/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-NewStatesSleep-NoLbe-Random42.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 03:24:10,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-14 03:24:10,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-14 03:24:10,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-14 03:24:10,637 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-NewStatesSleep-NoLbe-Random42.epf [2021-06-14 03:24:10,663 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-14 03:24:10,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-14 03:24:10,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-14 03:24:10,664 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-14 03:24:10,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-14 03:24:10,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-14 03:24:10,666 INFO L138 SettingsManager]: * Use SBE=true [2021-06-14 03:24:10,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-14 03:24:10,666 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-14 03:24:10,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-14 03:24:10,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-14 03:24:10,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-14 03:24:10,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-14 03:24:10,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-14 03:24:10,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-14 03:24:10,667 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-14 03:24:10,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-14 03:24:10,667 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-14 03:24:10,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-14 03:24:10,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-14 03:24:10,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-14 03:24:10,668 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-14 03:24:10,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-14 03:24:10,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-14 03:24:10,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-14 03:24:10,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-14 03:24:10,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-14 03:24:10,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-14 03:24:10,668 INFO L138 SettingsManager]: * DFS Order used in POR=RANDOM [2021-06-14 03:24:10,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-14 03:24:10,668 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-14 03:24:10,669 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-06-14 03:24:10,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-14 03:24:10,669 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_NEW_STATES [2021-06-14 03:24:10,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-06-14 03:24:10,669 INFO L138 SettingsManager]: * Random seed used by POR DFS order=42 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-14 03:24:10,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-14 03:24:10,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-14 03:24:10,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-14 03:24:10,906 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-14 03:24:10,906 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-14 03:24:10,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl [2021-06-14 03:24:10,907 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl' [2021-06-14 03:24:10,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-14 03:24:10,935 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-14 03:24:10,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-14 03:24:10,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-14 03:24:10,935 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-14 03:24:10,944 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 03:24:10" (1/1) ... [2021-06-14 03:24:10,949 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 03:24:10" (1/1) ... [2021-06-14 03:24:10,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-14 03:24:10,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-14 03:24:10,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-14 03:24:10,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-14 03:24:10,960 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 03:24:10" (1/1) ... [2021-06-14 03:24:10,960 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 03:24:10" (1/1) ... [2021-06-14 03:24:10,961 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 03:24:10" (1/1) ... [2021-06-14 03:24:10,961 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 03:24:10" (1/1) ... [2021-06-14 03:24:10,962 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 03:24:10" (1/1) ... [2021-06-14 03:24:10,964 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 03:24:10" (1/1) ... [2021-06-14 03:24:10,965 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 03:24:10" (1/1) ... [2021-06-14 03:24:10,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-14 03:24:10,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-14 03:24:10,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-14 03:24:10,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-14 03:24:10,969 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 03:24:10" (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 03:24:11,028 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-14 03:24:11,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-14 03:24:11,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-14 03:24:11,028 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-06-14 03:24:11,028 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-06-14 03:24:11,028 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-06-14 03:24:11,029 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 03:24:11,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-14 03:24:11,136 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-14 03:24:11,138 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 03:24:11 BoogieIcfgContainer [2021-06-14 03:24:11,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-14 03:24:11,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-14 03:24:11,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-14 03:24:11,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-14 03:24:11,145 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 03:24:10" (1/2) ... [2021-06-14 03:24:11,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a46cb and model type fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 03:24:11, skipping insertion in model container [2021-06-14 03:24:11,146 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 03:24:11" (2/2) ... [2021-06-14 03:24:11,147 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_unsafe.bpl [2021-06-14 03:24:11,153 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-14 03:24:11,153 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-14 03:24:11,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-14 03:24:11,155 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-14 03:24:11,175 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:11,176 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:11,177 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:11,177 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:11,184 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 03:24:11,204 INFO L255 AbstractCegarLoop]: 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 03:24:11,242 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:11,242 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:11,242 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:11,242 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:11,242 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:11,242 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:11,243 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:11,243 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread1of1ForFork0======== [2021-06-14 03:24:11,258 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:11,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1497746417, now seen corresponding path program 1 times [2021-06-14 03:24:11,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:11,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984205375] [2021-06-14 03:24:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:11,403 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 03:24:11,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:11,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984205375] [2021-06-14 03:24:11,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984205375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:11,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103515147] [2021-06-14 03:24:11,404 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 03:24:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:11,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 03:24:11,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:11,621 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 03:24:11,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103515147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:11,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:11,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-14 03:24:11,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436565610] [2021-06-14 03:24:11,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-14 03:24:11,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:11,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-14 03:24:11,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-14 03:24:11,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:11,644 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:11,646 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 03:24:11,646 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:11,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-06-14 03:24:11,897 INFO L301 ceAbstractionStarter]: Result for error location threadThread1of1ForFork0 was SAFE (1/3) [2021-06-14 03:24:11,898 INFO L255 AbstractCegarLoop]: 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 03:24:11,917 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:11,917 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:11,917 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:11,917 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:11,917 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:11,917 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:11,917 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:11,917 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 03:24:11,919 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:11,919 INFO L82 PathProgramCache]: Analyzing trace with hash 43134170, now seen corresponding path program 1 times [2021-06-14 03:24:11,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:11,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264642493] [2021-06-14 03:24:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:11,922 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:11,924 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 03:24:11,932 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 03:24:11,932 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 03:24:11,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-14 03:24:11,933 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (2/3) [2021-06-14 03:24:11,933 WARN L243 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 03:24:11,933 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-14 03:24:11,936 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:11,936 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:11,936 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:11,936 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:11,936 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:11,936 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:11,936 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:11,937 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:11,941 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 03:24:11,942 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 03:24:11,947 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:11,947 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:11,947 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:11,947 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:11,947 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:11,948 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:11,948 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:11,948 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread1of2ForFork0======== [2021-06-14 03:24:11,949 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:11,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:11,950 INFO L82 PathProgramCache]: Analyzing trace with hash 57452648, now seen corresponding path program 1 times [2021-06-14 03:24:11,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:11,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467080904] [2021-06-14 03:24:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 03:24:11,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:11,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467080904] [2021-06-14 03:24:11,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467080904] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:24:11,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:24:11,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-14 03:24:11,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978476109] [2021-06-14 03:24:11,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 03:24:11,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 03:24:11,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 03:24:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:11,974 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:11,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 03:24:11,974 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:12,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:12,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-14 03:24:12,072 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:12,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1201240344, now seen corresponding path program 1 times [2021-06-14 03:24:12,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:12,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548709704] [2021-06-14 03:24:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:12,116 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 03:24:12,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:12,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548709704] [2021-06-14 03:24:12,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548709704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:12,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756185140] [2021-06-14 03:24:12,118 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:12,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-14 03:24:12,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:12,207 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 03:24:12,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756185140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:12,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:12,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-14 03:24:12,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140613716] [2021-06-14 03:24:12,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-14 03:24:12,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:12,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-14 03:24:12,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-14 03:24:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:12,209 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:12,210 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 03:24:12,210 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:12,210 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:12,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:12,509 INFO L301 ceAbstractionStarter]: Result for error location threadThread1of2ForFork0 was SAFE (1/4) [2021-06-14 03:24:12,510 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 03:24:12,523 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:12,523 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:12,524 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:12,524 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:12,524 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:12,524 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:12,524 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:12,524 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 