/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:20:53,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:20:53,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:20:53,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:20:53,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:20:53,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:20:53,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:20:53,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:20:53,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:20:53,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:20:53,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:20:53,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:20:53,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:20:53,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:20:53,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:20:53,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:20:53,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:20:53,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:20:53,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:20:53,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:20:53,825 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 [2021-05-02 15:20:53,867 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:20:53,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:20:53,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:20:53,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:20:53,869 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:20:53,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:20:53,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:20:53,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:20:53,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:20:53,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:20:53,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:20:53,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:20:53,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:20:53,870 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:20:53,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:20:53,870 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:20:53,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:20:53,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:20:53,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:20:53,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:20:53,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:20:53,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:20:53,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:20:53,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:20:53,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:20:53,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:20:53,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:20:53,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:20:53,872 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:20:54,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:20:54,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:20:54,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:20:54,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:20:54,191 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:20:54,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound50.c [2021-05-02 15:20:54,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95f009e2f/df2a541812be4acfbe9cc07f6bd40b64/FLAG2c10dd320 [2021-05-02 15:20:54,637 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:20:54,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound50.c [2021-05-02 15:20:54,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95f009e2f/df2a541812be4acfbe9cc07f6bd40b64/FLAG2c10dd320 [2021-05-02 15:20:55,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95f009e2f/df2a541812be4acfbe9cc07f6bd40b64 [2021-05-02 15:20:55,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:20:55,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:20:55,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:20:55,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:20:55,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:20:55,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:20:55" (1/1) ... [2021-05-02 15:20:55,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18c784da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:55, skipping insertion in model container [2021-05-02 15:20:55,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:20:55" (1/1) ... [2021-05-02 15:20:55,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:20:55,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:20:55,229 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound50.c[546,559] [2021-05-02 15:20:55,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:20:55,251 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:20:55,265 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound50.c[546,559] [2021-05-02 15:20:55,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:20:55,295 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:20:55,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:55 WrapperNode [2021-05-02 15:20:55,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:20:55,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:20:55,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:20:55,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:20:55,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:55" (1/1) ... [2021-05-02 15:20:55,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:55" (1/1) ... [2021-05-02 15:20:55,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:55" (1/1) ... [2021-05-02 15:20:55,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:55" (1/1) ... [2021-05-02 15:20:55,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:55" (1/1) ... [2021-05-02 15:20:55,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:55" (1/1) ... [2021-05-02 15:20:55,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:55" (1/1) ... [2021-05-02 15:20:55,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:20:55,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:20:55,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:20:55,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:20:55,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:55" (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 [2021-05-02 15:20:55,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:20:55,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:20:55,441 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:20:55,441 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:20:55,441 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:20:55,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:20:55,442 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:20:55,442 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:20:55,442 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:20:55,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:20:55,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:20:55,443 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:20:55,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:20:55,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:20:55,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:20:55,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:20:55,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:20:55,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:20:55,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:20:55,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:20:55,698 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:20:55,698 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:20:55,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:20:55 BoogieIcfgContainer [2021-05-02 15:20:55,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:20:55,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:20:55,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:20:55,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:20:55,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:20:55" (1/3) ... [2021-05-02 15:20:55,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a2e811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:20:55, skipping insertion in model container [2021-05-02 15:20:55,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:55" (2/3) ... [2021-05-02 15:20:55,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a2e811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:20:55, skipping insertion in model container [2021-05-02 15:20:55,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:20:55" (3/3) ... [2021-05-02 15:20:55,705 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound50.c [2021-05-02 15:20:55,709 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:20:55,712 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:20:55,726 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:20:55,743 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:20:55,743 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:20:55,743 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:20:55,743 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:20:55,743 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:20:55,743 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:20:55,743 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:20:55,743 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:20:55,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:20:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:20:55,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:55,760 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:55,760 