/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/divbin_valuebound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:43:40,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:43:40,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:43:40,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:43:40,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:43:40,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:43:40,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:43:40,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:43:40,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:43:40,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:43:40,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:43:40,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:43:40,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:43:40,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:43:40,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:43:40,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:43:40,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:43:40,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:43:40,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:43:40,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:43:40,374 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 14:43:40,401 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:43:40,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:43:40,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:43:40,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:43:40,403 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:43:40,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:43:40,404 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:43:40,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:43:40,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:43:40,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:43:40,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:43:40,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:43:40,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:43:40,405 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:43:40,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:43:40,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:43:40,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:43:40,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:43:40,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:43:40,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:43:40,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:43:40,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:43:40,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:43:40,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:43:40,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:43:40,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:43:40,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:43:40,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:43:40,407 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:43:40,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:43:40,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:43:40,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:43:40,648 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:43:40,648 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:43:40,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound50.i [2021-05-02 14:43:40,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79a4364cc/4c4fe3dac92740ccb5d441afd674c3a4/FLAGb5a491a4d [2021-05-02 14:43:41,000 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:43:41,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound50.i [2021-05-02 14:43:41,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79a4364cc/4c4fe3dac92740ccb5d441afd674c3a4/FLAGb5a491a4d [2021-05-02 14:43:41,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79a4364cc/4c4fe3dac92740ccb5d441afd674c3a4 [2021-05-02 14:43:41,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:43:41,422 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:43:41,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:43:41,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:43:41,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:43:41,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:43:41" (1/1) ... [2021-05-02 14:43:41,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a0425c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:41, skipping insertion in model container [2021-05-02 14:43:41,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:43:41" (1/1) ... [2021-05-02 14:43:41,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:43:41,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:43:41,523 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/divbin_valuebound50.i[958,971] [2021-05-02 14:43:41,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:43:41,535 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:43:41,543 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/divbin_valuebound50.i[958,971] [2021-05-02 14:43:41,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:43:41,555 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:43:41,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:41 WrapperNode [2021-05-02 14:43:41,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:43:41,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:43:41,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:43:41,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:43:41,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:41" (1/1) ... [2021-05-02 14:43:41,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:41" (1/1) ... [2021-05-02 14:43:41,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:41" (1/1) ... [2021-05-02 14:43:41,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:41" (1/1) ... [2021-05-02 14:43:41,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:41" (1/1) ... [2021-05-02 14:43:41,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:41" (1/1) ... [2021-05-02 14:43:41,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:41" (1/1) ... [2021-05-02 14:43:41,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:43:41,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:43:41,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:43:41,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:43:41,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:41" (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 14:43:41,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:43:41,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:43:41,666 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:43:41,666 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:43:41,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:43:41,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:43:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:43:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:43:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 14:43:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 14:43:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:43:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:43:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 14:43:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:43:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:43:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:43:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:43:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:43:41,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:43:41,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:43:41,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:43:41,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:43:41,883 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:43:41,883 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:43:41,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:43:41 BoogieIcfgContainer [2021-05-02 14:43:41,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:43:41,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:43:41,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:43:41,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:43:41,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:43:41" (1/3) ... [2021-05-02 14:43:41,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191ea507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:43:41, skipping insertion in model container [2021-05-02 14:43:41,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:43:41" (2/3) ... [2021-05-02 14:43:41,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191ea507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:43:41, skipping insertion in model container [2021-05-02 14:43:41,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:43:41" (3/3) ... [2021-05-02 14:43:41,888 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound50.i [2021-05-02 14:43:41,892 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:43:41,894 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:43:41,904 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:43:41,918 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:43:41,918 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:43:41,918 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:43:41,918 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:43:41,918 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:43:41,918 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:43:41,918 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:43:41,918 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:43:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:43:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:43:41,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:43:41,932 