03:24:12,526 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:12,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:12,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1849570646, now seen corresponding path program 1 times [2021-06-14 03:24:12,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:12,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246071222] [2021-06-14 03:24:12,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 03:24:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:12,578 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 03:24:12,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:12,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246071222] [2021-06-14 03:24:12,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246071222] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:24:12,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:24:12,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-14 03:24:12,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881967310] [2021-06-14 03:24:12,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-14 03:24:12,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:12,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-14 03:24:12,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-14 03:24:12,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:12,580 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:12,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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 03:24:12,580 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:12,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-14 03:24:12,638 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:12,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1849571607, now seen corresponding path program 1 times [2021-06-14 03:24:12,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:12,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483201335] [2021-06-14 03:24:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:12,652 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:12,662 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:12,663 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 03:24:12,664 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 03:24:12,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-14 03:24:12,668 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (2/4) [2021-06-14 03:24:12,668 WARN L243 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 03:24:12,668 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-14 03:24:12,672 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,672 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,672 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,672 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,674 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,674 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,674 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,675 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,675 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,675 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,675 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,675 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,690 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 03:24:12,691 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:24:12,698 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:12,698 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:12,698 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:12,698 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:12,698 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:12,698 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:12,698 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:12,698 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 03:24:12,702 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:12,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:12,702 INFO L82 PathProgramCache]: Analyzing trace with hash 999205645, now seen corresponding path program 1 times [2021-06-14 03:24:12,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:12,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056935036] [2021-06-14 03:24:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-14 03:24:12,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:12,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056935036] [2021-06-14 03:24:12,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056935036] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:24:12,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:24:12,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 03:24:12,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991035901] [2021-06-14 03:24:12,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 03:24:12,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:12,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 03:24:12,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 03:24:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:12,729 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:12,729 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 03:24:12,729 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:12,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-14 03:24:12,772 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:12,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:12,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1839136502, now seen corresponding path program 1 times [2021-06-14 03:24:12,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:12,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984806697] [2021-06-14 03:24:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:12,787 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:12,791 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:12,792 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 03:24:12,792 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 03:24:12,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-14 03:24:12,793 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (1/5) [2021-06-14 03:24:12,793 WARN L243 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 03:24:12,793 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-14 03:24:12,799 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,800 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,800 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,800 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,800 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,800 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,800 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,800 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,801 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,801 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,801 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,802 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,802 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,802 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,803 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,803 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:12,807 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 03:24:12,808 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 03:24:12,812 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:12,812 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:12,812 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:12,812 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:12,812 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:12,813 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:12,813 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:12,813 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread3of4ForFork0======== [2021-06-14 03:24:12,843 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:12,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:12,844 INFO L82 PathProgramCache]: Analyzing trace with hash -736376145, now seen corresponding path program 1 times [2021-06-14 03:24:12,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:12,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951403199] [2021-06-14 03:24:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:12,871 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 03:24:12,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:12,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951403199] [2021-06-14 03:24:12,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951403199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:12,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801695063] [2021-06-14 03:24:12,872 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 03:24:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:12,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-14 03:24:12,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:13,089 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 03:24:13,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801695063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:13,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:13,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-14 03:24:13,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999899450] [2021-06-14 03:24:13,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-14 03:24:13,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:13,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-14 03:24:13,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-14 03:24:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:13,091 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:13,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) 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 03:24:13,091 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:13,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:13,369 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:13,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:13,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1013328526, now seen corresponding path program 1 times [2021-06-14 03:24:13,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:13,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208244979] [2021-06-14 03:24:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 03:24:13,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:13,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208244979] [2021-06-14 03:24:13,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208244979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:13,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117774525] [2021-06-14 03:24:13,397 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 03:24:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:13,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 03:24:13,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 03:24:13,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117774525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:13,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:13,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-14 03:24:13,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771054144] [2021-06-14 03:24:13,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 03:24:13,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:13,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 03:24:13,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-14 03:24:13,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:13,538 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:13,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 03:24:13,538 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:13,539 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:13,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:13,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-14 03:24:13,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:13,865 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:13,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:13,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1352787445, now seen corresponding path program 1 times [2021-06-14 03:24:13,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:13,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508789671] [2021-06-14 03:24:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 03:24:13,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:13,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508789671] [2021-06-14 03:24:13,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508789671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:13,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877081615] [2021-06-14 03:24:13,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:13,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 03:24:13,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 03:24:14,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877081615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:14,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:14,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-14 03:24:14,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868981081] [2021-06-14 03:24:14,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-14 03:24:14,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:14,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-14 03:24:14,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-14 03:24:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:14,064 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:14,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 03:24:14,064 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:14,064 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 12 states. [2021-06-14 03:24:14,064 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-14 03:24:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-14 03:24:14,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-14 03:24:14,541 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:14,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:14,541 INFO L82 PathProgramCache]: Analyzing trace with hash 805039198, now seen corresponding path program 1 times [2021-06-14 03:24:14,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:14,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081648245] [2021-06-14 03:24:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-14 03:24:14,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:14,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081648245] [2021-06-14 03:24:14,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081648245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:14,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622958205] [2021-06-14 03:24:14,587 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 03:24:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:14,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-14 03:24:14,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:14,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 03:24:14,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622958205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:14,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:14,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-06-14 03:24:14,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002806455] [2021-06-14 03:24:14,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-14 03:24:14,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:14,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-14 03:24:14,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-14 03:24:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:14,735 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:14,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 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 03:24:14,735 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:14,735 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 12 states. [2021-06-14 03:24:14,735 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 17 states. [2021-06-14 03:24:14,735 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:24:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-14 03:24:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-14 03:24:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-14 03:24:15,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:15,937 INFO L301 ceAbstractionStarter]: Result for error location threadThread3of4ForFork0 was SAFE (1/6) [2021-06-14 03:24:15,937 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 03:24:15,941 