797 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:44,797 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread6of6ForFork0======== [2021-06-14 15:24:44,890 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:44,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:44,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1808348047, now seen corresponding path program 1 times [2021-06-14 15:24:44,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:44,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400695170] [2021-06-14 15:24:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 15:24:44,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:44,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400695170] [2021-06-14 15:24:44,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400695170] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:24:44,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:24:44,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:24:44,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797289434] [2021-06-14 15:24:44,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:24:44,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:44,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:24:44,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:24:44,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:44,910 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:44,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:44,910 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:44,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:44,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-14 15:24:44,953 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:44,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:44,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1601656578, now seen corresponding path program 1 times [2021-06-14 15:24:44,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:44,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943378122] [2021-06-14 15:24:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-06-14 15:24:44,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:44,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943378122] [2021-06-14 15:24:44,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943378122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:44,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487935329] [2021-06-14 15:24:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:45,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:24:45,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 15:24:45,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487935329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:45,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:45,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:24:45,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661154864] [2021-06-14 15:24:45,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:24:45,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:45,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:24:45,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:24:45,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:45,066 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:45,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:45,066 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:45,066 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:45,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-14 15:24:45,384 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:45,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:45,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1270932477, now seen corresponding path program 1 times [2021-06-14 15:24:45,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:45,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115291038] [2021-06-14 15:24:45,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-14 15:24:45,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:45,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115291038] [2021-06-14 15:24:45,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115291038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:45,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108708741] [2021-06-14 15:24:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:45,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:24:45,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 15:24:45,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108708741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:45,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:45,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:24:45,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549239201] [2021-06-14 15:24:45,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:24:45,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:45,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:24:45,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:24:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:45,534 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:45,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:45,534 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:45,534 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:45,534 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:24:45,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-14 15:24:45,903 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:45,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:45,903 INFO L82 PathProgramCache]: Analyzing trace with hash -12868686, now seen corresponding path program 1 times [2021-06-14 15:24:45,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:45,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922227412] [2021-06-14 15:24:45,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-14 15:24:45,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:45,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922227412] [2021-06-14 15:24:45,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922227412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:45,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636885861] [2021-06-14 15:24:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:45,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 15:24:45,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:24:46,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636885861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:46,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:46,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2021-06-14 15:24:46,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960431842] [2021-06-14 15:24:46,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-14 15:24:46,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:46,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-14 15:24:46,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-14 15:24:46,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:46,077 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:46,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:46,077 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:46,078 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:46,078 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:24:46,078 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:46,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:46,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:46,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:24:46,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:24:46,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:46,439 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:46,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1390924795, now seen corresponding path program 1 times [2021-06-14 15:24:46,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:46,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126501936] [2021-06-14 15:24:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-14 15:24:46,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:46,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126501936] [2021-06-14 15:24:46,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126501936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:46,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746170182] [2021-06-14 15:24:46,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:46,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-14 15:24:46,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:24:46,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746170182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:46,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:46,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-06-14 15:24:46,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068696765] [2021-06-14 15:24:46,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-14 15:24:46,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:46,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-14 15:24:46,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-14 15:24:46,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:46,636 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:46,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:46,636 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:46,636 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:46,636 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:24:46,636 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:24:46,636 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:24:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:24:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-14 15:24:47,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-14 15:24:47,059 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:24:47,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:47,060 INFO L82 PathProgramCache]: Analyzing trace with hash 433311182, now seen corresponding path program 1 times [2021-06-14 15:24:47,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:47,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529930347] [2021-06-14 15:24:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 15:24:47,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:47,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529930347] [2021-06-14 15:24:47,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529930347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:47,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359985875] [2021-06-14 15:24:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:47,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-14 15:24:47,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:24:47,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359985875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:47,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:47,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14] total 20 [2021-06-14 15:24:47,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283391282] [2021-06-14 15:24:47,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-14 15:24:47,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:47,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-14 15:24:47,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-14 15:24:47,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:47,300 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:47,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:47,300 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:47,300 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:47,300 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:24:47,300 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:24:47,300 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 20 states. [2021-06-14 15:24:47,300 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:24:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-14 15:24:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-14 15:24:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-14 15:24:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-14 15:24:59,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:59,703 INFO L301 ceAbstractionStarter]: Result for error location threadThread6of6ForFork0 was SAFE (1/8) [2021-06-14 15:24:59,703 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:24:59,707 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:24:59,707 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:24:59,707 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:24:59,707 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:24:59,707 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:24:59,707 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:24:59,707 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:24:59,707 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 15:24:59,788 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:59,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:59,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1950482896, now seen corresponding path program 1 times [2021-06-14 15:24:59,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:59,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216865648] [2021-06-14 15:24:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 15:24:59,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:59,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216865648] [2021-06-14 15:24:59,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216865648] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:24:59,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:24:59,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:24:59,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486511875] [2021-06-14 15:24:59,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:24:59,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:59,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:24:59,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:24:59,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:59,803 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:59,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:59,803 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:59,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:59,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-06-14 15:24:59,843 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:24:59,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:24:59,844 INFO L82 PathProgramCache]: Analyzing trace with hash 470939905, now seen corresponding path program 1 times [2021-06-14 15:24:59,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:24:59,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342481009] [2021-06-14 15:24:59,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:24:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-06-14 15:24:59,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:24:59,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342481009] [2021-06-14 15:24:59,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342481009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:59,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187747072] [2021-06-14 15:24:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:24:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:24:59,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:24:59,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:24:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 15:24:59,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187747072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:24:59,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:24:59,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:24:59,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134497170] [2021-06-14 15:24:59,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:24:59,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:24:59,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:24:59,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:24:59,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:24:59,967 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:24:59,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:24:59,967 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:24:59,967 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:00,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-14 15:25:00,297 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:25:00,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:00,297 INFO L82 PathProgramCache]: Analyzing trace with hash -430372286, now seen corresponding path program 1 times [2021-06-14 15:25:00,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:00,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508225638] [2021-06-14 15:25:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-14 15:25:00,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:00,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508225638] [2021-06-14 15:25:00,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508225638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:00,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912463069] [2021-06-14 15:25:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:00,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:25:00,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 15:25:00,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912463069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:00,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:00,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:25:00,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375187427] [2021-06-14 15:25:00,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:25:00,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:00,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:25:00,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:25:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:00,417 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:00,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:00,417 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:00,417 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:00,417 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:00,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:00,747 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:25:00,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:00,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1327386191, now seen corresponding path program 1 times [2021-06-14 15:25:00,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:00,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885884430] [2021-06-14 15:25:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-14 15:25:00,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:00,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885884430] [2021-06-14 15:25:00,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885884430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:00,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646593633] [2021-06-14 15:25:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:00,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 15:25:00,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:25:00,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646593633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:00,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:00,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2021-06-14 15:25:00,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445508108] [2021-06-14 15:25:00,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-14 