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:55,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:55,764 INFO L82 PathProgramCache]: Analyzing trace with hash 730417173, now seen corresponding path program 1 times [2021-05-02 15:20:55,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:55,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025799026] [2021-05-02 15:20:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:55,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:20:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:55,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:20:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:55,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 15:20:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:20:56,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:56,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025799026] [2021-05-02 15:20:56,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025799026] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:20:56,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:20:56,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:20:56,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29900423] [2021-05-02 15:20:56,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:20:56,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:56,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:20:56,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:20:56,030 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:20:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:56,172 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2021-05-02 15:20:56,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:20:56,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:20:56,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:56,181 INFO L225 Difference]: With dead ends: 54 [2021-05-02 15:20:56,181 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 15:20:56,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:20:56,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 15:20:56,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 15:20:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:20:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 15:20:56,232 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2021-05-02 15:20:56,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:56,232 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 15:20:56,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:20:56,233 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 15:20:56,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:20:56,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:56,234 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:56,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:20:56,235 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:56,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:56,241 INFO L82 PathProgramCache]: Analyzing trace with hash -942473515, now seen corresponding path program 1 times [2021-05-02 15:20:56,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:56,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525686553] [2021-05-02 15:20:56,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:56,258 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:56,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361658313] [2021-05-02 15:20:56,258 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 [2021-05-02 15:20:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:56,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:20:56,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:56,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:56,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:56,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:56,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:20:56,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:56,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525686553] [2021-05-02 15:20:56,476 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:56,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361658313] [2021-05-02 15:20:56,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361658313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:56,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:56,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:20:56,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798513864] [2021-05-02 15:20:56,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:20:56,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:56,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:20:56,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:20:56,483 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:20:56,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:56,583 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-02 15:20:56,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:20:56,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:20:56,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:56,585 INFO L225 Difference]: With dead ends: 36 [2021-05-02 15:20:56,585 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 15:20:56,586 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:20:56,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 15:20:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 15:20:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:20:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 15:20:56,593 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 15:20:56,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:56,594 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 15:20:56,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:20:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 15:20:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 15:20:56,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:56,595 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:56,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:20:56,817 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:56,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:56,818 INFO L82 PathProgramCache]: Analyzing trace with hash 769172850, now seen corresponding path program 1 times [2021-05-02 15:20:56,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:56,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687427807] [2021-05-02 15:20:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:56,831 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:56,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820021693] [2021-05-02 15:20:56,831 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 [2021-05-02 15:20:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:56,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:20:56,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:56,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:56,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:56,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:56,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:56,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:20:56,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:56,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687427807] [2021-05-02 15:20:56,962 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:56,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820021693] [2021-05-02 15:20:56,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820021693] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:20:56,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:20:56,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:20:56,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753794555] [2021-05-02 15:20:56,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:20:56,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:56,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:20:56,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:20:56,964 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:20:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:56,975 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-05-02 15:20:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:20:56,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 15:20:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:56,977 INFO L225 Difference]: With dead ends: 40 [2021-05-02 15:20:56,978 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:20:56,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:20:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:20:56,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:20:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:20:56,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 15:20:56,985 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2021-05-02 15:20:56,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:56,985 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 15:20:56,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:20:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 15:20:56,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 15:20:56,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:56,986 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:57,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:57,195 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:57,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:57,196 INFO L82 PathProgramCache]: Analyzing trace with hash 431121724, now seen corresponding path program 1 times [2021-05-02 15:20:57,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:57,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775976502] [2021-05-02 15:20:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:57,209 