/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/hard-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:29:37,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:29:37,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:29:37,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:29:37,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:29:37,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:29:37,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:29:37,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:29:37,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:29:37,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:29:37,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:29:37,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:29:37,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:29:37,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:29:37,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:29:37,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:29:37,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:29:37,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:29:37,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:29:37,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:29:37,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:29:37,653 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:29:37,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:29:37,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:29:37,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:29:37,657 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:29:37,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:29:37,657 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:29:37,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:29:37,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:29:37,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:29:37,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:29:37,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:29:37,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:29:37,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:29:37,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:29:37,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:29:37,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:29:37,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:29:37,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:29:37,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:29:37,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:29:37,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:29:37,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:29:37,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:29:37,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:29:37,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:29:37,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:29:37,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:29:37,661 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:29:37,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:29:37,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:29:37,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:29:37,954 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:29:37,954 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:29:37,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c [2021-05-02 15:29:38,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19e73bb90/6d5d276afefc4811ae6e1f8a5fe923cc/FLAG72e33526d [2021-05-02 15:29:38,458 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:29:38,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c [2021-05-02 15:29:38,465 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19e73bb90/6d5d276afefc4811ae6e1f8a5fe923cc/FLAG72e33526d [2021-05-02 15:29:38,485 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19e73bb90/6d5d276afefc4811ae6e1f8a5fe923cc [2021-05-02 15:29:38,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:29:38,489 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:29:38,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:29:38,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:29:38,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:29:38,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:29:38" (1/1) ... [2021-05-02 15:29:38,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43413f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:29:38, skipping insertion in model container [2021-05-02 15:29:38,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:29:38" (1/1) ... [2021-05-02 15:29:38,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:29:38,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:29:38,648 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/hard-ll_valuebound50.c[546,559] [2021-05-02 15:29:38,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:29:38,680 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:29:38,743 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/hard-ll_valuebound50.c[546,559] [2021-05-02 15:29:38,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:29:38,772 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:29:38,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:29:38 WrapperNode [2021-05-02 15:29:38,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:29:38,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:29:38,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:29:38,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:29:38,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:29:38" (1/1) ... [2021-05-02 15:29:38,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:29:38" (1/1) ... [2021-05-02 15:29:38,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:29:38" (1/1) ... [2021-05-02 15:29:38,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:29:38" (1/1) ... [2021-05-02 15:29:38,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:29:38" (1/1) ... [2021-05-02 15:29:38,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:29:38" (1/1) ... [2021-05-02 15:29:38,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:29:38" (1/1) ... [2021-05-02 15:29:38,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:29:38,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:29:38,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:29:38,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:29:38,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:29:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:29:38,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:29:38,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:29:38,898 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:29:38,898 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:29:38,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:29:38,899 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:29:38,899 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:29:38,899 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:29:38,899 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:29:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:29:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:29:38,900 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:29:38,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:29:38,901 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:29:38,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:29:38,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:29:38,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:29:38,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:29:38,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:29:38,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:29:39,104 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:29:39,104 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:29:39,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:29:39 BoogieIcfgContainer [2021-05-02 15:29:39,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:29:39,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:29:39,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:29:39,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:29:39,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:29:38" (1/3) ... [2021-05-02 15:29:39,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@520d0c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:29:39, skipping insertion in model container [2021-05-02 15:29:39,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:29:38" (2/3) ... [2021-05-02 15:29:39,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@520d0c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:29:39, skipping insertion in model container [2021-05-02 15:29:39,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:29:39" (3/3) ... [2021-05-02 15:29:39,111 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound50.c [2021-05-02 15:29:39,116 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:29:39,119 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:29:39,134 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:29:39,160 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:29:39,160 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:29:39,161 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:29:39,161 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:29:39,161 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:29:39,161 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:29:39,161 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:29:39,161 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:29:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 15:29:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:29:39,210 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:39,211 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:29:39,211 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:39,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:39,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-02 