/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:45:11,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:45:11,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:45:11,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:45:11,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:45:11,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:45:11,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:45:11,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:45:11,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:45:11,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:45:11,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:45:11,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:45:11,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:45:11,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:45:11,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:45:11,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:45:11,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:45:11,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:45:11,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:45:11,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:45:11,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:45:11,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:45:11,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:45:11,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:45:11,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:45:11,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:45:11,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:45:11,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:45:11,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:45:11,975 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:45:11,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:45:11,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:45:11,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:45:11,977 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:45:11,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:45:11,977 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:45:11,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:45:11,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:45:11,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:45:11,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:45:11,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:45:11,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:45:11,979 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:45:11,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:45:11,979 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:45:11,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:45:11,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:45:11,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:45:11,980 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:45:11,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:45:11,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:45:11,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:45:11,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:45:11,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:45:11,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:45:11,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:45:11,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:45:11,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:45:11,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:45:12,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:45:12,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:45:12,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:45:12,364 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:45:12,365 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:45:12,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-10-23 18:45:12,452 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc0279094/b315959fd5c84ebb927b782a04dbebea/FLAG9a873a668 [2020-10-23 18:45:13,098 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:45:13,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-10-23 18:45:13,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc0279094/b315959fd5c84ebb927b782a04dbebea/FLAG9a873a668 [2020-10-23 18:45:13,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc0279094/b315959fd5c84ebb927b782a04dbebea [2020-10-23 18:45:13,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:45:13,483 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:45:13,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:45:13,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:45:13,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:45:13,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c5be67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13, skipping insertion in model container [2020-10-23 18:45:13,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:45:13,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:45:13,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:45:13,692 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:45:13,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:45:13,729 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:45:13,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13 WrapperNode [2020-10-23 18:45:13,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:45:13,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:45:13,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:45:13,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:45:13,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:45:13,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:45:13,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:45:13,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:45:13,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (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 [2020-10-23 18:45:13,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:45:13,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:45:13,852 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:45:13,853 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:45:13,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:45:13,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:45:13,854 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:45:13,854 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:45:13,854 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:45:13,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:45:13,855 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:45:13,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:45:13,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 18:45:13,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:45:13,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:45:13,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:45:13,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:45:13,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:45:13,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:45:13,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:45:14,339 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:45:14,340 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:45:14,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:45:14 BoogieIcfgContainer [2020-10-23 18:45:14,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:45:14,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:45:14,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:45:14,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:45:14,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:45:13" (1/3) ... [2020-10-23 18:45:14,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b65c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:45:14, skipping insertion in model container [2020-10-23 18:45:14,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (2/3) ... [2020-10-23 18:45:14,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62b65c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:45:14, skipping insertion in model container [2020-10-23 18:45:14,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:45:14" (3/3) ... [2020-10-23 18:45:14,355 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-10-23 18:45:14,369 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:45:14,377 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:45:14,391 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:45:14,434 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:45:14,463 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:45:14,463 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:45:14,463 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:45:14,464 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:45:14,464 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:45:14,464 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:45:14,464 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:45:14,489 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-23 18:45:14,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:45:14,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:14,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:14,498 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:14,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1534369198, now seen corresponding path program 1 times [2020-10-23 18:45:14,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:14,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194471512] [2020-10-23 18:45:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:15,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:15,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194471512] [2020-10-23 18:45:15,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:45:15,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:45:15,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120315149] [2020-10-23 18:45:15,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:45:15,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:15,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:45:15,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:45:15,094 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 6 states. [2020-10-23 18:45:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:15,434 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-10-23 18:45:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:45:15,436 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-23 18:45:15,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:15,445 INFO L225 Difference]: With dead ends: 56 [2020-10-23 18:45:15,445 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:45:15,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:45:15,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:45:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:45:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:45:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-23 