15:25:00,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:00,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-14 15:25:00,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-14 15:25:00,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:00,925 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:00,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:00,925 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:00,925 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:00,925 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:00,925 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:25:01,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-14 15:25:01,308 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:25:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:01,308 INFO L82 PathProgramCache]: Analyzing trace with hash -86363452, now seen corresponding path program 1 times [2021-06-14 15:25:01,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:01,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799491995] [2021-06-14 15:25:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-14 15:25:01,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:01,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799491995] [2021-06-14 15:25:01,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799491995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:01,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606725041] [2021-06-14 15:25:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:01,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-14 15:25:01,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:25:01,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606725041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:01,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:01,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-06-14 15:25:01,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997208015] [2021-06-14 15:25:01,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-14 15:25:01,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:01,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-14 15:25:01,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-14 15:25:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:01,509 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:01,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:01,509 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:01,509 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:01,509 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:01,509 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:25:01,509 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:25:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-14 15:25:01,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-14 15:25:01,924 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:25:01,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:01,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1618326221, now seen corresponding path program 1 times [2021-06-14 15:25:01,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:01,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202824674] [2021-06-14 15:25:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:25:01,932 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:25:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:25:01,953 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:25:01,959 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:25:01,960 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:25:01,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-06-14 15:25:01,962 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (2/8) [2021-06-14 15:25:01,962 WARN L243 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 15:25:01,962 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-06-14 15:25:01,979 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,979 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,979 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,979 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,979 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,979 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,979 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,979 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,979 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,979 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,979 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,979 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,980 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:25:01,986 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 15:25:01,986 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 15:25:01,990 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:25:01,990 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:25:01,990 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:25:01,990 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:25:01,991 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:25:01,991 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:25:01,991 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:25:01,991 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread5of7ForFork0======== Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:25:02,180 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:02,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:02,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1502790034, now seen corresponding path program 1 times [2021-06-14 15:25:02,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:02,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185533627] [2021-06-14 15:25:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 15:25:02,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:02,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185533627] [2021-06-14 15:25:02,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185533627] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:25:02,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:25:02,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:25:02,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889545154] [2021-06-14 15:25:02,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:25:02,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:02,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:25:02,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:25:02,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:02,203 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:02,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:02,203 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:02,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-06-14 15:25:02,244 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:02,244 INFO L82 PathProgramCache]: Analyzing trace with hash -330843425, now seen corresponding path program 1 times [2021-06-14 15:25:02,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:02,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737038854] [2021-06-14 15:25:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-14 15:25:02,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:02,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737038854] [2021-06-14 15:25:02,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737038854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:02,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729476078] [2021-06-14 15:25:02,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:02,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:25:02,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 15:25:02,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729476078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:02,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:02,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:25:02,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048408080] [2021-06-14 15:25:02,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:25:02,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:02,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:25:02,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:25:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:02,376 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:02,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:02,376 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:02,376 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:02,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-14 15:25:02,676 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:02,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:02,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2009797668, now seen corresponding path program 1 times [2021-06-14 15:25:02,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:02,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760163246] [2021-06-14 15:25:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-14 15:25:02,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:02,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760163246] [2021-06-14 15:25:02,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760163246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:02,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978531642] [2021-06-14 15:25:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:02,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:25:02,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:25:02,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978531642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:02,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:02,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:25:02,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279057793] [2021-06-14 15:25:02,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:25:02,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:02,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:25:02,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:25:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:02,821 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:02,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:02,821 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:02,821 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:02,821 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:02,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:02,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:02,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:03,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:03,134 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:03,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:03,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1454969611, now seen corresponding path program 1 times [2021-06-14 15:25:03,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:03,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971143322] [2021-06-14 15:25:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 15:25:03,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:03,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971143322] [2021-06-14 15:25:03,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971143322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:03,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770528142] [2021-06-14 15:25:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:03,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 15:25:03,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:25:03,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770528142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:03,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:03,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2021-06-14 15:25:03,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810288253] [2021-06-14 15:25:03,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-14 15:25:03,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:03,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-14 15:25:03,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-14 15:25:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:03,312 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:03,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:03,313 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:03,313 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:03,313 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:03,313 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:03,589 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-14 15:25:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:03,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:03,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:03,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-14 15:25:03,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-14 15:25:03,829 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:03,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1506875694, now seen corresponding path program 1 times [2021-06-14 15:25:03,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:03,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063302555] [2021-06-14 15:25:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 15:25:03,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:03,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063302555] [2021-06-14 15:25:03,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063302555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:03,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740687879] [2021-06-14 15:25:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:03,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-14 15:25:03,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:25:04,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740687879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:04,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:04,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12] total 18 [2021-06-14 15:25:04,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150403203] [2021-06-14 15:25:04,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-14 15:25:04,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:04,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-14 15:25:04,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-14 15:25:04,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:04,094 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:04,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:04,094 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:04,094 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:04,094 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:04,094 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 18 states. [2021-06-14 15:25:04,094 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:25:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-14 15:25:04,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:04,701 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1508591749, now seen corresponding path program 1 times [2021-06-14 15:25:04,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:04,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166123203] [2021-06-14 15:25:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-14 15:25:04,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:04,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166123203] [2021-06-14 15:25:04,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166123203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:04,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510868029] [2021-06-14 15:25:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:04,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-14 15:25:04,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:25:04,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510868029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:04,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:04,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 22 [2021-06-14 15:25:04,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345683745] [2021-06-14 15:25:04,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-14 15:25:04,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:04,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-14 15:25:04,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-14 15:25:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:04,992 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:04,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:04,992 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:04,992 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:04,992 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:04,992 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:25:04,993 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 21 states. [2021-06-14 15:25:04,993 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:25:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-14 15:25:05,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-14 15:25:05,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-14 15:25:05,497 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:05,498 INFO L82 PathProgramCache]: Analyzing trace with hash 942067354, now seen corresponding path program 1 times [2021-06-14 15:25:05,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:05,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828950057] [2021-06-14 15:25:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:25:05,501 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:25:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:25:05,504 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:25:05,507 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:25:05,507 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:25:05,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-14 15:25:05,515 INFO L301 ceAbstractionStarter]: Result for error location threadThread5of7ForFork0 was UNSAFE (1/9) [2021-06-14 15:25:05,515 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:25:05,519 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:25:05,519 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:25:05,519 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:25:05,519 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:25:05,519 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:25:05,519 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:25:05,519 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:25:05,519 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread1of7ForFork0======== [2021-06-14 15:25:05,603 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:05,603 INFO L82 PathProgramCache]: Analyzing trace with hash -480059540, now seen corresponding path program 1 times [2021-06-14 15:25:05,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:05,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875672888] [2021-06-14 15:25:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:25:05,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:05,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875672888] [2021-06-14 15:25:05,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875672888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:05,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368559549] [2021-06-14 15:25:05,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:05,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 15:25:05,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:25:05,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368559549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:05,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:05,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-14 