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 14:43:41,932 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:43:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:43:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash 291922115, now seen corresponding path program 1 times [2021-05-02 14:43:41,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:43:41,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858571437] [2021-05-02 14:43:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:43:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:42,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:43:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:42,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:43:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:42,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:43:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:42,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:43:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:42,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:43:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:43:42,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:43:42,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858571437] [2021-05-02 14:43:42,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858571437] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:43:42,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:43:42,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:43:42,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27257424] [2021-05-02 14:43:42,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:43:42,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:43:42,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:43:42,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:43:42,126 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:43:42,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:43:42,209 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2021-05-02 14:43:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:43:42,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 14:43:42,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:43:42,215 INFO L225 Difference]: With dead ends: 61 [2021-05-02 14:43:42,215 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 14:43:42,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:43:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 14:43:42,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 14:43:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:43:42,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 14:43:42,244 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-02 14:43:42,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:43:42,244 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 14:43:42,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:43:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 14:43:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 14:43:42,246 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:43:42,246 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 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 14:43:42,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:43:42,247 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:43:42,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:43:42,247 INFO L82 PathProgramCache]: Analyzing trace with hash -245963777, now seen corresponding path program 1 times [2021-05-02 14:43:42,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:43:42,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691940869] [2021-05-02 14:43:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:43:42,261 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:43:42,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784740212] [2021-05-02 14:43:42,262 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 14:43:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:42,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:43:42,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:43:42,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:42,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:42,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:42,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:42,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:42,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:42,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:42,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:42,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:42,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:42,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:42,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:43:42,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:43:42,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691940869] [2021-05-02 14:43:42,638 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:43:42,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784740212] [2021-05-02 14:43:42,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784740212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:43:42,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:43:42,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:43:42,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110229405] [2021-05-02 14:43:42,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:43:42,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:43:42,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:43:42,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:43:42,640 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:43:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:43:42,868 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-02 14:43:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:43:42,873 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-02 14:43:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:43:42,874 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:43:42,874 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 14:43:42,875 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:43:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 14:43:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-02 14:43:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:43:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-02 14:43:42,882 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-02 14:43:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:43:42,883 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-02 14:43:42,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:43:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-02 14:43:42,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 14:43:42,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:43:42,884 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 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 14:43:43,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:43:43,101 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:43:43,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:43:43,101 INFO L82 PathProgramCache]: Analyzing trace with hash 397552474, now seen corresponding path program 1 times [2021-05-02 14:43:43,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:43:43,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31291924] [2021-05-02 14:43:43,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:43:43,112 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:43:43,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780094286] [2021-05-02 14:43:43,113 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 14:43:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:43,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:43:43,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:43:43,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:43,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:43,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:43,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:43,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:43,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:43,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:43,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:43,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:43,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:43:43,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:43:43,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31291924] [2021-05-02 14:43:43,393 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:43:43,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780094286] [2021-05-02 14:43:43,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780094286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:43:43,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:43:43,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:43:43,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703494480] [2021-05-02 14:43:43,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:43:43,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:43:43,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:43:43,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:43:43,394 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:43:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:43:43,562 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 14:43:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:43:43,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-02 14:43:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:43:43,567 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:43:43,567 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:43:43,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:43:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:43:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-05-02 