15:29:39,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:39,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007347654] [2021-05-02 15:29:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:39,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:29:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:39,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:29:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:39,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:29:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:39,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:29:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:29:39,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:39,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007347654] [2021-05-02 15:29:39,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007347654] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:29:39,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:29:39,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:29:39,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759446560] [2021-05-02 15:29:39,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:29:39,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:39,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:29:39,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:29:39,552 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:29:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:39,724 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-02 15:29:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:29:39,727 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 15:29:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:39,734 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:29:39,734 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:29:39,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:29:39,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:29:39,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 15:29:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:29:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 15:29:39,794 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 15:29:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:39,794 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 15:29:39,794 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:29:39,794 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 15:29:39,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:29:39,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:39,796 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:29:39,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:29:39,797 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:39,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:39,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-02 15:29:39,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:39,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707789022] [2021-05-02 15:29:39,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:39,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:29:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:39,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:29:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:39,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:29:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:39,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:29:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:29:39,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:39,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707789022] [2021-05-02 15:29:39,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707789022] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:29:39,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:29:39,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:29:39,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453490931] [2021-05-02 15:29:39,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:29:39,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:39,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:29:39,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:29:39,965 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 15:29:40,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:40,324 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-02 15:29:40,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:29:40,324 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-02 15:29:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:40,325 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:29:40,326 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 15:29:40,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:29:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 15:29:40,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 15:29:40,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:29:40,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:29:40,336 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 15:29:40,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:40,336 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:29:40,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 15:29:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:29:40,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:29:40,337 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:40,337 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:29:40,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:29:40,338 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-02 15:29:40,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:40,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909777481] [2021-05-02 15:29:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:40,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:29:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:40,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:29:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:40,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:29:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:40,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:29:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:40,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 15:29:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:29:40,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:40,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909777481] [2021-05-02 15:29:40,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909777481] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:29:40,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:29:40,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:29:40,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874707111] [2021-05-02 15:29:40,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:29:40,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:40,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:29:40,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:29:40,431 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:29:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:40,710 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-02 15:29:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:29:40,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:29:40,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:40,713 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:29:40,713 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:29:40,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:29:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:29:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 15:29:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:29:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 15:29:40,737 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 15:29:40,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:40,737 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 15:29:40,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:29:40,737 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 15:29:40,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:29:40,738 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:40,738 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:29:40,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 15:29:40,739 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:40,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:40,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-02 15:29:40,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:40,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098840746] [2021-05-02 15:29:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:40,749 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:29:40,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124758975] [2021-05-02 15:29:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:40,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:29:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:29:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 15:29:41,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:41,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098840746] [2021-05-02 15:29:41,035 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:29:41,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124758975] [2021-05-02 15:29:41,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124758975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:29:41,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:29:41,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:29:41,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013467891] [2021-05-02 