18:45:15,493 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-10-23 18:45:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:15,493 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-23 18:45:15,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:45:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-23 18:45:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:45:15,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:15,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:15,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:45:15,495 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:15,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:15,496 INFO L82 PathProgramCache]: Analyzing trace with hash 933992070, now seen corresponding path program 1 times [2020-10-23 18:45:15,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:15,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768851039] [2020-10-23 18:45:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:15,848 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-10-23 18:45:16,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:16,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768851039] [2020-10-23 18:45:16,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457310005] [2020-10-23 18:45:16,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:16,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-23 18:45:16,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:16,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-23 18:45:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:16,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:16,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2020-10-23 18:45:16,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641071852] [2020-10-23 18:45:16,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:45:16,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:16,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:45:16,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:45:16,405 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 14 states. [2020-10-23 18:45:16,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:16,831 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-10-23 18:45:16,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:45:16,832 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-10-23 18:45:16,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:16,833 INFO L225 Difference]: With dead ends: 39 [2020-10-23 18:45:16,833 INFO L226 Difference]: Without dead ends: 25 [2020-10-23 18:45:16,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:45:16,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-23 18:45:16,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-23 18:45:16,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-23 18:45:16,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-23 18:45:16,842 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-10-23 18:45:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:16,843 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-23 18:45:16,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:45:16,843 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-23 18:45:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:45:16,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:16,844 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:17,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:45:17,059 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:17,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1097400953, now seen corresponding path program 1 times [2020-10-23 18:45:17,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:17,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508305947] [2020-10-23 18:45:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:17,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:17,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508305947] [2020-10-23 18:45:17,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950197943] [2020-10-23 18:45:17,607 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 [2020-10-23 18:45:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:17,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-23 18:45:17,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:18,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:18,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2020-10-23 18:45:18,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633091389] [2020-10-23 18:45:18,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 18:45:18,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:18,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 18:45:18,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:45:18,055 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 20 states. [2020-10-23 18:45:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:18,946 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-10-23 18:45:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:45:18,947 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2020-10-23 18:45:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:18,948 INFO L225 Difference]: With dead ends: 44 [2020-10-23 18:45:18,948 INFO L226 Difference]: Without dead ends: 30 [2020-10-23 18:45:18,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:45:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-23 18:45:18,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-23 18:45:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 18:45:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-23 18:45:18,957 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-10-23 18:45:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:18,957 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-23 18:45:18,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 18:45:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-23 18:45:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:45:18,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:18,958 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:19,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:19,173 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:19,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:19,174 INFO L82 PathProgramCache]: Analyzing trace with hash -945392280, now seen corresponding path program 1 times [2020-10-23 18:45:19,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:19,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482135380] [2020-10-23 18:45:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:19,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:19,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:19,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482135380] [2020-10-23 18:45:19,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120397730] [2020-10-23 18:45:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:19,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-23 18:45:19,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:20,035 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:20,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:20,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2020-10-23 18:45:20,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698063701] [2020-10-23 18:45:20,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:45:20,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:20,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:45:20,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:45:20,108 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 21 states. [2020-10-23 18:45:21,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:21,115 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-10-23 18:45:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:45:21,118 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-10-23 18:45:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:21,119 INFO L225 Difference]: With dead ends: 48 [2020-10-23 18:45:21,119 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 18:45:21,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2020-10-23 18:45:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 18:45:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-23 18:45:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 18:45:21,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-23 18:45:21,128 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2020-10-23 18:45:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:21,129 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-23 18:45:21,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:45:21,129 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-23 18:45:21,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:45:21,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:21,130 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:21,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:21,333 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:21,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:21,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1324006346, now seen corresponding path program 1 times [2020-10-23 18:45:21,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:21,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279822997] [2020-10-23 18:45:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:22,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:22,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279822997] [2020-10-23 18:45:22,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121693910] [2020-10-23 18:45:22,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:22,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-23 18:45:22,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:22,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:22,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:45:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:22,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:22,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2020-10-23 18:45:22,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940744405] [2020-10-23 18:45:22,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-23 18:45:22,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:22,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-23 18:45:22,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-10-23 18:45:22,960 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 26 states. [2020-10-23 18:45:24,019 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-23 18:45:24,205 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-23 18:45:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:24,550 