15:25:05,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109486949] [2021-06-14 15:25:05,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-14 15:25:05,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:05,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-14 15:25:05,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-14 15:25:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:05,676 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:05,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:05,676 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:08,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:08,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-14 15:25:08,822 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:08,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1634953195, now seen corresponding path program 1 times [2021-06-14 15:25:08,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:08,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893981486] [2021-06-14 15:25:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 15:25:08,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:08,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893981486] [2021-06-14 15:25:08,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893981486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:08,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464489842] [2021-06-14 15:25:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:08,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:25:08,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:25:08,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464489842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:08,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:08,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:25:08,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884272167] [2021-06-14 15:25:08,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:25:08,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:08,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:25:08,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:25:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:08,954 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:08,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:08,954 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:08,954 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:12,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:12,249 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:12,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1659681712, now seen corresponding path program 1 times [2021-06-14 15:25:12,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:12,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505751458] [2021-06-14 15:25:12,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:25:12,252 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:25:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:25:12,253 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:25:12,254 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:25:12,254 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:25:12,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-06-14 15:25:12,255 INFO L301 ceAbstractionStarter]: Result for error location threadThread1of7ForFork0 was UNSAFE (2/9) [2021-06-14 15:25:12,255 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:25:12,258 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:25:12,258 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:25:12,258 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:25:12,258 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:25:12,258 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:25:12,258 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:25:12,258 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:25:12,258 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread7of7ForFork0======== [2021-06-14 15:25:12,357 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:12,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1458471413, now seen corresponding path program 1 times [2021-06-14 15:25:12,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:12,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385868324] [2021-06-14 15:25:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-14 15:25:12,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:12,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385868324] [2021-06-14 15:25:12,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385868324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:12,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424220677] [2021-06-14 15:25:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:12,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 15:25:12,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 15:25:12,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424220677] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:25:12,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-14 15:25:12,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-06-14 15:25:12,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097839029] [2021-06-14 15:25:12,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:25:12,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:12,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:25:12,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-14 15:25:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:12,470 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:12,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:12,470 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:12,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-14 15:25:12,720 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:12,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:12,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1161691802, now seen corresponding path program 1 times [2021-06-14 15:25:12,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:12,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065439627] [2021-06-14 15:25:12,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-14 15:25:12,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:12,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065439627] [2021-06-14 15:25:12,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065439627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:12,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376956138] [2021-06-14 15:25:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:12,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:25:12,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 15:25:12,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376956138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:12,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:12,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:25:12,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055445781] [2021-06-14 15:25:12,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:25:12,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:12,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:25:12,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:25:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:12,837 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:12,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:12,837 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:12,837 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:13,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-14 15:25:13,178 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:13,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:13,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1981866339, now seen corresponding path program 1 times [2021-06-14 15:25:13,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:13,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140883707] [2021-06-14 15:25:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-14 15:25:13,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:13,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140883707] [2021-06-14 15:25:13,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140883707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:13,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791614333] [2021-06-14 15:25:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:13,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:25:13,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 15:25:13,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791614333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:13,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:13,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:25:13,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817217608] [2021-06-14 15:25:13,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:25:13,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:13,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:25:13,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:25:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:13,341 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:13,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:13,341 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:13,341 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:13,341 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:13,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:13,716 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:13,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:13,716 INFO L82 PathProgramCache]: Analyzing trace with hash 639527314, now seen corresponding path program 1 times [2021-06-14 15:25:13,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:13,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566349786] [2021-06-14 15:25:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-14 15:25:13,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:13,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566349786] [2021-06-14 15:25:13,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566349786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:13,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865329797] [2021-06-14 15:25:13,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:13,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 15:25:13,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 15:25:14,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865329797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:14,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:14,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2021-06-14 15:25:14,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136318359] [2021-06-14 15:25:14,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-14 15:25:14,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:14,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-14 15:25:14,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-14 15:25:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:14,010 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:14,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:14,010 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:14,010 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:14,010 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:14,010 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:25:14,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:14,397 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash -649886119, now seen corresponding path program 1 times [2021-06-14 15:25:14,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:14,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815875161] [2021-06-14 15:25:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-14 15:25:14,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:14,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815875161] [2021-06-14 15:25:14,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815875161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:14,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338559052] [2021-06-14 15:25:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:14,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-14 15:25:14,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:25:14,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338559052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:14,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:14,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-06-14 15:25:14,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702391907] [2021-06-14 15:25:14,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-14 15:25:14,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:14,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-14 15:25:14,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-14 15:25:14,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:14,603 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:14,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:14,603 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:14,603 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:14,603 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:14,603 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:25:14,603 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:25:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-14 15:25:15,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:15,034 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:15,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:15,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1989793982, now seen corresponding path program 1 times [2021-06-14 15:25:15,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:15,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109601248] [2021-06-14 15:25:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-06-14 15:25:15,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:15,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109601248] [2021-06-14 15:25:15,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109601248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:15,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631273732] [2021-06-14 15:25:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:15,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-14 15:25:15,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:15,261 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:25:15,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631273732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:15,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:15,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15] total 21 [2021-06-14 15:25:15,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713359481] [2021-06-14 15:25:15,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-14 15:25:15,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:15,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-14 15:25:15,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-14 15:25:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:15,262 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:15,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:15,262 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:15,262 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:15,262 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:15,262 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:25:15,262 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 21 states. [2021-06-14 15:25:15,262 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:25:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-14 15:25:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-14 15:25:15,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-14 15:25:15,693 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:25:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:25:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1090300221, now seen corresponding path program 1 times [2021-06-14 15:25:15,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:25:15,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393544869] [2021-06-14 15:25:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:25:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 15:25:15,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:25:15,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393544869] [2021-06-14 15:25:15,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393544869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:15,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795695818] [2021-06-14 15:25:15,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:25:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:25:15,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-14 15:25:15,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:25:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:25:15,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795695818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:25:15,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:25:15,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 22 [2021-06-14 15:25:15,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624952045] [2021-06-14 15:25:15,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-14 15:25:15,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:25:15,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-14 15:25:15,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-14 15:25:15,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:25:15,925 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:25:15,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:25:15,925 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:25:15,925 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:25:15,925 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:25:15,925 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:25:15,926 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 21 states. [2021-06-14 15:25:15,926 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 22 states. [2021-06-14 15:25:15,926 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:05,147 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 7 [2021-06-14 15:27:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:27:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-14 15:27:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-14 15:27:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-14 15:27:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-14 15:27:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-14 15:27:12,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:12,124 INFO L301 ceAbstractionStarter]: Result for error location threadThread7of7ForFork0 was SAFE (3/9) [2021-06-14 15:27:12,124 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:27:12,131 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:27:12,131 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:27:12,131 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:27:12,131 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:27:12,131 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:27:12,131 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:27:12,132 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:27:12,132 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread3of7ForFork0======== [2021-06-14 15:27:12,208 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:27:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:27:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash 372889963, now seen corresponding path program 1 times [2021-06-14 15:27:12,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:27:12,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493267395] [2021-06-14 15:27:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:27:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:27:12,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:27:12,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493267395] [2021-06-14 15:27:12,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493267395] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:27:12,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:27:12,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:27:12,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617101869] [2021-06-14 15:27:12,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:27:12,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:27:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:27:12,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:27:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:12,223 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:27:12,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:27:12,223 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:12,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:12,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-06-14 15:27:12,251 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:27:12,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:27:12,251 INFO L82 PathProgramCache]: Analyzing trace with hash 296507100, now seen corresponding path program 1 times [2021-06-14 15:27:12,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:27:12,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590356406] [2021-06-14 15:27:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:27:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 15:27:12,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:27:12,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590356406] [2021-06-14 15:27:12,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590356406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:12,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761525589] [2021-06-14 15:27:12,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-14 15:27:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:12,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:27:12,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:27:12,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761525589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:12,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:27:12,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:27:12,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848036566] [2021-06-14 15:27:12,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:27:12,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:27:12,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:27:12,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:27:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:12,367 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:27:12,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:27:12,367 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:12,367 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:12,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:12,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-14 15:27:12,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:12,660 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:27:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:27:12,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1405408473, now seen corresponding path program 1 times [2021-06-14 15:27:12,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:27:12,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581932112] [2021-06-14 15:27:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:27:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:27:12,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:27:12,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581932112] [2021-06-14 15:27:12,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581932112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:12,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978549002] [2021-06-14 15:27:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:12,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:27:12,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:27:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:27:12,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978549002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:12,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:27:12,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2021-06-14 15:27:12,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253476779] [2021-06-14 15:27:12,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:27:12,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:27:12,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:27:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:27:12,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:12,781 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:27:12,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:27:12,781 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:12,781 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 13 states. [2021-06-14 15:27:12,781 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:27:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:27:13,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-14 15:27:13,164 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:27:13,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:27:13,164 INFO L82 PathProgramCache]: Analyzing trace with hash -113998824, now seen corresponding path program 1 times [2021-06-14 15:27:13,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:27:13,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445203962] [2021-06-14 15:27:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:27:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-14 15:27:13,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:27:13,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445203962] [2021-06-14 15:27:13,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445203962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:13,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039289133] [2021-06-14 15:27:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:13,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 15:27:13,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:27:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:27:13,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039289133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:13,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:27:13,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 15 [2021-06-14 15:27:13,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831839342] [2021-06-14 15:27:13,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-14 15:27:13,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:27:13,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-14 15:27:13,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-14 15:27:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:13,305 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:27:13,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:27:13,305 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:13,305 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:27:13,305 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:27:13,305 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:27:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:27:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-14 15:27:13,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:13,631 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:27:13,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:27:13,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1394710013, now seen corresponding path program 1 times [2021-06-14 15:27:13,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:27:13,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331923366] [2021-06-14 15:27:13,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:27:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:27:13,634 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:27:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:27:13,637 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:27:13,638 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:27:13,638 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:27:13,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-06-14 15:27:13,639 INFO L301 ceAbstractionStarter]: Result for error location threadThread3of7ForFork0 was UNSAFE (4/9) [2021-06-14 15:27:13,639 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:27:13,642 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:27:13,643 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:27:13,643 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:27:13,643 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:27:13,643 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:27:13,643 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:27:13,643 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:27:13,643 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread6of7ForFork0======== [2021-06-14 15:27:13,734 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:27:13,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:27:13,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1027939407, now seen corresponding path program 1 times [2021-06-14 15:27:13,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:27:13,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172075337] [2021-06-14 15:27:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:27:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 15:27:13,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:27:13,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172075337] [2021-06-14 15:27:13,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172075337] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:27:13,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:27:13,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:27:13,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262634313] [2021-06-14 15:27:13,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:27:13,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:27:13,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:27:13,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:27:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:13,753 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:27:13,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:27:13,753 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:13,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:13,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-06-14 15:27:13,799 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:27:13,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:27:13,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1697628066, now seen corresponding path program 1 times [2021-06-14 15:27:13,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:27:13,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400211783] [2021-06-14 15:27:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:27:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-06-14 15:27:13,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:27:13,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400211783] [2021-06-14 15:27:13,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400211783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:13,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113843637] [2021-06-14 15:27:13,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:13,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:27:13,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:27:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 15:27:13,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113843637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:13,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:27:13,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:27:13,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286611936] [2021-06-14 15:27:13,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:27:13,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:27:13,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:27:13,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:27:13,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:13,922 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:27:13,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:27:13,922 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:13,922 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:27:14,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:14,241 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:27:14,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:27:14,241 INFO L82 PathProgramCache]: Analyzing trace with hash -185456097, now seen corresponding path program 1 times [2021-06-14 15:27:14,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:27:14,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315293848] [2021-06-14 15:27:14,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:27:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-14 15:27:14,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:27:14,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315293848] [2021-06-14 15:27:14,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315293848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:14,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332938172] [2021-06-14 15:27:14,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:14,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:27:14,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:27:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 15:27:14,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332938172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:14,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:27:14,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:27:14,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104047446] [2021-06-14 15:27:14,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:27:14,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:27:14,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:27:14,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:27:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:14,372 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:27:14,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:27:14,372 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:14,372 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:27:14,372 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:27:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:27:14,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:14,714 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:27:14,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:27:14,714 INFO L82 PathProgramCache]: Analyzing trace with hash 161554894, now seen corresponding path program 1 times [2021-06-14 15:27:14,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:27:14,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893899077] [2021-06-14 15:27:14,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:27:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-14 15:27:14,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:27:14,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893899077] [2021-06-14 15:27:14,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893899077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:14,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966648184] [2021-06-14 15:27:14,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:14,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 15:27:14,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:27:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:27:14,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966648184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:14,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:27:14,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2021-06-14 15:27:14,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782928904] [2021-06-14 15:27:14,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-14 15:27:14,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:27:14,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-14 15:27:14,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-14 15:27:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:14,863 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:27:14,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:27:14,863 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:14,863 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:27:14,863 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:27:14,863 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:27:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:27:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:27:15,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:15,240 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:27:15,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:27:15,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1055504917, now seen corresponding path program 1 times [2021-06-14 15:27:15,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:27:15,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631585240] [2021-06-14 15:27:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:27:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-14 15:27:15,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:27:15,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631585240] [2021-06-14 15:27:15,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631585240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:15,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463562473] [2021-06-14 15:27:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:15,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:15,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-14 15:27:15,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:27:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:27:15,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463562473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:15,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:27:15,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-06-14 15:27:15,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334707314] [2021-06-14 15:27:15,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-14 15:27:15,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:27:15,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-14 15:27:15,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-14 15:27:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:15,415 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:27:15,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:27:15,415 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:15,415 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:27:15,415 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:27:15,415 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:27:15,415 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:27:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:27:15,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:27:15,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-14 