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:15,941 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:15,941 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:15,941 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:15,941 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:15,941 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:15,941 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:15,941 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread1of4ForFork0======== [2021-06-14 03:24:15,942 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:15,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:15,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1998956631, now seen corresponding path program 1 times [2021-06-14 03:24:15,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:15,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106592941] [2021-06-14 03:24:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:15,975 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 03:24:15,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:15,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106592941] [2021-06-14 03:24:15,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106592941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:15,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906766275] [2021-06-14 03:24:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:15,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 03:24:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:16,034 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 03:24:16,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906766275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:16,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:16,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-14 03:24:16,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98192154] [2021-06-14 03:24:16,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-14 03:24:16,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:16,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-14 03:24:16,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-14 03:24:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:16,036 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:16,036 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 03:24:16,036 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:16,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:16,310 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:16,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:16,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1934415121, now seen corresponding path program 1 times [2021-06-14 03:24:16,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:16,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923268108] [2021-06-14 03:24:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:16,351 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 03:24:16,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:16,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923268108] [2021-06-14 03:24:16,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923268108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:16,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628656078] [2021-06-14 03:24:16,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-14 03:24:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:16,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:16,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:16,437 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 03:24:16,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628656078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:16,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:16,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-14 03:24:16,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744844488] [2021-06-14 03:24:16,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-14 03:24:16,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:16,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-14 03:24:16,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-14 03:24:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:16,438 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:16,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 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 03:24:16,438 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:16,438 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:16,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:16,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:16,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-14 03:24:16,781 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:16,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:16,781 INFO L82 PathProgramCache]: Analyzing trace with hash -162301554, now seen corresponding path program 1 times [2021-06-14 03:24:16,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:16,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462216448] [2021-06-14 03:24:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:16,784 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:16,787 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:16,788 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 03:24:16,788 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 03:24:16,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-14 03:24:16,788 INFO L301 ceAbstractionStarter]: Result for error location threadThread1of4ForFork0 was UNSAFE (2/6) [2021-06-14 03:24:16,793 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 03:24:16,798 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:16,798 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:16,798 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:16,798 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:16,798 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:16,798 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:16,798 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:16,798 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread2of4ForFork0======== [2021-06-14 03:24:16,811 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:16,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:16,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1838882401, now seen corresponding path program 1 times [2021-06-14 03:24:16,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:16,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334089979] [2021-06-14 03:24:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 03:24:16,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:16,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334089979] [2021-06-14 03:24:16,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334089979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:16,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438441743] [2021-06-14 03:24:16,846 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 03:24:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:16,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-14 03:24:16,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 03:24:16,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438441743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:16,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:16,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-14 03:24:16,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953413412] [2021-06-14 03:24:16,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-14 03:24:16,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:16,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-14 03:24:16,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-14 03:24:16,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:16,910 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:16,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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 03:24:16,910 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:16,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:24:17,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-14 03:24:17,170 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:17,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1934415125, now seen corresponding path program 1 times [2021-06-14 03:24:17,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:17,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104388618] [2021-06-14 03:24:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 03:24:17,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:17,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104388618] [2021-06-14 03:24:17,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104388618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:17,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091667243] [2021-06-14 03:24:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:17,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 03:24:17,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 03:24:17,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091667243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:17,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:17,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-14 03:24:17,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976837449] [2021-06-14 03:24:17,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-14 03:24:17,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:17,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-14 03:24:17,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-14 03:24:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:17,324 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:17,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 03:24:17,324 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:24:17,324 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:17,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:24:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:17,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-14 03:24:17,610 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:17,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:17,610 INFO L82 PathProgramCache]: Analyzing trace with hash -736376137, now seen corresponding path program 1 times [2021-06-14 03:24:17,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:17,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137611964] [2021-06-14 03:24:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 03:24:17,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:17,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137611964] [2021-06-14 03:24:17,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137611964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:17,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293036916] [2021-06-14 03:24:17,646 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 03:24:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:17,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-14 03:24:17,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 03:24:17,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293036916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:17,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:17,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-14 03:24:17,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908840530] [2021-06-14 03:24:17,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-14 03:24:17,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:17,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-14 03:24:17,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-14 03:24:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:17,733 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:17,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 03:24:17,733 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:24:17,733 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:17,733 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:17,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:24:17,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-14 03:24:18,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-14 03:24:18,101 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:18,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1728951320, now seen corresponding path program 1 times [2021-06-14 03:24:18,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:18,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509108534] [2021-06-14 03:24:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-14 03:24:18,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:18,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509108534] [2021-06-14 03:24:18,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509108534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:18,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616032614] [2021-06-14 03:24:18,153 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 03:24:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:18,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 03:24:18,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 03:24:18,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616032614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:18,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:18,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-14 03:24:18,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861943960] [2021-06-14 03:24:18,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-14 03:24:18,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:18,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-14 03:24:18,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-14 03:24:18,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:18,268 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:18,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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 03:24:18,268 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:24:18,268 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:18,268 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 12 states. [2021-06-14 03:24:18,268 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:24:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-14 03:24:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 03:24:18,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:18,613 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:18,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:18,614 INFO L82 PathProgramCache]: Analyzing trace with hash -960491988, now seen corresponding path program 1 times [2021-06-14 03:24:18,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:18,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942906132] [2021-06-14 03:24:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:18,621 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:18,625 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:18,629 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 03:24:18,629 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 03:24:18,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-14 03:24:18,631 INFO L301 ceAbstractionStarter]: Result for error location threadThread2of4ForFork0 was UNSAFE (3/6) [2021-06-14 03:24:18,631 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 03:24:18,647 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:18,648 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:18,648 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:18,648 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:18,648 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:18,648 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:18,648 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:18,648 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread4of4ForFork0======== Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 03:24:18,677 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:18,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:18,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1945649373, now seen corresponding path program 1 times [2021-06-14 03:24:18,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:18,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329381767] [2021-06-14 03:24:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-14 03:24:18,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:18,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329381767] [2021-06-14 03:24:18,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329381767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:18,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550657529] [2021-06-14 