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:57,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395974887] [2021-05-02 15:20:57,210 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 [2021-05-02 15:20:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:57,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:20:57,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:57,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:20:57,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:57,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775976502] [2021-05-02 15:20:57,486 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:57,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395974887] [2021-05-02 15:20:57,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395974887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:57,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:57,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:20:57,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127790818] [2021-05-02 15:20:57,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:20:57,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:57,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:20:57,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:20:57,490 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:20:59,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:59,685 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-05-02 15:20:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:20:59,686 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 15:20:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:59,687 INFO L225 Difference]: With dead ends: 40 [2021-05-02 15:20:59,687 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:20:59,688 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:20:59,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:20:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:20:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:20:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-02 15:20:59,694 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 30 [2021-05-02 15:20:59,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:59,694 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-02 15:20:59,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:20:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-02 15:20:59,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 15:20:59,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:59,695 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:59,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:59,915 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:59,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1792638864, now seen corresponding path program 1 times [2021-05-02 15:20:59,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:59,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32967080] [2021-05-02 15:20:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:59,927 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:59,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518751640] [2021-05-02 15:20:59,928 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 [2021-05-02 15:20:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:59,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:21:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:00,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:21:00,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:00,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32967080] [2021-05-02 15:21:00,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:00,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518751640] [2021-05-02 15:21:00,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518751640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:00,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:00,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:21:00,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327374253] [2021-05-02 15:21:00,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:21:00,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:00,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:21:00,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:21:00,165 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:21:00,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:00,280 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-02 15:21:00,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:21:00,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-05-02 15:21:00,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:00,283 INFO L225 Difference]: With dead ends: 44 [2021-05-02 15:21:00,284 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 15:21:00,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:21:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 15:21:00,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 15:21:00,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:21:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-05-02 15:21:00,301 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 31 [2021-05-02 15:21:00,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:00,302 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-05-02 15:21:00,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:21:00,302 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-05-02 15:21:00,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 15:21:00,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:00,303 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:00,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:00,525 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:00,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:00,525 INFO L82 PathProgramCache]: Analyzing trace with hash -341689321, now seen corresponding path program 1 times [2021-05-02 15:21:00,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:00,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807572507] [2021-05-02 15:21:00,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:00,535 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:00,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204403390] [2021-05-02 15:21:00,535 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 [2021-05-02 15:21:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:00,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:21:00,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:00,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:21:00,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:00,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807572507] [2021-05-02 15:21:00,690 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:00,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204403390] [2021-05-02 15:21:00,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204403390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:00,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:00,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:21:00,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16715230] [2021-05-02 15:21:00,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:21:00,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:00,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:21:00,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:21:00,691 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:21:00,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:00,733 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-05-02 15:21:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:21:00,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 15:21:00,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:00,735 INFO L225 Difference]: With dead ends: 48 [2021-05-02 15:21:00,735 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 15:21:00,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:21:00,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 15:21:00,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 15:21:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 28 states have internal predecessors, (28), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:21:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 15:21:00,752 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2021-05-02 15:21:00,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:00,753 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 15:21:00,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:21:00,753 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 15:21:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:21:00,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:00,756 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:00,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:21:00,975 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:00,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:00,975 INFO L82 PathProgramCache]: Analyzing trace with hash 761075019, now seen corresponding path program 2 times [2021-05-02 15:21:00,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:00,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273150384] [2021-05-02 15:21:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:00,993 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:00,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385023174] [2021-05-02 15:21:00,994 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:01,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:21:01,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:21:01,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 