15:29:41,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:29:41,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:41,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:29:41,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:29:41,037 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:29:41,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:41,185 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-05-02 15:29:41,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:29:41,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-02 15:29:41,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:41,187 INFO L225 Difference]: With dead ends: 73 [2021-05-02 15:29:41,187 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 15:29:41,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:29:41,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 15:29:41,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 15:29:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:29:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-05-02 15:29:41,207 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 38 [2021-05-02 15:29:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:41,208 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-05-02 15:29:41,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:29:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-05-02 15:29:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 15:29:41,209 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:41,209 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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, 1] [2021-05-02 15:29:41,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:41,430 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:41,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:41,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-02 15:29:41,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:41,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475473558] [2021-05-02 15:29:41,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:41,445 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:29:41,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357490059] [2021-05-02 15:29:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:41,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:29:41,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:29:41,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:41,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:41,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:41,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:41,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:41,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:41,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:41,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:41,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:41,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:41,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 15:29:41,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:41,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475473558] [2021-05-02 15:29:41,888 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:29:41,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357490059] [2021-05-02 15:29:41,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357490059] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:29:41,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:29:41,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 15:29:41,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042965168] [2021-05-02 15:29:41,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:29:41,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:41,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:29:41,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:29:41,896 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:29:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:42,072 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-02 15:29:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:29:42,073 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 15:29:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:42,075 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:29:42,076 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 15:29:42,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:29:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 15:29:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 15:29:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:29:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 15:29:42,089 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-02 15:29:42,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:42,090 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 15:29:42,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:29:42,091 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 15:29:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:29:42,094 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:42,095 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2021-05-02 15:29:42,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:42,309 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:42,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:42,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-02 15:29:42,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:42,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576982438] [2021-05-02 15:29:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:42,318 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:29:42,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564689445] [2021-05-02 15:29:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:42,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 15:29:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:29:42,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:42,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:42,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:42,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:42,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:42,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:42,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:42,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:42,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:42,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:42,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:42,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 15:29:42,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:42,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576982438] [2021-05-02 15:29:42,610 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:29:42,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564689445] [2021-05-02 15:29:42,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564689445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:29:42,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:29:42,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:29:42,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584557764] [2021-05-02 15:29:42,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:29:42,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:42,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:29:42,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:29:42,613 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:29:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:42,882 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2021-05-02 15:29:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:29:42,882 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 15:29:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:42,884 INFO L225 Difference]: With dead ends: 95 [2021-05-02 15:29:42,884 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 15:29:42,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:29:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 15:29:42,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 15:29:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 15:29:42,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2021-05-02 15:29:42,896 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 55 [2021-05-02 15:29:42,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:42,897 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2021-05-02 15:29:42,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:29:42,897 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2021-05-02 15:29:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 15:29:42,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:42,898 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 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 15:29:43,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:43,113 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:43,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1784683007, now seen corresponding path program 1 times [2021-05-02 15:29:43,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:43,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888965136] [2021-05-02 15:29:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:43,122 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:29:43,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963454831] [2021-05-02 15:29:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:43,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 15:29:43,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:29:43,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 15:29:43,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:43,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888965136] [2021-05-02 15:29:43,667 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:29:43,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963454831] [2021-05-02 