/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/divbin2_valuebound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:04:14,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:04:14,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:04:14,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:04:14,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:04:14,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:04:14,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:04:14,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:04:14,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:04:14,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:04:14,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:04:14,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:04:14,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:04:14,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:04:14,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:04:14,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:04:14,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:04:14,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:04:14,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:04:14,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:04:14,879 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 [2021-05-06 02:04:14,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:04:14,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:04:14,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:04:14,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:04:14,924 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:04:14,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:04:14,925 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:04:14,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:04:14,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:04:14,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:04:14,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:04:14,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:04:14,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:04:14,926 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:04:14,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:04:14,927 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:04:14,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:04:14,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:04:14,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:04:14,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:04:14,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:04:14,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:04:14,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:04:14,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:04:14,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:04:14,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:04:14,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:04:14,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:04:14,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:04:15,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:04:15,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:04:15,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:04:15,338 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:04:15,339 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:04:15,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound20.i [2021-05-06 02:04:15,409 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/157ab2e59/7e6697f903d14980b38f92ce09a8e9fd/FLAG77f252373 [2021-05-06 02:04:15,840 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:04:15,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound20.i [2021-05-06 02:04:15,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/157ab2e59/7e6697f903d14980b38f92ce09a8e9fd/FLAG77f252373 [2021-05-06 02:04:16,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/157ab2e59/7e6697f903d14980b38f92ce09a8e9fd [2021-05-06 02:04:16,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:04:16,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:04:16,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:04:16,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:04:16,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:04:16,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:04:16" (1/1) ... [2021-05-06 02:04:16,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@237a2ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:04:16, skipping insertion in model container [2021-05-06 02:04:16,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:04:16" (1/1) ... [2021-05-06 02:04:16,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:04:16,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:04:16,403 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/divbin2_valuebound20.i[959,972] [2021-05-06 02:04:16,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:04:16,428 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:04:16,480 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/divbin2_valuebound20.i[959,972] [2021-05-06 02:04:16,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:04:16,525 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:04:16,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:04:16 WrapperNode [2021-05-06 02:04:16,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:04:16,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:04:16,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:04:16,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:04:16,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:04:16" (1/1) ... [2021-05-06 02:04:16,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:04:16" (1/1) ... [2021-05-06 02:04:16,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:04:16" (1/1) ... [2021-05-06 02:04:16,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:04:16" (1/1) ... [2021-05-06 02:04:16,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:04:16" (1/1) ... [2021-05-06 02:04:16,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:04:16" (1/1) ... [2021-05-06 02:04:16,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:04:16" (1/1) ... [2021-05-06 02:04:16,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:04:16,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:04:16,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:04:16,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:04:16,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:04:16" (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 [2021-05-06 02:04:16,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:04:16,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:04:16,624 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:04:16,624 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:04:16,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:04:16,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:04:16,625 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:04:16,625 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:04:16,625 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 02:04:16,625 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 02:04:16,625 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:04:16,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:04:16,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 02:04:16,625 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:04:16,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:04:16,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:04:16,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:04:16,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:04:16,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:04:16,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:04:16,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:04:16,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:04:16,809 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:04:16,809 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 02:04:16,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:04:16 BoogieIcfgContainer [2021-05-06 02:04:16,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:04:16,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:04:16,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:04:16,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:04:16,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:04:16" (1/3) ... [2021-05-06 02:04:16,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4abf62ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:04:16, skipping insertion in model container [2021-05-06 02:04:16,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:04:16" (2/3) ... [2021-05-06 02:04:16,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4abf62ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:04:16, skipping insertion in model container [2021-05-06 02:04:16,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:04:16" (3/3) ... [2021-05-06 02:04:16,818 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound20.i [2021-05-06 02:04:16,823 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:04:16,826 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:04:16,842 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:04:16,860 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:04:16,861 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:04:16,861 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:04:16,861 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:04:16,861 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:04:16,861 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:04:16,861 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:04:16,861 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:04:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:04:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 02:04:16,879 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:04:16,880 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:04:16,880 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:04:16,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:04:16,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1171333446, now seen corresponding path program 1 times [2021-05-06 02:04:16,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:04:16,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873728972] [2021-05-06 02:04:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:04:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:04:17,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:04:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:04:17,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:04:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:04:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:04:17,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:04:17,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873728972] [2021-05-06 02:04:17,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873728972] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:04:17,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:04:17,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:04:17,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699491767] [2021-05-06 02:04:17,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:04:17,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:04:17,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:04:17,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:04:17,245 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 02:04:17,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:04:17,323 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2021-05-06 