03:24:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:18,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-14 03:24:18,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-14 03:24:18,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550657529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:18,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:18,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-14 03:24:18,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804961865] [2021-06-14 03:24:18,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-14 03:24:18,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:18,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-14 03:24:18,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-14 03:24:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:18,789 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:18,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 03:24:18,789 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:19,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:19,053 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:19,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:19,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2087053729, now seen corresponding path program 1 times [2021-06-14 03:24:19,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:19,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604717821] [2021-06-14 03:24:19,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 03:24:19,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:19,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604717821] [2021-06-14 03:24:19,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604717821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:19,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878695115] [2021-06-14 03:24:19,087 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) [2021-06-14 03:24:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:19,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 03:24:19,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 03:24:19,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878695115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:19,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:19,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-14 03:24:19,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333402999] [2021-06-14 03:24:19,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-14 03:24:19,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:19,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-14 03:24:19,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-14 03:24:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:19,194 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:19,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 03:24:19,195 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:19,195 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:19,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:19,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-14 03:24:19,485 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:19,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:19,485 INFO L82 PathProgramCache]: Analyzing trace with hash -563407843, now seen corresponding path program 1 times [2021-06-14 03:24:19,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:19,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842637639] [2021-06-14 03:24:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-14 03:24:19,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:19,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842637639] [2021-06-14 03:24:19,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842637639] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:24:19,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:24:19,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-14 03:24:19,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607200269] [2021-06-14 03:24:19,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 03:24:19,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 03:24:19,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 03:24:19,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:19,514 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:19,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 03:24:19,514 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:19,514 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:19,514 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:19,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:19,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:19,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:19,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-14 03:24:19,567 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:19,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1728951324, now seen corresponding path program 1 times [2021-06-14 03:24:19,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:19,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614146601] [2021-06-14 03:24:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-14 03:24:19,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:19,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614146601] [2021-06-14 03:24:19,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614146601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:19,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533012189] [2021-06-14 03:24:19,597 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 03:24:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:19,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 03:24:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 03:24:19,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533012189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:19,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:19,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-14 03:24:19,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224785962] [2021-06-14 03:24:19,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-14 03:24:19,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:19,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-14 03:24:19,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-14 03:24:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:19,718 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:19,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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 03:24:19,718 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:19,718 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:19,718 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:19,718 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 03:24:20,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:20,051 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:20,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1693539448, now seen corresponding path program 1 times [2021-06-14 03:24:20,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:20,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367219591] [2021-06-14 03:24:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:20,073 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 03:24:20,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:20,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367219591] [2021-06-14 03:24:20,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367219591] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:24:20,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:24:20,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-14 03:24:20,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889481403] [2021-06-14 03:24:20,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-14 03:24:20,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:20,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-14 03:24:20,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-14 03:24:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:20,074 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:20,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 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 03:24:20,074 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:20,074 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:20,074 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:20,074 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 03:24:20,074 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 03:24:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:20,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-14 03:24:20,172 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:20,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:20,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1393410982, now seen corresponding path program 1 times [2021-06-14 03:24:20,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:20,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268894695] [2021-06-14 03:24:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:20,196 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 03:24:20,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:20,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268894695] [2021-06-14 03:24:20,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268894695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:20,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898373667] [2021-06-14 03:24:20,196 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 03:24:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:20,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-14 03:24:20,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 03:24:20,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898373667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:20,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:20,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 17 [2021-06-14 03:24:20,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590762464] [2021-06-14 03:24:20,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-14 03:24:20,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:20,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-14 03:24:20,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-14 03:24:20,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:20,368 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:20,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 18 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 03:24:20,368 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:20,368 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:20,368 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:20,368 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-06-14 03:24:20,368 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:20,368 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-14 03:24:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-14 03:24:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-14 03:24:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-14 03:24:21,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-14 03:24:21,378 INFO L301 ceAbstractionStarter]: Result for error location threadThread4of4ForFork0 was SAFE (4/6) [2021-06-14 03:24:21,379 INFO L255 AbstractCegarLoop]: 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 03:24:21,382 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:21,382 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:21,382 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:21,382 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:21,382 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:21,382 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:21,382 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:21,382 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 03:24:21,399 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:21,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1736100916, now seen corresponding path program 1 times [2021-06-14 03:24:21,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:21,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359248812] [2021-06-14 03:24:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-14 03:24:21,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:21,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359248812] [2021-06-14 03:24:21,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359248812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:21,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116510704] [2021-06-14 03:24:21,423 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) [2021-06-14 03:24:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:21,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:21,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-14 03:24:21,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116510704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:21,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:21,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-14 03:24:21,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639584923] [2021-06-14 03:24:21,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-14 03:24:21,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:21,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-14 03:24:21,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-14 03:24:21,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:21,521 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:21,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 03:24:21,521 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:21,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:21,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-14 03:24:21,765 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash -247981514, now seen corresponding path program 1 times [2021-06-14 03:24:21,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:21,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175954816] [2021-06-14 03:24:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 03:24:21,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:21,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175954816] [2021-06-14 03:24:21,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175954816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:21,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26076069] [2021-06-14 03:24:21,784 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) [2021-06-14 03:24:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:21,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-14 03:24:21,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 03:24:21,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26076069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:21,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:21,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-14 03:24:21,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555851258] [2021-06-14 03:24:21,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-14 03:24:21,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:21,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-14 03:24:21,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-14 03:24:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:21,883 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:21,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 03:24:21,883 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:21,883 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:21,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:21,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-14 03:24:22,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-14 03:24:22,193 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:22,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2064215924, now seen corresponding path program 1 times [2021-06-14 03:24:22,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:22,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129347559] [2021-06-14 03:24:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-14 03:24:22,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:22,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129347559] [2021-06-14 03:24:22,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129347559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:22,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271424726] [2021-06-14 03:24:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-14 03:24:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:22,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 