15:29:43,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963454831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:29:43,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:29:43,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:29:43,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992810366] [2021-05-02 15:29:43,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:29:43,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:43,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:29:43,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:29:43,669 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:29:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:43,987 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2021-05-02 15:29:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:29:43,988 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-02 15:29:43,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:43,989 INFO L225 Difference]: With dead ends: 91 [2021-05-02 15:29:43,989 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 15:29:43,989 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:29:43,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 15:29:43,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 15:29:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 52 states have internal predecessors, (56), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:29:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-05-02 15:29:44,000 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 62 [2021-05-02 15:29:44,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:44,000 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-05-02 15:29:44,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:29:44,001 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-05-02 15:29:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 15:29:44,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:44,001 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:29:44,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:44,224 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:44,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:44,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-02 15:29:44,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:44,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114850805] [2021-05-02 15:29:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:44,235 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:29:44,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507453847] [2021-05-02 15:29:44,235 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 15:29:44,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:29:44,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:29:44,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 15:29:44,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:29:44,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:44,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 50 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 15:29:45,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:45,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114850805] [2021-05-02 15:29:45,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:29:45,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507453847] [2021-05-02 15:29:45,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507453847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:29:45,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:29:45,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:29:45,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313568451] [2021-05-02 15:29:45,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:29:45,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:45,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:29:45,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:29:45,174 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 15:29:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:45,671 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2021-05-02 15:29:45,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:29:45,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 72 [2021-05-02 15:29:45,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:45,673 INFO L225 Difference]: With dead ends: 125 [2021-05-02 15:29:45,673 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 15:29:45,674 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:29:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 15:29:45,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-05-02 15:29:45,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 72 states have internal predecessors, (79), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 15:29:45,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2021-05-02 15:29:45,688 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 72 [2021-05-02 15:29:45,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:45,688 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2021-05-02 15:29:45,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 15:29:45,688 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2021-05-02 15:29:45,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 15:29:45,689 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:45,689 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:29:45,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 15:29:45,914 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:45,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:45,914 INFO L82 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2021-05-02 15:29:45,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:45,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558071157] [2021-05-02 15:29:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:45,923 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:29:45,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565280022] [2021-05-02 15:29:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:45,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 15:29:45,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:29:46,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-02 15:29:46,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:46,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558071157] [2021-05-02 15:29:46,380 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:29:46,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565280022] [2021-05-02 15:29:46,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565280022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:29:46,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:29:46,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:29:46,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326760152] [2021-05-02 15:29:46,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:29:46,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:46,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:29:46,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:29:46,384 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:29:46,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:46,674 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2021-05-02 15:29:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:29:46,674 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-02 15:29:46,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:46,679 INFO L225 Difference]: With dead ends: 129 [2021-05-02 15:29:46,679 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 15:29:46,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:29:46,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 15:29:46,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-05-02 15:29:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 76 states have (on average 1.144736842105263) internal successors, (87), 78 states have internal predecessors, (87), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 15:29:46,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 15:29:46,702 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 75 [2021-05-02 15:29:46,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:46,702 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 15:29:46,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:29:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 15:29:46,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 15:29:46,704 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:46,704 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:29:46,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:46,917 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:46,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1211630783, now seen corresponding path program 2 times [2021-05-02 15:29:46,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:46,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382237642] [2021-05-02 15:29:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:46,928 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:29:46,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740218013] [2021-05-02 15:29:46,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:46,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:29:46,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:29:46,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:29:46,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:29:47,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 41 proven. 