02:04:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:04:17,325 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 02:04:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:04:17,332 INFO L225 Difference]: With dead ends: 51 [2021-05-06 02:04:17,332 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 02:04:17,336 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:04:17,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 02:04:17,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 02:04:17,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:04:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 02:04:17,380 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-05-06 02:04:17,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:04:17,380 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 02:04:17,381 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 02:04:17,381 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 02:04:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 02:04:17,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:04:17,382 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:04:17,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:04:17,383 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:04:17,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:04:17,384 INFO L82 PathProgramCache]: Analyzing trace with hash -73515422, now seen corresponding path program 1 times [2021-05-06 02:04:17,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:04:17,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861479494] [2021-05-06 02:04:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:04:17,419 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:04:17,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485395265] [2021-05-06 02:04:17,419 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 [2021-05-06 02:04:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:04:17,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:04:17,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:04:17,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:04:17,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:04:17,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:04:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:04:17,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:04:17,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861479494] [2021-05-06 02:04:17,739 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:04:17,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485395265] [2021-05-06 02:04:17,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485395265] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:04:17,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:04:17,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 02:04:17,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440735007] [2021-05-06 02:04:17,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:04:17,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:04:17,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:04:17,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:04:17,742 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 02:04:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:04:17,822 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-06 02:04:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:04:17,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-05-06 02:04:17,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:04:17,825 INFO L225 Difference]: With dead ends: 37 [2021-05-06 02:04:17,825 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 02:04:17,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:04:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 02:04:17,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 02:04:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:04:17,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-06 02:04:17,833 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2021-05-06 02:04:17,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:04:17,833 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-06 02:04:17,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 02:04:17,834 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-06 02:04:17,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 02:04:17,834 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:04:17,835 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:04:18,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:04:18,036 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:04:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:04:18,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1211706883, now seen corresponding path program 1 times [2021-05-06 02:04:18,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:04:18,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244965726] [2021-05-06 02:04:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:04:18,047 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:04:18,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733876988] [2021-05-06 02:04:18,048 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 [2021-05-06 02:04:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:04:18,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:04:18,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:04:18,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:04:18,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:04:18,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:04:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:04:18,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:04:18,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244965726] [2021-05-06 02:04:18,313 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:04:18,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733876988] [2021-05-06 02:04:18,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733876988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:04:18,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:04:18,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:04:18,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774468110] [2021-05-06 02:04:18,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:04:18,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:04:18,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:04:18,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:04:18,316 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 02:04:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:04:18,455 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-05-06 02:04:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:04:18,456 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-05-06 02:04:18,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:04:18,457 INFO L225 Difference]: With dead ends: 45 [2021-05-06 02:04:18,457 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 02:04:18,457 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:04:18,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 02:04:18,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 02:04:18,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:04:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-06 02:04:18,466 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-05-06 02:04:18,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:04:18,466 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-06 02:04:18,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 02:04:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-06 02:04:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 02:04:18,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:04:18,467 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, 1, 1, 1] [2021-05-06 02:04:18,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:04:18,693 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:04:18,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:04:18,693 INFO L82 PathProgramCache]: Analyzing trace with hash 947727214, now seen corresponding path program 1 times [2021-05-06 02:04:18,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:04:18,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568530895] [2021-05-06 02:04:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:04:18,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:04:18,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348581626] [2021-05-06 02:04:18,706 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 [2021-05-06 02:04:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:04:18,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:04:18,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:04:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:04:18,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:04:18,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568530895] [2021-05-06 02:04:18,837 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:04:18,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348581626] [2021-05-06 02:04:18,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348581626] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:04:18,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:04:18,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:04:18,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538718732] [2021-05-06 02:04:18,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:04:18,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:04:18,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:04:18,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:04:18,839 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:04:18,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:04:18,864 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-05-06 02:04:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:04:18,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-06 02:04:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:04:18,866 INFO L225 Difference]: With dead ends: 53 [2021-05-06 02:04:18,866 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:04:18,873 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:04:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:04:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:04:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:04:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-06 02:04:18,887 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2021-05-06 02:04:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:04:18,887 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-06 02:04:18,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:04:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-06 02:04:18,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 02:04:18,891 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:04:18,891 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] [2021-05-06 02:04:19,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:04:19,118 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:04:19,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:04:19,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1574040585, now seen corresponding path program 1 times [2021-05-06 02:04:19,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:04:19,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660747679] [2021-05-06 02:04:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:04:19,129 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:04:19,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643761403] [2021-05-06 02:04:19,129 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