03:24:22,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-14 03:24:22,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271424726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:22,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:22,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-14 03:24:22,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138991751] [2021-06-14 03:24:22,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-14 03:24:22,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:22,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-14 03:24:22,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-14 03:24:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:22,356 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:22,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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 03:24:22,356 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:22,356 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 12 states. [2021-06-14 03:24:22,356 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-14 03:24:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-14 03:24:22,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-14 03:24:22,677 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:22,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:22,677 INFO L82 PathProgramCache]: Analyzing trace with hash -960115703, now seen corresponding path program 1 times [2021-06-14 03:24:22,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:22,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635829936] [2021-06-14 03:24:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:22,680 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:22,681 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:22,682 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 03:24:22,682 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 03:24:22,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-14 03:24:22,683 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (5/6) [2021-06-14 03:24:22,683 WARN L243 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 03:24:22,683 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-06-14 03:24:22,687 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,687 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,687 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,687 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,688 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,688 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,688 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,688 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,688 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,688 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,688 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,689 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,689 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,689 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,689 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,689 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,689 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,689 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,689 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,689 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:22,692 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 03:24:22,692 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 03:24:22,697 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:22,697 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:22,697 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:22,697 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:22,697 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:22,697 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:22,697 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:22,697 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread1of5ForFork0======== [2021-06-14 03:24:22,698 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:22,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:22,698 INFO L82 PathProgramCache]: Analyzing trace with hash -549506375, now seen corresponding path program 1 times [2021-06-14 03:24:22,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:22,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302144740] [2021-06-14 03:24:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:22,713 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 03:24:22,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:22,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302144740] [2021-06-14 03:24:22,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302144740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:22,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709741842] [2021-06-14 03:24:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 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 03:24:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:22,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 03:24:22,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:22,759 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 03:24:22,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709741842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:22,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:22,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-14 03:24:22,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642694639] [2021-06-14 03:24:22,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-14 03:24:22,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:22,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-14 03:24:22,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-14 03:24:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:22,782 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:22,782 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 03:24:22,782 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:23,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:23,553 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1178572449, now seen corresponding path program 1 times [2021-06-14 03:24:23,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:23,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915078634] [2021-06-14 03:24:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:23,556 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:23,557 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:23,558 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 03:24:23,558 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 03:24:23,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-14 03:24:23,559 INFO L301 ceAbstractionStarter]: Result for error location threadThread1of5ForFork0 was UNSAFE (1/7) [2021-06-14 03:24:23,559 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:24:23,562 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:23,562 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:23,562 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:23,562 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:23,562 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:23,562 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:23,562 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:23,562 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread2of5ForFork0======== [2021-06-14 03:24:23,563 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:23,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:23,563 INFO L82 PathProgramCache]: Analyzing trace with hash 212792886, now seen corresponding path program 1 times [2021-06-14 03:24:23,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:23,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370059394] [2021-06-14 03:24:23,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 03:24:23,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:23,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370059394] [2021-06-14 03:24:23,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370059394] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:24:23,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:24:23,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 03:24:23,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822303527] [2021-06-14 03:24:23,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-14 03:24:23,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:23,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-14 03:24:23,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-14 03:24:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:23,583 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:23,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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 03:24:23,583 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:24:23,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-14 03:24:23,730 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:23,730 INFO L82 PathProgramCache]: Analyzing trace with hash 861610587, now seen corresponding path program 1 times [2021-06-14 03:24:23,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:23,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828990795] [2021-06-14 03:24:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:23,745 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 03:24:23,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:23,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828990795] [2021-06-14 03:24:23,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828990795] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:24:23,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:24:23,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 03:24:23,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790341022] [2021-06-14 03:24:23,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 03:24:23,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:23,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 03:24:23,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 03:24:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:23,746 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:23,747 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 03:24:23,747 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:24:23,747 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:24:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:23,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-14 03:24:23,919 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:23,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1636237739, now seen corresponding path program 1 times [2021-06-14 03:24:23,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:23,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200449690] [2021-06-14 03:24:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 03:24:23,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:23,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200449690] [2021-06-14 03:24:23,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200449690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:23,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474440956] [2021-06-14 03:24:23,956 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 03:24:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:23,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-14 03:24:23,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 03:24:24,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474440956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:24,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:24,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-06-14 03:24:24,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833746826] [2021-06-14 03:24:24,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-14 03:24:24,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:24,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-14 03:24:24,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-14 03:24:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:24,081 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:24,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 03:24:24,081 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:24:24,081 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:24,081 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:24,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:24:24,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:24,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-14 03:24:24,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-14 03:24:24,496 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:24,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:24,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1664866890, now seen corresponding path program 1 times [2021-06-14 03:24:24,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:24,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786147005] [2021-06-14 03:24:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:24,501 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:24,503 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:24,505 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 03:24:24,505 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 03:24:24,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-14 03:24:24,507 INFO L301 ceAbstractionStarter]: Result for error location threadThread2of5ForFork0 was UNSAFE (2/7) [2021-06-14 03:24:24,508 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 03:24:24,515 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:24,515 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:24,515 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:24,515 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:24,515 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:24,515 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:24,515 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:24,515 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread3of5ForFork0======== [2021-06-14 03:24:24,541 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:24,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1530859684, now seen corresponding path program 1 times [2021-06-14 03:24:24,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:24,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827190854] [2021-06-14 03:24:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:24,561 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 03:24:24,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:24,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827190854] [2021-06-14 03:24:24,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827190854] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:24:24,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:24:24,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 03:24:24,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652468577] [2021-06-14 03:24:24,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 03:24:24,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:24,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 03:24:24,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 03:24:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:24,562 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:24,562 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 03:24:24,562 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:24,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-14 03:24:24,599 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:24,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:24,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1472655860, now seen corresponding path program 1 times [2021-06-14 03:24:24,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:24,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075769719] [2021-06-14 03:24:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 03:24:24,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:24,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075769719] [2021-06-14 03:24:24,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075769719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:24,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422912391] [2021-06-14 03:24:24,630 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 03:24:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:24,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-14 03:24:24,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 