7 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-02 15:29:47,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:47,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382237642] [2021-05-02 15:29:47,250 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:29:47,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740218013] [2021-05-02 15:29:47,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740218013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:29:47,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:29:47,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:29:47,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820611922] [2021-05-02 15:29:47,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:29:47,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:47,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:29:47,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:29:47,253 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:29:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:47,427 INFO L93 Difference]: Finished difference Result 138 states and 165 transitions. [2021-05-02 15:29:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:29:47,427 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 79 [2021-05-02 15:29:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:47,429 INFO L225 Difference]: With dead ends: 138 [2021-05-02 15:29:47,429 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 15:29:47,430 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:29:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 15:29:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-05-02 15:29:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 82 states have (on average 1.146341463414634) internal successors, (94), 84 states have internal predecessors, (94), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:29:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2021-05-02 15:29:47,445 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 79 [2021-05-02 15:29:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:47,445 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2021-05-02 15:29:47,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:29:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2021-05-02 15:29:47,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 15:29:47,450 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:47,450 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:29:47,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 15:29:47,669 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:47,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:47,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 2 times [2021-05-02 15:29:47,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:47,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135427698] [2021-05-02 15:29:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:47,677 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:29:47,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515296842] [2021-05-02 15:29:47,677 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:47,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:29:47,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:29:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:29:47,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:29:47,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:47,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-02 15:29:48,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:48,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135427698] [2021-05-02 15:29:48,031 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:29:48,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515296842] [2021-05-02 15:29:48,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515296842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:29:48,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:29:48,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:29:48,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668833671] [2021-05-02 15:29:48,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:29:48,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:48,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:29:48,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:29:48,032 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 15:29:48,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:48,232 INFO L93 Difference]: Finished difference Result 161 states and 194 transitions. [2021-05-02 15:29:48,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:29:48,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-02 15:29:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:48,235 INFO L225 Difference]: With dead ends: 161 [2021-05-02 15:29:48,235 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 15:29:48,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:29:48,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 15:29:48,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-05-02 15:29:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 84 states have (on average 1.119047619047619) internal successors, (94), 87 states have internal predecessors, (94), 35 states have call successors, (35), 19 states have call predecessors, (35), 18 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:29:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2021-05-02 15:29:48,249 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 80 [2021-05-02 15:29:48,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:48,249 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2021-05-02 15:29:48,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 15:29:48,250 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2021-05-02 15:29:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 15:29:48,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:48,251 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:29:48,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 15:29:48,465 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:48,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:48,466 INFO L82 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2021-05-02 15:29:48,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:48,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551405220] [2021-05-02 15:29:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:48,475 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:29:48,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460287321] [2021-05-02 15:29:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:48,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 15:29:48,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:29:48,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:48,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,261 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-02 15:29:49,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 72 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-05-02 15:29:49,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:49,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551405220] [2021-05-02 15:29:49,989 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:29:49,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460287321] [2021-05-02 15:29:49,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460287321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:29:49,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:29:49,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 15:29:49,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189525678] [2021-05-02 15:29:49,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 15:29:49,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:49,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 15:29:49,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:29:49,990 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 15:29:52,573 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 15:29:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:52,684 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2021-05-02 15:29:52,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 15:29:52,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2021-05-02 15:29:52,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:52,685 INFO L225 Difference]: With dead ends: 144 [2021-05-02 15:29:52,685 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 15:29:52,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 846.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-02 15:29:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 15:29:52,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 15:29:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 69 states have internal predecessors, (76), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 15:29:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2021-05-02 15:29:52,710 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 86 [2021-05-02 15:29:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:52,710 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2021-05-02 15:29:52,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 15:29:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2021-05-02 15:29:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 15:29:52,711 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:52,711 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:29:52,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 15:29:52,925 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:52,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1094644914, now seen corresponding path program 3 times [2021-05-02 15:29:52,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:52,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456240655] [2021-05-02 15:29:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:52,937 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:29:52,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994087410] [2021-05-02 15:29:52,937 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:53,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:29:53,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:29:53,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 15:29:53,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:29:55,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:55,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 82 proven. 