15:21:01,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:01,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:01,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:01,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:01,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:01,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:01,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:01,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:01,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:01,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:01,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:07,281 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 18 [2021-05-02 15:21:07,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:07,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:07,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:07,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 15:21:07,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:07,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273150384] [2021-05-02 15:21:07,349 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:07,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385023174] [2021-05-02 15:21:07,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385023174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:07,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:07,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:21:07,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061719558] [2021-05-02 15:21:07,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:21:07,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:07,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:21:07,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2021-05-02 15:21:07,351 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:21:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:20,409 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-05-02 15:21:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:21:20,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-05-02 15:21:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:20,410 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:21:20,411 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 15:21:20,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 6202.6ms TimeCoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2021-05-02 15:21:20,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 15:21:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-05-02 15:21:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:21:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-05-02 15:21:20,417 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 39 [2021-05-02 15:21:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:20,418 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-05-02 15:21:20,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:21:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-05-02 15:21:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 15:21:20,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:20,419 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:20,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:20,625 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:20,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:20,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2039569852, now seen corresponding path program 2 times [2021-05-02 15:21:20,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:20,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848050961] [2021-05-02 15:21:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:20,635 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:20,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845132658] [2021-05-02 15:21:20,635 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:20,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:21:20,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:21:20,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:21:20,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:20,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:20,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:20,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:20,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:20,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:20,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:20,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:20,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:20,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:20,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:20,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:21:20,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:20,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848050961] [2021-05-02 15:21:20,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:20,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845132658] [2021-05-02 15:21:20,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845132658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:20,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:20,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:21:20,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29321831] [2021-05-02 15:21:20,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:21:20,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:20,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:21:20,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:21:20,834 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:21:20,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:20,887 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-05-02 15:21:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:21:20,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 40 [2021-05-02 15:21:20,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:20,889 INFO L225 Difference]: With dead ends: 56 [2021-05-02 15:21:20,890 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:21:20,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:21:20,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:21:20,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 15:21:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.0625) internal successors, (34), 34 states have internal predecessors, (34), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:21:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-05-02 15:21:20,901 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 40 [2021-05-02 15:21:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:20,901 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-05-02 15:21:20,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:21:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-05-02 15:21:20,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:21:20,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:20,903 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:21,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:21,125 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:21,125 INFO L82 PathProgramCache]: Analyzing trace with hash -545734650, now seen corresponding path program 3 times [2021-05-02 15:21:21,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:21,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372296288] [2021-05-02 15:21:21,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:21,136 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:21,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101599602] [2021-05-02 15:21:21,137 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 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 [2021-05-02 15:21:21,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:21:21,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:21:21,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:21:21,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:21,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:21,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:21,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:21,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:21,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:21,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:21,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:21,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:21,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:23,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:23,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:23,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:23,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:23,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:23,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:23,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:23,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:23,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:23,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:25,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:25,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:25,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:25,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-05-02 15:21:27,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:27,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372296288] [2021-05-02 15:21:27,617 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:27,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101599602] [2021-05-02 15:21:27,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101599602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:27,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:27,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:21:27,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681836823] [2021-05-02 