03:24:24,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422912391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:24,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:24,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-06-14 03:24:24,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022602670] [2021-06-14 03:24:24,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-14 03:24:24,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:24,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-14 03:24:24,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-14 03:24:24,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:24,770 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:24,770 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 03:24:24,770 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:24,770 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-14 03:24:25,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-14 03:24:25,161 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:25,161 INFO L82 PathProgramCache]: Analyzing trace with hash -585152179, now seen corresponding path program 1 times [2021-06-14 03:24:25,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:25,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005810758] [2021-06-14 03:24:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:25,165 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:25,167 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:25,168 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 03:24:25,169 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 03:24:25,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-14 03:24:25,171 INFO L301 ceAbstractionStarter]: Result for error location threadThread3of5ForFork0 was UNSAFE (3/7) [2021-06-14 03:24:25,171 INFO L255 AbstractCegarLoop]: 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 03:24:25,177 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:25,177 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:25,177 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:25,177 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:25,177 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:25,177 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:25,178 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:25,178 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 03:24:25,204 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:25,204 INFO L82 PathProgramCache]: Analyzing trace with hash -657754751, now seen corresponding path program 1 times [2021-06-14 03:24:25,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:25,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639997542] [2021-06-14 03:24:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:25,223 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 03:24:25,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:25,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639997542] [2021-06-14 03:24:25,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639997542] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:24:25,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:24:25,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-14 03:24:25,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639915899] [2021-06-14 03:24:25,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-14 03:24:25,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:25,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-14 03:24:25,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-14 03:24:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:25,224 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:25,224 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 03:24:25,224 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:25,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-14 03:24:25,264 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:25,264 INFO L82 PathProgramCache]: Analyzing trace with hash 116872401, now seen corresponding path program 1 times [2021-06-14 03:24:25,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:25,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149607573] [2021-06-14 03:24:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-14 03:24:25,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:25,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149607573] [2021-06-14 03:24:25,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149607573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:25,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448275783] [2021-06-14 03:24:25,297 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 03:24:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:25,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-14 03:24:25,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 03:24:25,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448275783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:25,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:25,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-06-14 03:24:25,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748194853] [2021-06-14 03:24:25,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-14 03:24:25,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:25,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-14 03:24:25,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-14 03:24:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:25,428 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:25,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 03:24:25,428 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:25,428 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:25,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:24:25,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-14 03:24:25,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-14 03:24:25,738 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash 116902192, now seen corresponding path program 1 times [2021-06-14 03:24:25,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:25,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493503560] [2021-06-14 03:24:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:25,741 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:25,743 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:25,744 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 03:24:25,744 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 03:24:25,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-14 03:24:25,744 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (4/7) [2021-06-14 03:24:25,744 WARN L243 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 03:24:25,744 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-06-14 03:24:25,751 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,751 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,751 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,751 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,751 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,751 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,751 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,751 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,751 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,751 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,751 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,751 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,752 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,752 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,752 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,752 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,752 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,752 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,752 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,752 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,752 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,752 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,753 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,753 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:25,756 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 03:24:25,757 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 03:24:25,760 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:25,760 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:25,760 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:25,760 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:25,760 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:25,760 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:25,760 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:25,760 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread6of6ForFork0======== [2021-06-14 03:24:25,777 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:25,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:25,778 INFO L82 PathProgramCache]: Analyzing trace with hash 608385165, now seen corresponding path program 1 times [2021-06-14 03:24:25,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:25,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305331967] [2021-06-14 03:24:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 03:24:25,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:25,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305331967] [2021-06-14 03:24:25,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305331967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:25,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986213759] [2021-06-14 03:24:25,801 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 03:24:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:25,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-14 03:24:25,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 03:24:25,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986213759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:25,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:25,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-06-14 03:24:25,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804499663] [2021-06-14 03:24:25,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-14 03:24:25,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:25,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-14 03:24:25,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-14 03:24:25,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:25,977 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:25,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) 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 03:24:25,977 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-14 03:24:26,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:26,445 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:26,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:26,445 INFO L82 PathProgramCache]: Analyzing trace with hash -118892558, now seen corresponding path program 1 times [2021-06-14 03:24:26,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:26,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122084059] [2021-06-14 03:24:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:26,466 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 03:24:26,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:26,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122084059] [2021-06-14 03:24:26,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122084059] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:24:26,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:24:26,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-14 03:24:26,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714638614] [2021-06-14 03:24:26,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-14 03:24:26,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:26,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-14 03:24:26,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-14 03:24:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:26,467 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:26,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 03:24:26,467 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 23 states. [2021-06-14 03:24:26,467 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:26,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-14 03:24:26,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:26,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-14 03:24:26,537 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:26,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:26,537 INFO L82 PathProgramCache]: Analyzing trace with hash -118553325, now seen corresponding path program 1 times [2021-06-14 03:24:26,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:26,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210949990] [2021-06-14 03:24:26,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:26,599 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 03:24:26,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:26,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210949990] [2021-06-14 03:24:26,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210949990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:26,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799434414] [2021-06-14 03:24:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:26,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-14 03:24:26,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 03:24:26,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799434414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:26,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:26,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14] total 21 [2021-06-14 03:24:26,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812115358] [2021-06-14 03:24:26,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-14 03:24:26,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:26,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-14 03:24:26,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-14 03:24:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:26,833 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:26,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 03:24:26,833 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 23 states. [2021-06-14 03:24:26,833 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:26,833 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-14 03:24:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:24:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-14 03:24:50,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:50,039 INFO L301 ceAbstractionStarter]: Result for error location threadThread6of6ForFork0 was SAFE (1/8) [2021-06-14 03:24:50,039 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 03:24:50,043 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:50,043 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:50,043 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:50,043 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:50,043 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:50,043 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:50,043 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:50,043 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-14 03:24:50,060 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:50,060 INFO L82 PathProgramCache]: Analyzing trace with hash 542595975, now seen corresponding path program 1 times [2021-06-14 03:24:50,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:50,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185409404] [2021-06-14 03:24:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:50,092 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 03:24:50,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:50,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185409404] [2021-06-14 03:24:50,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185409404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:50,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102874971] [2021-06-14 03:24:50,093 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 03:24:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:50,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-14 03:24:50,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 03:24:50,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102874971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:50,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:50,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-06-14 03:24:50,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145750340] [2021-06-14 03:24:50,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-14 03:24:50,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:50,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-14 