15:27:15,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:15,798 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:27:15,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:27:15,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1605683330, now seen corresponding path program 1 times [2021-06-14 15:27:15,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:27:15,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427947095] [2021-06-14 15:27:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:27:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 15:27:15,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:27:15,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427947095] [2021-06-14 15:27:15,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427947095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:15,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647151272] [2021-06-14 15:27:15,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:27:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:27:15,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-14 15:27:15,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:27:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:27:16,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647151272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:27:16,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:27:16,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14] total 20 [2021-06-14 15:27:16,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879133665] [2021-06-14 15:27:16,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-14 15:27:16,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:27:16,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-14 15:27:16,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-14 15:27:16,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:27:16,014 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:27:16,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:27:16,014 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:27:16,015 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:27:16,015 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:27:16,015 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:27:16,015 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 20 states. [2021-06-14 15:27:16,015 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-14 15:30:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-14 15:30:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-14 15:30:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-14 15:30:43,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:43,084 INFO L301 ceAbstractionStarter]: Result for error location threadThread6of7ForFork0 was SAFE (5/9) [2021-06-14 15:30:43,085 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:30:43,089 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:30:43,089 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:30:43,089 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:30:43,089 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:30:43,089 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:30:43,089 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:30:43,089 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:30:43,089 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread4of7ForFork0======== [2021-06-14 15:30:43,168 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:43,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:43,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1855796908, now seen corresponding path program 1 times [2021-06-14 15:30:43,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:43,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425159411] [2021-06-14 15:30:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 15:30:43,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:43,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425159411] [2021-06-14 15:30:43,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425159411] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:30:43,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:30:43,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:30:43,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41620210] [2021-06-14 15:30:43,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:30:43,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:30:43,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:30:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:43,185 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:43,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:43,185 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:43,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:43,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-06-14 15:30:43,223 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:43,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:43,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1220645789, now seen corresponding path program 1 times [2021-06-14 15:30:43,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:43,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146796907] [2021-06-14 15:30:43,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 15:30:43,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:43,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146796907] [2021-06-14 15:30:43,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146796907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:43,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271686207] [2021-06-14 15:30:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:30:43,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:30:43,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271686207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:43,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:43,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:30:43,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026647295] [2021-06-14 15:30:43,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:30:43,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:43,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:30:43,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:30:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:43,342 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:43,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:43,343 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:43,343 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:43,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:43,637 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:43,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1371485414, now seen corresponding path program 1 times [2021-06-14 15:30:43,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:43,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897556797] [2021-06-14 15:30:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 15:30:43,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:43,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897556797] [2021-06-14 15:30:43,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897556797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:43,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917210472] [2021-06-14 15:30:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:43,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:30:43,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:30:43,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917210472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:43,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:43,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:30:43,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643615172] [2021-06-14 15:30:43,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:30:43,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:43,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:30:43,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:30:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:43,833 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:43,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:43,834 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:43,834 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:43,834 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:43,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:43,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:43,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-14 15:30:44,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-14 15:30:44,144 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:44,144 INFO L82 PathProgramCache]: Analyzing trace with hash 865984969, now seen corresponding path program 1 times [2021-06-14 15:30:44,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:44,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865306261] [2021-06-14 15:30:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:30:44,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:44,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865306261] [2021-06-14 15:30:44,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865306261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:44,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868130366] [2021-06-14 15:30:44,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:44,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 15:30:44,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:30:44,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868130366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:44,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:44,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 16 [2021-06-14 15:30:44,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039839499] [2021-06-14 15:30:44,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-14 15:30:44,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:44,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-14 15:30:44,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-14 15:30:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:44,434 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:44,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:44,434 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:44,434 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:44,434 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 15 states. [2021-06-14 15:30:44,434 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:30:44,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:44,917 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:44,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1170451994, now seen corresponding path program 1 times [2021-06-14 15:30:44,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:44,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139447853] [2021-06-14 15:30:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-14 15:30:44,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:44,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139447853] [2021-06-14 15:30:44,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139447853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:44,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781429339] [2021-06-14 15:30:44,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:44,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-14 15:30:44,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:30:45,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781429339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:45,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:45,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 20 [2021-06-14 15:30:45,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894314837] [2021-06-14 15:30:45,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-14 15:30:45,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:45,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-14 15:30:45,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-14 15:30:45,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:45,110 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:45,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:45,111 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:45,111 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:45,111 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:45,111 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:30:45,111 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:30:45,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-14 15:30:45,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-14 15:30:45,548 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:45,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1957675937, now seen corresponding path program 1 times [2021-06-14 15:30:45,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:45,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637197977] [2021-06-14 15:30:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:30:45,551 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:30:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:30:45,552 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:30:45,554 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:30:45,554 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:30:45,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-06-14 15:30:45,554 INFO L301 ceAbstractionStarter]: Result for error location threadThread4of7ForFork0 was UNSAFE (6/9) [2021-06-14 15:30:45,555 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 15:30:45,561 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:30:45,562 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:30:45,562 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:30:45,562 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:30:45,562 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:30:45,562 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:30:45,562 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:30:45,562 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread2of7ForFork0======== Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:30:45,646 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash 755238827, now seen corresponding path program 1 times [2021-06-14 15:30:45,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:45,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801232552] [2021-06-14 15:30:45,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:30:45,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:45,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801232552] [2021-06-14 15:30:45,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801232552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:45,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237686077] [2021-06-14 15:30:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:45,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 15:30:45,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:30:45,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237686077] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:30:45,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-14 15:30:45,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-06-14 15:30:45,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270421040] [2021-06-14 15:30:45,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:30:45,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:45,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:30:45,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-14 15:30:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:45,721 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:45,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:45,721 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:45,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:45,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:45,941 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:45,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2098666084, now seen corresponding path program 1 times [2021-06-14 15:30:45,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:45,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256393783] [2021-06-14 15:30:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:30:45,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:45,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256393783] [2021-06-14 15:30:45,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256393783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:45,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057718930] [2021-06-14 15:30:45,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:30:46,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:30:46,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057718930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:46,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:46,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-14 15:30:46,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21509040] [2021-06-14 15:30:46,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:30:46,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:46,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:30:46,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:30:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:46,050 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:46,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:46,050 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:46,050 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:46,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:46,359 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:46,359 INFO L82 PathProgramCache]: Analyzing trace with hash -983138849, now seen corresponding path program 1 times [2021-06-14 15:30:46,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:46,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470931792] [2021-06-14 15:30:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 15:30:46,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:46,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470931792] [2021-06-14 15:30:46,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470931792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:46,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082372511] [2021-06-14 15:30:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:46,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:30:46,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:30:46,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082372511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:46,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:46,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:30:46,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823329670] [2021-06-14 15:30:46,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:30:46,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:46,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:30:46,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:30:46,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:46,473 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:46,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:46,473 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:46,473 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:46,473 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-14 15:30:46,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:46,769 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:46,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:46,770 