15:21:27,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:21:27,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:27,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:21:27,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:21:27,619 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:21:41,315 WARN L205 SmtUtils]: Spent 13.68 s on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-02 15:21:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:43,517 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-05-02 15:21:43,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:21:43,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-02 15:21:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:43,518 INFO L225 Difference]: With dead ends: 48 [2021-05-02 15:21:43,518 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:21:43,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 13854.5ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:21:43,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:21:43,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:21:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-05-02 15:21:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:21:43,519 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-05-02 15:21:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:43,519 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:21:43,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:21:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:21:43,519 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:21:43,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 15:21:43,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:21:44,075 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 9) no Hoare annotation was computed. [2021-05-02 15:21:44,075 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 9) no Hoare annotation was computed. [2021-05-02 15:21:44,075 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 9) no Hoare annotation was computed. [2021-05-02 15:21:44,075 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:21:44,076 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 15:21:44,076 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:21:44,076 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:21:44,076 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-02 15:21:44,076 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:21:44,076 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:21:44,076 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 12 14) the Hoare annotation is: true [2021-05-02 15:21:44,076 INFO L198 CegarLoopUtils]: For program point L13(line 13) no Hoare annotation was computed. [2021-05-02 15:21:44,076 INFO L198 CegarLoopUtils]: For program point L13-2(lines 12 14) no Hoare annotation was computed. [2021-05-02 15:21:44,076 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 12 14) no Hoare annotation was computed. [2021-05-02 15:21:44,076 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 45) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (let ((.cse0 (+ main_~x~0 (- 1)))) (and (<= 1 main_~k~0) (= (mod .cse0 main_~z~0) 0) (let ((.cse1 (div .cse0 main_~z~0))) (= (+ main_~y~0 (* main_~z~0 .cse1)) (+ main_~z~0 (* main_~z~0 main_~z~0 .cse1)))) (<= 1 main_~z~0)))) [2021-05-02 15:21:44,076 INFO L198 CegarLoopUtils]: For program point L35-4(lines 35 45) no Hoare annotation was computed. [2021-05-02 15:21:44,077 INFO L198 CegarLoopUtils]: For program point L29(line 29) no Hoare annotation was computed. [2021-05-02 15:21:44,077 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 23 51) no Hoare annotation was computed. [2021-05-02 15:21:44,077 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 23 51) no Hoare annotation was computed. [2021-05-02 15:21:44,077 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (let ((.cse0 (+ main_~x~0 (- 1)))) (and (<= 1 main_~k~0) (= (mod .cse0 main_~z~0) 0) (let ((.cse1 (div .cse0 main_~z~0))) (= (+ main_~y~0 (* main_~z~0 .cse1)) (+ main_~z~0 (* main_~z~0 main_~z~0 .cse1)))) (<= 1 main_~z~0)))) [2021-05-02 15:21:44,077 INFO L198 CegarLoopUtils]: For program point L36-1(lines 35 45) no Hoare annotation was computed. [2021-05-02 15:21:44,077 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 23 51) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 15:21:44,077 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 15:21:44,077 INFO L194 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~z~0) (= ~counter~0 |old(~counter~0)|))) [2021-05-02 15:21:44,077 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (<= 1 main_~z~0))) (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~k~0) .cse0) (and (exists ((v_main_~x~0_11 Int) (main_~z~0 Int)) (let ((.cse1 (* v_main_~x~0_11 main_~z~0))) (and (<= 1 main_~z~0) (= .cse1 (+ v_main_~x~0_11 main_~x~0)) (= (+ .cse1 1) (+ v_main_~x~0_11 main_~y~0))))) .cse0))) [2021-05-02 15:21:44,077 INFO L198 CegarLoopUtils]: For program point L49-1(line 49) no Hoare annotation was computed. [2021-05-02 15:21:44,077 INFO L198 CegarLoopUtils]: For program point L35-1(lines 35 45) no Hoare annotation was computed. [2021-05-02 15:21:44,078 INFO L198 CegarLoopUtils]: For program point L17(lines 17 18) no Hoare annotation was computed. [2021-05-02 15:21:44,078 INFO L198 CegarLoopUtils]: For program point L16(lines 16 19) no Hoare annotation was computed. [2021-05-02 15:21:44,078 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 15 21) the Hoare annotation is: true [2021-05-02 15:21:44,078 INFO L198 CegarLoopUtils]: For program point L16-2(lines 15 21) no Hoare annotation was computed. [2021-05-02 15:21:44,078 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 15 21) no Hoare annotation was computed. [2021-05-02 15:21:44,078 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-05-02 15:21:44,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:21:44 BoogieIcfgContainer [2021-05-02 15:21:44,090 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:21:44,090 INFO L168 Benchmark]: Toolchain (without parser) took 49023.24 ms. Allocated memory is still 210.8 MB. Free memory was 174.8 MB in the beginning and 160.7 MB in the end (delta: 14.1 MB). Peak memory consumption was 103.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:44,090 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 210.8 MB. Free memory was 191.6 MB in the beginning and 191.5 MB in the end (delta: 106.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:21:44,091 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.01 ms. Allocated memory is still 210.8 MB. Free memory was 174.6 MB in the beginning and 164.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:44,091 INFO L168 Benchmark]: Boogie Preprocessor took 65.36 ms. Allocated memory is still 210.8 MB. Free memory was 164.9 MB in the beginning and 193.8 MB in the end (delta: -28.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:44,091 INFO L168 Benchmark]: RCFGBuilder took 335.70 ms. Allocated memory is still 210.8 MB. Free memory was 193.8 MB in the beginning and 178.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:44,091 INFO L168 Benchmark]: TraceAbstraction took 48389.14 ms. Allocated memory is still 210.8 MB. Free memory was 177.6 MB in the beginning and 160.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 107.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:44,091 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 210.8 MB. Free memory was 191.6 MB in the beginning and 191.5 MB in the end (delta: 106.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 226.01 ms. Allocated memory is still 210.8 MB. Free memory was 174.6 MB in the beginning and 164.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 65.36 ms. Allocated memory is still 210.8 MB. Free memory was 164.9 MB in the beginning and 193.8 MB in the end (delta: -28.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 335.70 ms. Allocated memory is still 210.8 MB. Free memory was 193.8 MB in the beginning and 178.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 48389.14 ms. Allocated memory is still 210.8 MB. Free memory was 177.6 MB in the beginning and 160.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 107.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 47980.3ms, OverallIterations: 9, TraceHistogramMax: 4, EmptinessCheckTime: 16.5ms, AutomataDifference: 31664.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 353.4ms, InitialAbstractionConstructionTime: 8.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 213 SDtfs, 126 SDslu, 793 SDs, 0 SdLazy, 474 SolverSat, 50 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 17301.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 288 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 20415.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=7, InterpolantAutomatonStates: 70, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 106.1ms AutomataMinimizationTime, 9 MinimizatonAttempts, 7 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 23 PreInvPairs, 34 NumberOfFragments, 183 HoareAnnotationTreeSize, 23 FomulaSimplifications, 78 FormulaSimplificationTreeSizeReduction, 79.6ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 726 FormulaSimplificationTreeSizeReductionInter, 264.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 113.1ms SsaConstructionTime, 244.3ms SatisfiabilityAnalysisTime, 13607.4ms InterpolantComputationTime, 289 NumberOfCodeBlocks, 273 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 280 ConstructedInterpolants, 1 QuantifiedInterpolants, 1002 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1181 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 84/120 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || (((1 <= k && (x + -1) % z == 0) && y + z * ((x + -1) / z) == z + z * z * ((x + -1) / z)) && 1 <= z) RESULT: Ultimate proved your program to be correct! Received shutdown request...