03:24:50,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-14 03:24:50,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:50,263 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:50,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 03:24:50,263 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-14 03:24:50,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:50,714 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:50,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:50,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1420506954, now seen corresponding path program 1 times [2021-06-14 03:24:50,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:50,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145794833] [2021-06-14 03:24:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-14 03:24:50,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:50,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145794833] [2021-06-14 03:24:50,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145794833] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:24:50,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:24:50,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-14 03:24:50,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483689661] [2021-06-14 03:24:50,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-14 03:24:50,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:50,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-14 03:24:50,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-14 03:24:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:50,737 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:50,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-14 03:24:50,737 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 23 states. [2021-06-14 03:24:50,737 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-14 03:24:50,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:24:50,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-14 03:24:50,790 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-14 03:24:50,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:50,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1708390718, now seen corresponding path program 1 times [2021-06-14 03:24:50,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:50,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473869073] [2021-06-14 03:24:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:50,793 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:50,795 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:50,796 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 03:24:50,796 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 03:24:50,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-06-14 03:24:50,796 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (2/8) [2021-06-14 03:24:50,797 WARN L243 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-14 03:24:50,797 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-06-14 03:24:50,807 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,807 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,807 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,807 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,807 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,808 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,808 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,808 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,808 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,808 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,808 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,808 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,808 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,808 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,808 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,808 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,808 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,809 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,809 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,809 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,809 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,809 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,809 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,809 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,809 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,809 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,809 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,809 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-14 03:24:50,813 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-14 03:24:50,813 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 03:24:50,817 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:50,817 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:50,817 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:50,817 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:50,817 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:50,817 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:50,817 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:50,817 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread5of7ForFork0======== [2021-06-14 03:24:50,831 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:50,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1308062196, now seen corresponding path program 1 times [2021-06-14 03:24:50,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:50,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749023815] [2021-06-14 03:24:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-06-14 03:24:50,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:50,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749023815] [2021-06-14 03:24:50,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749023815] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:24:50,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:24:50,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-14 03:24:50,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484318521] [2021-06-14 03:24:50,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-14 03:24:50,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:50,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-14 03:24:50,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-14 03:24:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:50,852 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:50,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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 03:24:50,852 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:50,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:24:50,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-06-14 03:24:50,910 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:50,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:50,910 INFO L82 PathProgramCache]: Analyzing trace with hash 782298745, now seen corresponding path program 1 times [2021-06-14 03:24:50,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:50,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176558031] [2021-06-14 03:24:50,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-14 03:24:50,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:50,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176558031] [2021-06-14 03:24:50,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176558031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:50,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126534571] [2021-06-14 03:24:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:50,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 03:24:50,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-14 03:24:51,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126534571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:51,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:51,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-14 03:24:51,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272802356] [2021-06-14 03:24:51,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-14 03:24:51,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:51,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-14 03:24:51,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-14 03:24:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:51,056 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:51,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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 03:24:51,056 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:24:51,056 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:24:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 03:24:51,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-14 03:24:51,411 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:51,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:51,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1331761458, now seen corresponding path program 1 times [2021-06-14 03:24:51,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:51,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443407882] [2021-06-14 03:24:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-14 03:24:51,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:51,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443407882] [2021-06-14 03:24:51,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443407882] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:24:51,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:24:51,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-14 03:24:51,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802669487] [2021-06-14 03:24:51,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-14 03:24:51,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:51,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-14 03:24:51,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-14 03:24:51,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:51,435 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:51,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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 03:24:51,435 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:24:51,435 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 03:24:51,435 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:24:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 03:24:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:24:51,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-06-14 03:24:51,504 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:51,505 INFO L82 PathProgramCache]: Analyzing trace with hash -950333741, now seen corresponding path program 1 times [2021-06-14 03:24:51,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:51,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503136737] [2021-06-14 03:24:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-14 03:24:51,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:51,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503136737] [2021-06-14 03:24:51,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503136737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:51,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212450357] [2021-06-14 03:24:51,542 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 03:24:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:51,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-14 03:24:51,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 03:24:51,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212450357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:51,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:51,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-06-14 03:24:51,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14497438] [2021-06-14 03:24:51,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-14 03:24:51,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:51,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-14 03:24:51,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-14 03:24:51,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:51,726 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:51,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 20 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 03:24:51,726 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:24:51,726 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 03:24:51,726 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:24:51,726 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:24:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 03:24:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:24:52,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-14 03:24:52,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:24:52,346 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:52,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:52,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1278349500, now seen corresponding path program 1 times [2021-06-14 03:24:52,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:52,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744035536] [2021-06-14 03:24:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:52,369 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:24:52,372 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:24:52,373 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 03:24:52,373 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 03:24:52,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-06-14 03:24:52,375 INFO L301 ceAbstractionStarter]: Result for error location threadThread5of7ForFork0 was UNSAFE (1/9) [2021-06-14 03:24:52,376 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-14 03:24:52,416 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:24:52,416 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:24:52,416 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:24:52,416 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:24:52,417 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:24:52,417 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:24:52,417 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:24:52,417 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread1of7ForFork0======== [2021-06-14 03:24:52,417 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:24:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:24:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash -480059540, now seen corresponding path program 1 times [2021-06-14 03:24:52,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:24:52,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359285723] [2021-06-14 03:24:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:24:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 03:24:52,431 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 03:24:52,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:24:52,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359285723] [2021-06-14 03:24:52,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359285723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:52,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213413562] [2021-06-14 03:24:52,432 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 03:24:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:24:52,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-14 03:24:52,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:24:52,488 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 03:24:52,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213413562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:24:52,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:24:52,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-14 03:24:52,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021969187] [2021-06-14 03:24:52,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-14 03:24:52,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:24:52,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-14 03:24:52,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-14 03:24:52,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:24:52,503 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:24:52,503 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 03:24:52,503 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:26:53,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:26:53,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:26:53,593 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:26:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:26:53,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1791299171, now