INFO L82 PathProgramCache]: Analyzing trace with hash 19826476, now seen corresponding path program 1 times [2021-06-14 15:30:46,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:46,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598604638] [2021-06-14 15:30:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:30:46,772 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:30:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:30:46,773 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:30:46,773 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:30:46,774 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:30:46,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-06-14 15:30:46,774 INFO L301 ceAbstractionStarter]: Result for error location threadThread2of7ForFork0 was UNSAFE (7/9) [2021-06-14 15:30:46,774 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:30:46,778 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:30:46,778 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:30:46,778 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:30:46,778 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:30:46,778 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:30:46,778 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:30:46,778 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:30:46,778 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 15:30:46,867 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:30:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:46,867 INFO L82 PathProgramCache]: Analyzing trace with hash 14925496, now seen corresponding path program 1 times [2021-06-14 15:30:46,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:46,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326181827] [2021-06-14 15:30:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 15:30:46,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:46,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326181827] [2021-06-14 15:30:46,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326181827] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:30:46,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:30:46,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:30:46,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934391743] [2021-06-14 15:30:46,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:30:46,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:46,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:30:46,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:30:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:46,881 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:46,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:46,881 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:46,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-06-14 15:30:46,930 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:30:46,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:46,930 INFO L82 PathProgramCache]: Analyzing trace with hash -644783511, now seen corresponding path program 1 times [2021-06-14 15:30:46,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:46,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305746199] [2021-06-14 15:30:46,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-14 15:30:46,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:46,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305746199] [2021-06-14 15:30:46,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305746199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:46,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589448969] [2021-06-14 15:30:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:46,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:30:46,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 15:30:47,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589448969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:47,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:47,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:30:47,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236802666] [2021-06-14 15:30:47,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:30:47,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:47,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:30:47,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:30:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:47,039 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:47,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:47,039 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:47,039 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:47,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:47,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:47,365 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:30:47,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:47,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2107432538, now seen corresponding path program 1 times [2021-06-14 15:30:47,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:47,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090225080] [2021-06-14 15:30:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-14 15:30:47,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:47,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090225080] [2021-06-14 15:30:47,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090225080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:47,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077086431] [2021-06-14 15:30:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:47,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:30:47,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 15:30:47,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077086431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:47,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:47,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:30:47,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369303515] [2021-06-14 15:30:47,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:30:47,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:47,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:30:47,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:30:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:47,535 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:47,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:47,535 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:47,535 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:47,535 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:47,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:47,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:47,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:47,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-14 15:30:47,875 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:30:47,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:47,875 INFO L82 PathProgramCache]: Analyzing trace with hash 657648021, now seen corresponding path program 1 times [2021-06-14 15:30:47,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:47,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401873439] [2021-06-14 15:30:47,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-14 15:30:47,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:47,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401873439] [2021-06-14 15:30:47,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401873439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:47,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691539604] [2021-06-14 15:30:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:47,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 15:30:47,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 15:30:48,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691539604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:48,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:48,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2021-06-14 15:30:48,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748324551] [2021-06-14 15:30:48,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-14 15:30:48,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:48,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-14 15:30:48,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-14 15:30:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:48,040 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:48,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:48,040 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:48,040 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:48,040 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:48,040 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:30:48,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:48,414 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:30:48,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:48,414 INFO L82 PathProgramCache]: Analyzing trace with hash 750160924, now seen corresponding path program 1 times [2021-06-14 15:30:48,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:48,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951091398] [2021-06-14 15:30:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-14 15:30:48,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:48,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951091398] [2021-06-14 15:30:48,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951091398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:48,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110473193] [2021-06-14 15:30:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:48,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-14 15:30:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:30:48,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110473193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:48,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:48,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-06-14 15:30:48,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610939379] [2021-06-14 15:30:48,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-14 15:30:48,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:48,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-14 15:30:48,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-14 15:30:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:48,594 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:48,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:48,594 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:48,594 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:48,595 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:48,595 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:30:48,595 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:48,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:48,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:48,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:48,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:30:48,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-14 15:30:49,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:49,121 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:30:49,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:49,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1146203323, now seen corresponding path program 1 times [2021-06-14 15:30:49,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:49,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223008910] [2021-06-14 15:30:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-06-14 15:30:49,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:49,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223008910] [2021-06-14 15:30:49,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223008910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:49,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860699251] [2021-06-14 15:30:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:49,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-14 15:30:49,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:30:49,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860699251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:49,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:49,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15] total 21 [2021-06-14 15:30:49,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282076034] [2021-06-14 15:30:49,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-14 15:30:49,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:49,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-14 15:30:49,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-14 15:30:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:49,406 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:49,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:49,406 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:49,406 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:49,406 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:49,406 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:30:49,407 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 21 states. [2021-06-14 15:30:49,407 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:30:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-14 15:30:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-14 15:30:49,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-14 15:30:49,886 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 15:30:49,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:49,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1172082938, now seen corresponding path program 1 times [2021-06-14 15:30:49,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:49,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060300735] [2021-06-14 15:30:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:30:49,890 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:30:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:30:49,909 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:30:49,910 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:30:49,910 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:30:49,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-06-14 15:30:49,911 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (8/9) [2021-06-14 15:30:49,911 WARN L243 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 15:30:49,911 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2021-06-14 15:30:49,923 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,923 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,923 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,923 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,924 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,924 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,924 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,924 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,924 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,924 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,924 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,924 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,924 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,924 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,924 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,924 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,929 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,929 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,930 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,930 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,931 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,931 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,931 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,931 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,931 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,931 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,931 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,931 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,932 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,932 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,932 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,932 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 15:30:49,948 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 15:30:49,949 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:30:50,017 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:30:50,017 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:30:50,017 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:30:50,018 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:30:50,018 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:30:50,018 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:30:50,018 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:30:50,018 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread4of8ForFork0======== [2021-06-14 15:30:50,182 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:50,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:50,182 INFO L82 PathProgramCache]: Analyzing trace with hash 145273673, now seen corresponding path program 1 times [2021-06-14 15:30:50,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:50,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75707509] [2021-06-14 15:30:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 15:30:50,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:50,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75707509] [2021-06-14 15:30:50,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75707509] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:30:50,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:30:50,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:30:50,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165918034] [2021-06-14 15:30:50,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:30:50,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:50,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:30:50,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:30:50,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:50,210 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:50,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:50,210 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:50,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-06-14 15:30:50,238 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:50,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:50,238 INFO L82 PathProgramCache]: Analyzing trace with hash -265861407, now seen corresponding path program 1 times [2021-06-14 15:30:50,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:50,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89765072] [2021-06-14 15:30:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 15:30:50,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:50,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89765072] [2021-06-14 15:30:50,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89765072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:50,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854956130] [2021-06-14 15:30:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:50,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:30:50,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:30:50,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854956130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:50,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:50,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:30:50,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129677891] [2021-06-14 