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-10-23 18:45:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:45:24,550 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-23 18:45:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:24,551 INFO L225 Difference]: With dead ends: 51 [2020-10-23 18:45:24,552 INFO L226 Difference]: Without dead ends: 37 [2020-10-23 18:45:24,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 18:45:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-23 18:45:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-23 18:45:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-23 18:45:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-23 18:45:24,567 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2020-10-23 18:45:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:24,568 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-23 18:45:24,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-23 18:45:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-23 18:45:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:45:24,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:24,576 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:24,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:24,791 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:24,792 INFO L82 PathProgramCache]: Analyzing trace with hash -910228738, now seen corresponding path program 2 times [2020-10-23 18:45:24,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:24,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460266363] [2020-10-23 18:45:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:25,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:25,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460266363] [2020-10-23 18:45:25,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284926626] [2020-10-23 18:45:25,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-23 18:45:25,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:45:25,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:45:25,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-23 18:45:25,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:26,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:26,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2020-10-23 18:45:26,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222724483] [2020-10-23 18:45:26,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-23 18:45:26,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:26,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-23 18:45:26,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2020-10-23 18:45:26,596 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 32 states. [2020-10-23 18:45:27,053 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-23 18:45:28,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:28,528 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2020-10-23 18:45:28,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 18:45:28,528 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 33 [2020-10-23 18:45:28,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:28,530 INFO L225 Difference]: With dead ends: 62 [2020-10-23 18:45:28,530 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 18:45:28,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2020-10-23 18:45:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 18:45:28,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-10-23 18:45:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:45:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-23 18:45:28,541 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 33 [2020-10-23 18:45:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:28,542 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-23 18:45:28,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-23 18:45:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-23 18:45:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 18:45:28,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:28,543 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:28,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:45:28,757 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:28,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:28,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1026101115, now seen corresponding path program 3 times [2020-10-23 18:45:28,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:28,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541560146] [2020-10-23 18:45:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:28,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:28,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541560146] [2020-10-23 18:45:28,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257237128] [2020-10-23 18:45:28,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:29,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-23 18:45:29,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:45:29,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:45:29,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-23 18:45:29,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:29,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2020-10-23 18:45:29,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405792186] [2020-10-23 18:45:29,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:45:29,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:29,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:45:29,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:45:29,354 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 14 states. [2020-10-23 18:45:34,022 WARN L193 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-23 18:45:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:46,877 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-10-23 18:45:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 18:45:46,878 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-23 18:45:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:46,881 INFO L225 Difference]: With dead ends: 77 [2020-10-23 18:45:46,881 INFO L226 Difference]: Without dead ends: 66 [2020-10-23 18:45:46,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=100, Invalid=549, Unknown=1, NotChecked=0, Total=650 [2020-10-23 18:45:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-23 18:45:46,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-10-23 18:45:46,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-23 18:45:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-10-23 18:45:46,896 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 41 [2020-10-23 18:45:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:46,896 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-10-23 18:45:46,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:45:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-10-23 18:45:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 18:45:46,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:46,898 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:47,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:47,099 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:47,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1079394467, now seen corresponding path program 4 times [2020-10-23 18:45:47,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:47,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052605861] [2020-10-23 18:45:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:48,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:48,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052605861] [2020-10-23 18:45:48,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611401314] [2020-10-23 18:45:48,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:48,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:45:48,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:45:48,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-23 18:45:48,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:49,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:49,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:45:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:49,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:49,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2020-10-23 18:45:49,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877714661] [2020-10-23 18:45:49,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-23 18:45:49,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-23 18:45:49,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 18:45:49,788 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 38 states. [2020-10-23 18:45:52,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:52,442 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2020-10-23 18:45:52,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 18:45:52,446 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-10-23 18:45:52,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:52,447 INFO L225 Difference]: With dead ends: 96 [2020-10-23 18:45:52,447 INFO L226 Difference]: Without dead ends: 66 [2020-10-23 18:45:52,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=258, Invalid=3048, Unknown=0, NotChecked=0, Total=3306 [2020-10-23 18:45:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-23 18:45:52,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-23 18:45:52,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 18:45:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-10-23 18:45:52,459 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 42 [2020-10-23 18:45:52,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:52,460 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-10-23 18:45:52,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-23 18:45:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-10-23 18:45:52,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-23 18:45:52,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:52,461 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:52,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:52,670 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:52,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:52,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1974132196, now seen corresponding path program 5 times [2020-10-23 18:45:52,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:52,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167052454] [2020-10-23 18:45:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:54,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:54,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167052454] [2020-10-23 18:45:54,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963094572] [2020-10-23 18:45:54,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true