8 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-05-02 15:29:55,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:55,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456240655] [2021-05-02 15:29:55,771 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:29:55,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994087410] [2021-05-02 15:29:55,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994087410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:29:55,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:29:55,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:29:55,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842266832] [2021-05-02 15:29:55,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:29:55,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:55,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:29:55,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=68, Unknown=1, NotChecked=0, Total=90 [2021-05-02 15:29:55,772 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 15:30:20,698 WARN L205 SmtUtils]: Spent 8.22 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 15:30:26,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:26,961 INFO L93 Difference]: Finished difference Result 137 states and 160 transitions. [2021-05-02 15:30:26,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:30:26,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 89 [2021-05-02 15:30:26,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:26,963 INFO L225 Difference]: With dead ends: 137 [2021-05-02 15:30:26,963 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 15:30:26,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 13339.8ms TimeCoverageRelationStatistics Valid=38, Invalid=116, Unknown=2, NotChecked=0, Total=156 [2021-05-02 15:30:26,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 15:30:26,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-02 15:30:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 77 states have internal predecessors, (83), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 15:30:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2021-05-02 15:30:26,979 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 89 [2021-05-02 15:30:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:26,980 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2021-05-02 15:30:26,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 15:30:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2021-05-02 15:30:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 15:30:26,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:26,981 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:27,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:27,204 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 3 times [2021-05-02 15:30:27,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:27,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73328158] [2021-05-02 15:30:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:27,212 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:27,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615828315] [2021-05-02 15:30:27,212 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:27,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:30:27,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:30:27,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 15:30:27,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:27,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 42 proven. 33 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 15:30:27,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:27,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73328158] [2021-05-02 15:30:27,978 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:27,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615828315] [2021-05-02 15:30:27,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615828315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:30:27,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:30:27,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:30:27,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626311327] [2021-05-02 15:30:27,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:30:27,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:27,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:30:27,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:30:27,983 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-02 15:30:28,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:28,894 INFO L93 Difference]: Finished difference Result 166 states and 199 transitions. [2021-05-02 15:30:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:30:28,894 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 92 [2021-05-02 15:30:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:28,895 INFO L225 Difference]: With dead ends: 166 [2021-05-02 15:30:28,895 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 15:30:28,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:30:28,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 15:30:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2021-05-02 15:30:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 87 states have internal predecessors, (95), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 15:30:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-05-02 15:30:28,910 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 92 [2021-05-02 15:30:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:28,911 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-05-02 15:30:28,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-02 15:30:28,912 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-05-02 15:30:28,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 15:30:28,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:28,913 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:30:29,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 15:30:29,133 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:29,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:29,133 INFO L82 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 4 times [2021-05-02 15:30:29,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:29,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350718733] [2021-05-02 15:30:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:29,140 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:29,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508978427] [2021-05-02 15:30:29,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:29,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:30:29,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:30:29,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 15:30:29,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:29,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 41 proven. 40 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-05-02 15:30:29,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:29,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350718733] [2021-05-02 15:30:29,884 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:29,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508978427] [2021-05-02 15:30:29,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508978427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:30:29,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:30:29,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 15:30:29,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210888719] [2021-05-02 15:30:29,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 15:30:29,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:29,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 15:30:29,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:30:29,886 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 15:30:30,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:30,411 INFO L93 Difference]: Finished difference Result 153 states and 176 transitions. [2021-05-02 15:30:30,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:30:30,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 97 [2021-05-02 15:30:30,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:30,413 INFO L225 Difference]: With dead ends: 153 [2021-05-02 15:30:30,413 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 15:30:30,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 412.5ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:30:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 15:30:30,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 15:30:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 92 states have internal predecessors, (100), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:30:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2021-05-02 15:30:30,430 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 97 [2021-05-02 15:30:30,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:30,433 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2021-05-02 15:30:30,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 15:30:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2021-05-02 15:30:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 15:30:30,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:30,435 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 15:30:30,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 15:30:30,657 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:30,658 INFO L82 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 5 times [2021-05-02 15:30:30,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:30,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858997856] [2021-05-02 15:30:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:30,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:30,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630520347] [2021-05-02 15:30:30,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:30,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 15:30:30,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:30:30,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 15:30:30,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:30,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:30,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:30,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:30,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:30,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:30,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 52 proven. 