15:30:50,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:30:50,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:30:50,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:30:50,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:50,351 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:50,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:50,351 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:50,351 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:50,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:50,681 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:50,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:50,681 INFO L82 PathProgramCache]: Analyzing trace with hash -67512421, now seen corresponding path program 1 times [2021-06-14 15:30:50,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:50,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756881325] [2021-06-14 15:30:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 15:30:50,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:50,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756881325] [2021-06-14 15:30:50,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756881325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:50,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779264259] [2021-06-14 15:30:50,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:50,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:30:50,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:30:50,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779264259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:50,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:50,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:30:50,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719778386] [2021-06-14 15:30:50,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:30:50,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:50,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:30:50,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:30:50,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:50,815 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:50,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:50,815 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:50,815 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:50,815 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-14 15:30:51,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-14 15:30:51,117 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:51,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2000361691, now seen corresponding path program 1 times [2021-06-14 15:30:51,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:51,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515295821] [2021-06-14 15:30:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:30:51,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:51,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515295821] [2021-06-14 15:30:51,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515295821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:51,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645954887] [2021-06-14 15:30:51,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:51,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 15:30:51,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:30:51,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645954887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:51,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:51,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 16 [2021-06-14 15:30:51,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681237450] [2021-06-14 15:30:51,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-14 15:30:51,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:51,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-14 15:30:51,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-14 15:30:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:51,323 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:51,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:51,323 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:51,323 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:51,323 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 15 states. [2021-06-14 15:30:51,323 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:51,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:51,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:30:51,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:51,757 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:51,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:51,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1342837749, now seen corresponding path program 1 times [2021-06-14 15:30:51,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:51,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056235694] [2021-06-14 15:30:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-14 15:30:51,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:51,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056235694] [2021-06-14 15:30:51,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056235694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:51,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576325235] [2021-06-14 15:30:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:51,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-14 15:30:51,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:30:51,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576325235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:51,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:51,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 20 [2021-06-14 15:30:51,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859107063] [2021-06-14 15:30:51,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-14 15:30:51,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:51,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-14 15:30:51,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-14 15:30:51,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:51,971 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:51,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:51,971 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:51,971 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:51,971 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:51,971 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:30:51,971 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:52,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:52,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:52,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:30:52,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-14 15:30:52,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-14 15:30:52,403 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:52,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1816858937, now seen corresponding path program 1 times [2021-06-14 15:30:52,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:52,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775836403] [2021-06-14 15:30:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:30:52,406 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:30:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:30:52,407 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:30:52,408 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:30:52,408 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:30:52,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-06-14 15:30:52,409 INFO L301 ceAbstractionStarter]: Result for error location threadThread4of8ForFork0 was UNSAFE (1/10) [2021-06-14 15:30:52,409 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 15:30:52,463 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:30:52,463 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:30:52,463 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:30:52,463 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:30:52,463 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:30:52,463 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:30:52,463 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:30:52,463 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread3of8ForFork0======== Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:30:52,586 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:52,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:52,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1674234308, now seen corresponding path program 1 times [2021-06-14 15:30:52,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:52,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955710710] [2021-06-14 15:30:52,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:30:52,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:52,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955710710] [2021-06-14 15:30:52,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955710710] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:30:52,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 15:30:52,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 15:30:52,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095822160] [2021-06-14 15:30:52,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:30:52,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:52,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:30:52,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 15:30:52,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:52,626 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:52,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:52,626 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:52,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:52,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-06-14 15:30:52,653 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:52,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:52,653 INFO L82 PathProgramCache]: Analyzing trace with hash -233641636, now seen corresponding path program 1 times [2021-06-14 15:30:52,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:52,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221450743] [2021-06-14 15:30:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 15:30:52,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:52,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221450743] [2021-06-14 15:30:52,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221450743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:52,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413125716] [2021-06-14 15:30:52,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:52,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:30:52,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:30:52,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413125716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:52,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:52,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:30:52,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063011555] [2021-06-14 15:30:52,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:30:52,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:52,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:30:52,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:30:52,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:52,774 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:52,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:52,774 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:52,774 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-14 15:30:53,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:53,065 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:53,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1810818838, now seen corresponding path program 1 times [2021-06-14 15:30:53,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:53,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55731041] [2021-06-14 15:30:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:30:53,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:53,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55731041] [2021-06-14 15:30:53,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55731041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:53,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346122993] [2021-06-14 15:30:53,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:53,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:30:53,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:30:53,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346122993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:53,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:53,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2021-06-14 15:30:53,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461820650] [2021-06-14 15:30:53,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:30:53,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:53,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:30:53,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:30:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:53,305 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:53,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:53,305 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:53,305 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 13 states. [2021-06-14 15:30:53,305 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:53,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-06-14 15:30:53,689 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:53,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:53,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1149662340, now seen corresponding path program 1 times [2021-06-14 15:30:53,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:53,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449458162] [2021-06-14 15:30:53,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-14 15:30:53,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:53,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449458162] [2021-06-14 15:30:53,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449458162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:53,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415978606] [2021-06-14 15:30:53,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:53,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 15:30:53,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:30:53,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415978606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:53,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:53,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 15 [2021-06-14 15:30:53,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29202655] [2021-06-14 15:30:53,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-14 15:30:53,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:53,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-14 15:30:53,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-14 15:30:53,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:53,967 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:53,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:53,967 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:53,968 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:53,969 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:53,969 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:30:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:30:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:30:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-14 15:30:54,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-14 15:30:54,356 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:54,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:54,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1329511766, now seen corresponding path program 1 times [2021-06-14 15:30:54,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:54,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995172194] [2021-06-14 15:30:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:30:54,361 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:30:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:30:54,376 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:30:54,377 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:30:54,377 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:30:54,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-06-14 15:30:54,378 INFO L301 ceAbstractionStarter]: Result for error location threadThread3of8ForFork0 was UNSAFE (2/10) [2021-06-14 15:30:54,387 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 15:30:54,425 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:30:54,426 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:30:54,426 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:30:54,426 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:30:54,426 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:30:54,426 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:30:54,426 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:30:54,426 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread1of8ForFork0======== Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:30:54,540 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:30:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:30:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2137850173, now seen corresponding path program 1 times [2021-06-14 15:30:54,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:30:54,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820687267] [2021-06-14 15:30:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:30:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:30:54,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:30:54,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820687267] [2021-06-14 15:30:54,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820687267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:54,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030695880] [2021-06-14 15:30:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:30:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:30:54,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 15:30:54,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:30:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:30:54,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030695880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:30:54,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:30:54,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-14 15:30:54,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188233669] [2021-06-14 15:30:54,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-14 15:30:54,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:30:54,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-14 15:30:54,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-14 15:30:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:30:54,658 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:30:54,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:30:54,658 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:10,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:11,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-14 15:31:11,147 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:31:11,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:31:11,148 INFO L82 PathProgramCache]: Analyzing trace with hash 833850241, now seen corresponding path