seen corresponding path program 1 times [2021-06-14 03:26:53,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:26:53,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638368916] [2021-06-14 03:26:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:26:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:26:53,626 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 03:26:53,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:26:53,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638368916] [2021-06-14 03:26:53,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638368916] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:26:53,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:26:53,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-14 03:26:53,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610381028] [2021-06-14 03:26:53,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-14 03:26:53,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:26:53,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-14 03:26:53,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-14 03:26:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:26:53,634 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:26:53,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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 03:26:53,634 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:26:53,634 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:27:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-14 03:27:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-14 03:27:25,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-06-14 03:27:25,342 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:27:25,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:27:25,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1790375650, now seen corresponding path program 1 times [2021-06-14 03:27:25,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:27:25,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685343146] [2021-06-14 03:27:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:27:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:27:25,361 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:27:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-14 03:27:25,362 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-14 03:27:25,363 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-14 03:27:25,363 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-14 03:27:25,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-06-14 03:27:25,364 INFO L301 ceAbstractionStarter]: Result for error location threadThread1of7ForFork0 was UNSAFE (2/9) [2021-06-14 03:27:25,364 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-14 03:27:25,422 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-14 03:27:25,422 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-14 03:27:25,422 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-14 03:27:25,422 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-14 03:27:25,422 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-14 03:27:25,422 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-14 03:27:25,422 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-14 03:27:25,422 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == threadThread7of7ForFork0======== [2021-06-14 03:27:25,447 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:27:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:27:25,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2077744996, now seen corresponding path program 1 times [2021-06-14 03:27:25,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:27:25,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083943258] [2021-06-14 03:27:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:27:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:27:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-06-14 03:27:25,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:27:25,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083943258] [2021-06-14 03:27:25,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083943258] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:27:25,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:27:25,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-14 03:27:25,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342513233] [2021-06-14 03:27:25,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-14 03:27:25,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:27:25,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-14 03:27:25,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-14 03:27:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:27:25,470 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:27:25,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 03:27:25,470 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:27:25,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:27:25,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-06-14 03:27:25,540 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:27:25,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:27:25,540 INFO L82 PathProgramCache]: Analyzing trace with hash 869914769, now seen corresponding path program 1 times [2021-06-14 03:27:25,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:27:25,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552577781] [2021-06-14 03:27:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:27:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:27:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-14 03:27:25,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:27:25,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552577781] [2021-06-14 03:27:25,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552577781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:27:25,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080502786] [2021-06-14 03:27:25,609 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 03:27:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:27:25,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-14 03:27:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:27:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-14 03:27:25,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080502786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:27:25,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:27:25,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-14 03:27:25,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943437355] [2021-06-14 03:27:25,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-14 03:27:25,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:27:25,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-14 03:27:25,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-14 03:27:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:27:25,919 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:27:25,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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 03:27:25,919 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:27:25,919 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:27:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:27:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 03:27:26,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-14 03:27:26,329 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:27:26,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:27:26,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1399351451, now seen corresponding path program 1 times [2021-06-14 03:27:26,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:27:26,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088376815] [2021-06-14 03:27:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:27:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:27:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-14 03:27:26,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:27:26,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088376815] [2021-06-14 03:27:26,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088376815] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:27:26,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:27:26,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-14 03:27:26,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71295704] [2021-06-14 03:27:26,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-14 03:27:26,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:27:26,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-14 03:27:26,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-14 03:27:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:27:26,367 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:27:26,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 03:27:26,368 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:27:26,368 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 03:27:26,368 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:27:26,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:27:26,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 03:27:26,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:27:26,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-06-14 03:27:26,454 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:27:26,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:27:26,454 INFO L82 PathProgramCache]: Analyzing trace with hash 486059452, now seen corresponding path program 1 times [2021-06-14 03:27:26,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:27:26,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314202383] [2021-06-14 03:27:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:27:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:27:26,482 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 03:27:26,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:27:26,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314202383] [2021-06-14 03:27:26,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314202383] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-14 03:27:26,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-14 03:27:26,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-14 03:27:26,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024717375] [2021-06-14 03:27:26,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-14 03:27:26,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:27:26,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-14 03:27:26,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-14 03:27:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:27:26,483 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:27:26,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 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 03:27:26,483 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:27:26,483 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 03:27:26,483 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:27:26,483 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:27:26,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:27:26,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-14 03:27:26,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:27:26,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:27:26,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-06-14 03:27:26,584 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:27:26,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:27:26,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1564765821, now seen corresponding path program 1 times [2021-06-14 03:27:26,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:27:26,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440594797] [2021-06-14 03:27:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:27:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:27:26,642 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 03:27:26,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:27:26,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440594797] [2021-06-14 03:27:26,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440594797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:27:26,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757733365] [2021-06-14 03:27:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:27:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:27:26,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-14 03:27:26,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:27:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-14 03:27:26,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757733365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:27:26,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:27:26,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 22 [2021-06-14 03:27:26,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112517970] [2021-06-14 03:27:26,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-14 03:27:26,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:27:26,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-14 03:27:26,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-14 03:27:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:27:26,902 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:27:26,902 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 03:27:26,902 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:27:26,902 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 19 states. [2021-06-14 03:27:26,902 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:27:26,902 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:27:26,902 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:27:27,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:27:27,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-14 03:27:27,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:27:27,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:27:27,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-14 03:27:27,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-14 03:27:27,771 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-14 03:27:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-14 03:27:27,771 INFO L82 PathProgramCache]: Analyzing trace with hash 2115976914, now seen corresponding path program 1 times [2021-06-14 03:27:27,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-14 03:27:27,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953963680] [2021-06-14 03:27:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-14 03:27:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:27:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-14 03:27:27,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-14 03:27:27,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953963680] [2021-06-14 03:27:27,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953963680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:27:27,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41382444] [2021-06-14 03:27:27,813 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 03:27:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-14 03:27:27,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-14 03:27:27,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-14 03:27:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-14 03:27:28,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41382444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-14 03:27:28,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-14 03:27:28,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 24 [2021-06-14 03:27:28,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812942425] [2021-06-14 03:27:28,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-14 03:27:28,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-14 03:27:28,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-14 03:27:28,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-14 03:27:28,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:27:28,063 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-14 03:27:28,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 25 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 03:27:28,064 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2021-06-14 03:27:28,064 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 20 states. [2021-06-14 03:27:28,064 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-06-14 03:27:28,064 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-06-14 03:27:28,064 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 36 states. [2021-06-14 03:27:28,064 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-14 03:27:29,075 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11