40 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-05-02 15:30:31,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:31,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858997856] [2021-05-02 15:30:31,520 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:31,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630520347] [2021-05-02 15:30:31,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630520347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:30:31,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:30:31,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 15:30:31,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117471933] [2021-05-02 15:30:31,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 15:30:31,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:31,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 15:30:31,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:30:31,521 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 15:30:32,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:32,342 INFO L93 Difference]: Finished difference Result 180 states and 214 transitions. [2021-05-02 15:30:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 15:30:32,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-02 15:30:32,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:32,344 INFO L225 Difference]: With dead ends: 180 [2021-05-02 15:30:32,344 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 15:30:32,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 425.1ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:30:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 15:30:32,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-05-02 15:30:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 96 states have internal predecessors, (104), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:30:32,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2021-05-02 15:30:32,358 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 105 [2021-05-02 15:30:32,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:32,358 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2021-05-02 15:30:32,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 15:30:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2021-05-02 15:30:32,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 15:30:32,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:32,360 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 15:30:32,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 15:30:32,576 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:32,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:32,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2055944765, now seen corresponding path program 1 times [2021-05-02 15:30:32,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:32,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181554190] [2021-05-02 15:30:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:32,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:32,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429270568] [2021-05-02 15:30:32,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:32,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:30:32,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:32,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:32,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:37,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:33:37,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181554190] [2021-05-02 15:33:37,990 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:33:37,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429270568] [2021-05-02 15:33:37,991 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: -1239324874 [2021-05-02 15:33:37,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:33:37,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 15:33:37,991 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 15:33:37,991 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:33:38,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:33:38,553 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 15:33:38,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:33:38 BoogieIcfgContainer [2021-05-02 15:33:38,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:33:38,554 INFO L168 Benchmark]: Toolchain (without parser) took 240065.16 ms. Allocated memory was 185.6 MB in the beginning and 6.9 GB in the end (delta: 6.8 GB). Free memory was 149.5 MB in the beginning and 6.1 GB in the end (delta: -6.0 GB). Peak memory consumption was 4.7 GB. Max. memory is 8.0 GB. [2021-05-02 15:33:38,554 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 185.6 MB. Free memory is still 166.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:33:38,554 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.52 ms. Allocated memory is still 185.6 MB. Free memory was 149.3 MB in the beginning and 168.2 MB in the end (delta: -18.9 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:33:38,554 INFO L168 Benchmark]: Boogie Preprocessor took 40.60 ms. Allocated memory is still 185.6 MB. Free memory was 168.2 MB in the beginning and 167.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:33:38,554 INFO L168 Benchmark]: RCFGBuilder took 290.74 ms. Allocated memory is still 185.6 MB. Free memory was 166.6 MB in the beginning and 150.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:33:38,555 INFO L168 Benchmark]: TraceAbstraction took 239447.13 ms. Allocated memory was 185.6 MB in the beginning and 6.9 GB in the end (delta: 6.8 GB). Free memory was 150.4 MB in the beginning and 6.1 GB in the end (delta: -6.0 GB). Peak memory consumption was 4.7 GB. Max. memory is 8.0 GB. [2021-05-02 15:33:38,555 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 185.6 MB. Free memory is still 166.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.52 ms. Allocated memory is still 185.6 MB. Free memory was 149.3 MB in the beginning and 168.2 MB in the end (delta: -18.9 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.60 ms. Allocated memory is still 185.6 MB. Free memory was 168.2 MB in the beginning and 167.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 290.74 ms. Allocated memory is still 185.6 MB. Free memory was 166.6 MB in the beginning and 150.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 239447.13 ms. Allocated memory was 185.6 MB in the beginning and 6.9 GB in the end (delta: 6.8 GB). Free memory was 150.4 MB in the beginning and 6.1 GB in the end (delta: -6.0 GB). Peak memory consumption was 4.7 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: 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: [L23] unsigned int A, B; [L24] long long r, d, p, q; [L25] A = __VERIFIER_nondet_unsigned_int() [L26] CALL assume_abort_if_not(A>=0 && A<=50) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(A>=0 && A<=50) [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B>=0 && B<=50) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B>=0 && B<=50) [L29] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L29] RET assume_abort_if_not(B >= 1) [L31] r = A [L32] d = B [L33] p = 1 [L34] q = 0 [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(d == B * p) [L40] COND FALSE !(!(r >= d)) [L42] d = 2 * d [L43] p = 2 * p [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(d == B * p) [L40] COND FALSE !(!(r >= d)) [L42] d = 2 * d [L43] p = 2 * p [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(d == B * p) [L40] COND TRUE !(r >= d) [L46] COND TRUE 1 [L47] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(A == q*B + r) [L48] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(d == B*p) [L50] COND FALSE !(!(p != 1)) [L52] d = d / 2 [L53] p = p / 2 [L54] COND FALSE !(r >= d) [L46] COND TRUE 1 [L47] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(A == q*B + r) [L48] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(d == B*p) [L50] COND FALSE !(!(p != 1)) [L52] d = d / 2 [L53] p = p / 2 [L54] COND TRUE r >= d [L55] r = r - d [L56] q = q + p [L46] COND TRUE 1 [L47] CALL __VERIFIER_assert(A == q*B + r) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 239050.9ms, OverallIterations: 17, TraceHistogramMax: 14, EmptinessCheckTime: 43.3ms, AutomataDifference: 39106.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 594 SDtfs, 511 SDslu, 3048 SDs, 0 SdLazy, 4156 SolverSat, 457 SolverUnsat, 11 SolverUnknown, 0 SolverNotchecked, 25972.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1050 GetRequests, 858 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 16759.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=150occurred in iteration=16, InterpolantAutomatonStates: 171, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 273.6ms AutomataMinimizationTime, 16 MinimizatonAttempts, 23 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 168.2ms SsaConstructionTime, 675.3ms SatisfiabilityAnalysisTime, 9609.3ms InterpolantComputationTime, 1064 NumberOfCodeBlocks, 1000 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1048 ConstructedInterpolants, 0 QuantifiedInterpolants, 6011 SizeOfPredicates, 63 NumberOfNonLiveVariables, 2612 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 2187/2379 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...