14:43:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:43:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 14:43:43,585 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 37 [2021-05-02 14:43:43,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:43:43,586 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 14:43:43,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:43:43,586 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 14:43:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:43:43,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:43:43,588 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2021-05-02 14:43:43,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:43:43,797 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:43:43,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:43:43,797 INFO L82 PathProgramCache]: Analyzing trace with hash -382866049, now seen corresponding path program 1 times [2021-05-02 14:43:43,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:43:43,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120720075] [2021-05-02 14:43:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:43:43,813 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:43:43,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029556169] [2021-05-02 14:43:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:43:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:43,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 14:43:43,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:43:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:43:43,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:43:43,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120720075] [2021-05-02 14:43:43,950 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:43:43,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029556169] [2021-05-02 14:43:43,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029556169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:43:43,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:43:43,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:43:43,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472400493] [2021-05-02 14:43:43,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:43:43,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:43:43,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:43:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:43:43,953 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:43:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:43:43,972 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-05-02 14:43:43,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:43:43,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-05-02 14:43:43,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:43:43,975 INFO L225 Difference]: With dead ends: 61 [2021-05-02 14:43:43,975 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 14:43:43,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:43:43,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 14:43:43,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 14:43:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:43:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-05-02 14:43:43,989 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 43 [2021-05-02 14:43:43,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:43:43,992 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-05-02 14:43:43,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:43:43,992 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-05-02 14:43:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 14:43:43,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:43:43,993 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2021-05-02 14:43:44,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:43:44,194 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:43:44,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:43:44,195 INFO L82 PathProgramCache]: Analyzing trace with hash 866494938, now seen corresponding path program 1 times [2021-05-02 14:43:44,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:43:44,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431385030] [2021-05-02 14:43:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:43:44,204 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:43:44,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132635643] [2021-05-02 14:43:44,205 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 14:43:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:43:44,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:43:44,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:43:44,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:44,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:44,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:44,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:44,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:44,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:44,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:44,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:44,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:44,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:44,876 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 31 [2021-05-02 14:43:44,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:44,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:43:45,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:43:45,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431385030] [2021-05-02 14:43:45,043 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:43:45,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132635643] [2021-05-02 14:43:45,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132635643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:43:45,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:43:45,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:43:45,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132885558] [2021-05-02 14:43:45,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:43:45,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:43:45,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:43:45,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:43:45,044 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:43:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:43:45,352 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2021-05-02 14:43:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:43:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2021-05-02 14:43:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:43:45,353 INFO L225 Difference]: With dead ends: 66 [2021-05-02 14:43:45,353 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 14:43:45,354 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 525.4ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:43:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 14:43:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 14:43:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:43:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-05-02 14:43:45,358 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 45 [2021-05-02 14:43:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:43:45,358 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-05-02 14:43:45,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:43:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-05-02 14:43:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 14:43:45,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:43:45,359 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 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] [2021-05-02 14:43:45,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:43:45,564 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:43:45,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:43:45,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2104666202, now seen corresponding path program 2 times [2021-05-02 14:43:45,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:43:45,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264474710] [2021-05-02 14:43:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:43:45,582 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:43:45,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534080532] [2021-05-02 14:43:45,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:43:45,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:43:45,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:43:45,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 14:43:45,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:43:45,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:45,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:45,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:45,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:45,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:45,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:45,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:45,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:45,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:45,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:45,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:45,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:45,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:45,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:47,033 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 29 [2021-05-02 14:43:47,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:47,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:47,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-02 