program 1 times [2021-06-14 15:31:11,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:31:11,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277673174] [2021-06-14 15:31:11,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:31:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 15:31:11,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:31:11,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277673174] [2021-06-14 15:31:11,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277673174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:11,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563971131] [2021-06-14 15:31:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:31:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:11,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:31:11,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:31:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:31:11,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563971131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:11,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:31:11,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:31:11,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587887215] [2021-06-14 15:31:11,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:31:11,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:31:11,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:31:11,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:31:11,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:11,248 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:31:11,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:31:11,248 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:11,248 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:26,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:26,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:31:27,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-14 15:31:27,097 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:31:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:31:27,097 INFO L82 PathProgramCache]: Analyzing trace with hash 543328537, now seen corresponding path program 1 times [2021-06-14 15:31:27,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:31:27,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106028630] [2021-06-14 15:31:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:31:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:31:27,099 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:31:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 15:31:27,100 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 15:31:27,100 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 15:31:27,100 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 15:31:27,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-06-14 15:31:27,101 INFO L301 ceAbstractionStarter]: Result for error location threadThread1of8ForFork0 was UNSAFE (3/10) [2021-06-14 15:31:27,101 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 15:31:27,105 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 15:31:27,105 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 15:31:27,105 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 15:31:27,105 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 15:31:27,105 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 15:31:27,105 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 15:31:27,105 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 15:31:27,105 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread7of8ForFork0======== [2021-06-14 15:31:27,237 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:31:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:31:27,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1889622750, now seen corresponding path program 1 times [2021-06-14 15:31:27,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:31:27,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662310843] [2021-06-14 15:31:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:31:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-14 15:31:27,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:31:27,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662310843] [2021-06-14 15:31:27,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662310843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:27,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771284840] [2021-06-14 15:31:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:31:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:27,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 15:31:27,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:31:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-14 15:31:27,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771284840] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 15:31:27,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-14 15:31:27,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-06-14 15:31:27,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898160131] [2021-06-14 15:31:27,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 15:31:27,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:31:27,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 15:31:27,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-14 15:31:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:27,422 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:31:27,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:31:27,422 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:27,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:31:27,681 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:31:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:31:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash -442021258, now seen corresponding path program 1 times [2021-06-14 15:31:27,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:31:27,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366473267] [2021-06-14 15:31:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:31:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-14 15:31:27,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:31:27,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366473267] [2021-06-14 15:31:27,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366473267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:27,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730358291] [2021-06-14 15:31:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:31:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:27,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 15:31:27,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:31:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 15:31:27,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730358291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:27,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:31:27,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-14 15:31:27,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046026604] [2021-06-14 15:31:27,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 15:31:27,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:31:27,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 15:31:27,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-14 15:31:27,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:27,798 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:31:27,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:31:27,799 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:27,799 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:31:28,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-14 15:31:28,155 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:31:28,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:31:28,155 INFO L82 PathProgramCache]: Analyzing trace with hash -984312784, now seen corresponding path program 1 times [2021-06-14 15:31:28,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:31:28,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341260462] [2021-06-14 15:31:28,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:31:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-14 15:31:28,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:31:28,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341260462] [2021-06-14 15:31:28,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341260462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:28,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960422951] [2021-06-14 15:31:28,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:31:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:28,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 15:31:28,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:31:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 15:31:28,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960422951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:28,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:31:28,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-14 15:31:28,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837306853] [2021-06-14 15:31:28,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-14 15:31:28,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:31:28,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-14 15:31:28,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-14 15:31:28,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:28,495 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:31:28,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:31:28,496 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:28,496 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:31:28,496 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:31:28,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:31:28,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-14 15:31:28,885 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:31:28,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:31:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1180523334, now seen corresponding path program 1 times [2021-06-14 15:31:28,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:31:28,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981515858] [2021-06-14 15:31:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:31:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-14 15:31:28,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:31:28,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981515858] [2021-06-14 15:31:28,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981515858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:28,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015108213] [2021-06-14 15:31:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:31:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:28,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 15:31:28,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:31:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 15:31:29,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015108213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:29,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:31:29,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2021-06-14 15:31:29,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760611879] [2021-06-14 15:31:29,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-14 15:31:29,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:31:29,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-14 15:31:29,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-14 15:31:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:29,052 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:31:29,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:31:29,053 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:29,053 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:31:29,053 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:31:29,053 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:31:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:31:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:31:29,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:31:29,425 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:31:29,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:31:29,426 INFO L82 PathProgramCache]: Analyzing trace with hash 122818698, now seen corresponding path program 1 times [2021-06-14 15:31:29,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:31:29,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807416411] [2021-06-14 15:31:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:31:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-14 15:31:29,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:31:29,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807416411] [2021-06-14 15:31:29,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807416411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:29,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97374431] [2021-06-14 15:31:29,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:31:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:29,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-14 15:31:29,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:31:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-14 15:31:29,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97374431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:29,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:31:29,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-06-14 15:31:29,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624566866] [2021-06-14 15:31:29,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-14 15:31:29,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:31:29,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-14 15:31:29,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-14 15:31:29,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:29,639 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:31:29,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:31:29,639 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:29,639 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:31:29,639 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:31:29,639 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:31:29,639 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:31:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:31:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:31:29,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-14 15:31:30,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:31:30,065 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:31:30,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:31:30,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2060712922, now seen corresponding path program 1 times [2021-06-14 15:31:30,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:31:30,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974236666] [2021-06-14 15:31:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:31:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-06-14 15:31:30,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:31:30,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974236666] [2021-06-14 15:31:30,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974236666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:30,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042627087] [2021-06-14 15:31:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:31:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:30,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-14 15:31:30,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:31:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 15:31:30,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042627087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:30,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:31:30,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15] total 21 [2021-06-14 15:31:30,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603178620] [2021-06-14 15:31:30,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-14 15:31:30,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:31:30,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-14 15:31:30,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-14 15:31:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:30,326 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:31:30,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:31:30,326 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:30,326 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:31:30,326 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:31:30,326 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:31:30,326 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 21 states. [2021-06-14 15:31:30,327 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:31:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:31:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:31:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-14 15:31:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-14 15:31:30,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:31:30,772 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 15:31:30,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 15:31:30,772 INFO L82 PathProgramCache]: Analyzing trace with hash 39569112, now seen corresponding path program 1 times [2021-06-14 15:31:30,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 15:31:30,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113661733] [2021-06-14 15:31:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 15:31:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-14 15:31:30,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 15:31:30,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113661733] [2021-06-14 15:31:30,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113661733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:30,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19414113] [2021-06-14 15:31:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 15:31:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 15:31:30,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-14 15:31:30,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 15:31:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 15:31:31,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19414113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 15:31:31,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 15:31:31,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 22 [2021-06-14 15:31:31,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199917152] [2021-06-14 15:31:31,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-14 15:31:31,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 15:31:31,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-14 15:31:31,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-14 15:31:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 15:31:31,091 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 15:31:31,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 15:31:31,091 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 15:31:31,091 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 15:31:31,092 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 16 states. [2021-06-14 15:31:31,092 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 15:31:31,092 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 21 states. [2021-06-14 15:31:31,092 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 22 states. [2021-06-14 15:31:31,092 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.