14:43:47,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:43:47,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264474710] [2021-05-02 14:43:47,790 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:43:47,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534080532] [2021-05-02 14:43:47,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534080532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:43:47,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:43:47,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:43:47,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206616683] [2021-05-02 14:43:47,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:43:47,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:43:47,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:43:47,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:43:47,792 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 14:43:48,463 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-02 14:43:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:43:48,527 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-05-02 14:43:48,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:43:48,527 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 53 [2021-05-02 14:43:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:43:48,528 INFO L225 Difference]: With dead ends: 68 [2021-05-02 14:43:48,528 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 14:43:48,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1576.7ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:43:48,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 14:43:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-05-02 14:43:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:43:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-05-02 14:43:48,533 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 53 [2021-05-02 14:43:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:43:48,533 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-05-02 14:43:48,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 14:43:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-05-02 14:43:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 14:43:48,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:43:48,534 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:43:48,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:43:48,737 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:43:48,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:43:48,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1069215477, now seen corresponding path program 3 times [2021-05-02 14:43:48,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:43:48,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517240053] [2021-05-02 14:43:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:43:48,746 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:43:48,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541670253] [2021-05-02 14:43:48,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:01,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:44:01,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:44:01,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 14:44:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:01,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:01,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:01,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:01,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:01,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:01,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:01,744 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-02 14:44:01,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:01,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:02,481 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 14:44:03,395 WARN L205 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 14:44:03,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:03,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:06,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:07,053 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 571 [2021-05-02 14:44:07,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:27,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:27,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517240053] [2021-05-02 14:47:27,815 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:27,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541670253] [2021-05-02 14:47:27,815 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: -978752248 [2021-05-02 14:47:27,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:47:27,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 14:47:27,815 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 14:47:27,815 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 14:47:28,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:28,033 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 14:47:28,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:47:28 BoogieIcfgContainer [2021-05-02 14:47:28,034 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:47:28,034 INFO L168 Benchmark]: Toolchain (without parser) took 226612.01 ms. Allocated memory was 187.7 MB in the beginning and 7.6 GB in the end (delta: 7.4 GB). Free memory was 151.3 MB in the beginning and 5.4 GB in the end (delta: -5.3 GB). Peak memory consumption was 4.1 GB. Max. memory is 8.0 GB. [2021-05-02 14:47:28,034 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 187.7 MB. Free memory is still 167.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:47:28,034 INFO L168 Benchmark]: CACSL2BoogieTranslator took 132.10 ms. Allocated memory is still 187.7 MB. Free memory was 151.1 MB in the beginning and 141.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 14:47:28,034 INFO L168 Benchmark]: Boogie Preprocessor took 48.83 ms. Allocated memory is still 187.7 MB. Free memory was 141.2 MB in the beginning and 171.3 MB in the end (delta: -30.1 MB). Peak memory consumption was 7.5 MB. Max. memory is 8.0 GB. [2021-05-02 14:47:28,034 INFO L168 Benchmark]: RCFGBuilder took 278.13 ms. Allocated memory is still 187.7 MB. Free memory was 171.3 MB in the beginning and 154.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:47:28,034 INFO L168 Benchmark]: TraceAbstraction took 226148.92 ms. Allocated memory was 187.7 MB in the beginning and 7.6 GB in the end (delta: 7.4 GB). Free memory was 154.5 MB in the beginning and 5.4 GB in the end (delta: -5.3 GB). Peak memory consumption was 4.1 GB. Max. memory is 8.0 GB. [2021-05-02 14:47:28,035 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 187.7 MB. Free memory is still 167.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 132.10 ms. Allocated memory is still 187.7 MB. Free memory was 151.1 MB in the beginning and 141.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.83 ms. Allocated memory is still 187.7 MB. Free memory was 141.2 MB in the beginning and 171.3 MB in the end (delta: -30.1 MB). Peak memory consumption was 7.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 278.13 ms. Allocated memory is still 187.7 MB. Free memory was 171.3 MB in the beginning and 154.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 226148.92 ms. Allocated memory was 187.7 MB in the beginning and 7.6 GB in the end (delta: 7.4 GB). Free memory was 154.5 MB in the beginning and 5.4 GB in the end (delta: -5.3 GB). Peak memory consumption was 4.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_unsigned_int() [L29] CALL assume_abort_if_not(A>=0 && A<=50) [L16] COND FALSE !(!cond) [L29] RET assume_abort_if_not(A>=0 && A<=50) [L30] B = __VERIFIER_nondet_unsigned_int() [L31] CALL assume_abort_if_not(B>=0 && B<=50) [L16] COND FALSE !(!cond) [L31] RET assume_abort_if_not(B>=0 && B<=50) [L32] CALL assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L16] COND FALSE !(!cond) [L32] RET assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L33] CALL assume_abort_if_not(B >= 1) [L16] COND FALSE !(!cond) [L33] RET assume_abort_if_not(B >= 1) [L34] q = 0 [L35] r = A [L36] b = B [L37] COND TRUE 1 [L38] COND FALSE !(!(r >= b)) [L39] b = 2 * b [L37] COND TRUE 1 [L38] COND FALSE !(!(r >= b)) [L39] b = 2 * b [L37] COND TRUE 1 [L38] COND TRUE !(r >= b) [L41] COND TRUE 1 [L42] CALL __VERIFIER_assert(A == q * b + r) [L19] COND FALSE !(!(cond)) [L42] RET __VERIFIER_assert(A == q * b + r) [L43] COND FALSE !(!(b != B)) [L44] q = 2 * q [L45] b = b / 2 [L46] COND TRUE r >= b [L47] q = q + 1 [L48] r = r - b [L41] COND TRUE 1 [L42] CALL __VERIFIER_assert(A == q * b + r) [L19] COND FALSE !(!(cond)) [L42] RET __VERIFIER_assert(A == q * b + r) [L43] COND FALSE !(!(b != B)) [L44] q = 2 * q [L45] b = b / 2 [L46] COND TRUE r >= b [L47] q = q + 1 [L48] r = r - b [L41] COND TRUE 1 [L42] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 226108.6ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 11.8ms, AutomataDifference: 1579.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 168 SDtfs, 139 SDslu, 624 SDs, 0 SdLazy, 598 SolverSat, 71 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 663.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 246 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2424.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=6, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 61.5ms AutomataMinimizationTime, 6 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 33.9ms SsaConstructionTime, 253.7ms SatisfiabilityAnalysisTime, 3551.3ms InterpolantComputationTime, 247 NumberOfCodeBlocks, 247 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 241 ConstructedInterpolants, 0 QuantifiedInterpolants, 1368 SizeOfPredicates, 17 NumberOfNonLiveVariables, 667 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 135/174 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...