/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/egcd2-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:54:47,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:54:47,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:54:47,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:54:47,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:54:47,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:54:47,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:54:47,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:54:47,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:54:47,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:54:47,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:54:47,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:54:47,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:54:47,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:54:47,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:54:47,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:54:47,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:54:47,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:54:47,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:54:47,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:54:47,926 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:54:47,964 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:54:47,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:54:47,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:54:47,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:54:47,966 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:54:47,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:54:47,966 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:54:47,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:54:47,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:54:47,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:54:47,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:54:47,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:54:47,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:54:47,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:54:47,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:54:47,967 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:54:47,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:54:47,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:54:47,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:54:47,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:54:47,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:54:47,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:54:47,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:54:47,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:54:47,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:54:47,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:54:47,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:54:47,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:54:47,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:54:48,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:54:48,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:54:48,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:54:48,287 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:54:48,288 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:54:48,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound2.c [2021-05-02 14:54:48,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e56ede05/56f7f3d9d9044ec6a5e193744892ccdc/FLAG84e54cc21 [2021-05-02 14:54:48,753 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:54:48,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound2.c [2021-05-02 14:54:48,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e56ede05/56f7f3d9d9044ec6a5e193744892ccdc/FLAG84e54cc21 [2021-05-02 14:54:49,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e56ede05/56f7f3d9d9044ec6a5e193744892ccdc [2021-05-02 14:54:49,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:54:49,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:54:49,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:54:49,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:54:49,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:54:49,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:54:49" (1/1) ... [2021-05-02 14:54:49,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@312493c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:54:49, skipping insertion in model container [2021-05-02 14:54:49,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:54:49" (1/1) ... [2021-05-02 14:54:49,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:54:49,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:54:49,314 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/egcd2-ll_valuebound2.c[490,503] [2021-05-02 14:54:49,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:54:49,340 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:54:49,349 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/egcd2-ll_valuebound2.c[490,503] [2021-05-02 14:54:49,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:54:49,373 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:54:49,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:54:49 WrapperNode [2021-05-02 14:54:49,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:54:49,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:54:49,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:54:49,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:54:49,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:54:49" (1/1) ... [2021-05-02 14:54:49,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:54:49" (1/1) ... [2021-05-02 14:54:49,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:54:49" (1/1) ... [2021-05-02 14:54:49,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:54:49" (1/1) ... [2021-05-02 14:54:49,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:54:49" (1/1) ... [2021-05-02 14:54:49,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:54:49" (1/1) ... [2021-05-02 14:54:49,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:54:49" (1/1) ... [2021-05-02 14:54:49,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:54:49,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:54:49,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:54:49,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:54:49,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:54:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:54:49,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:54:49,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:54:49,508 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:54:49,508 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:54:49,508 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:54:49,508 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:54:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:54:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:54:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:54:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:54:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:54:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:54:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:54:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:54:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:54:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:54:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:54:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:54:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:54:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:54:49,748 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:54:49,749 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:54:49,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:54:49 BoogieIcfgContainer [2021-05-02 14:54:49,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:54:49,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:54:49,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:54:49,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:54:49,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:54:49" (1/3) ... [2021-05-02 14:54:49,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363d0805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:54:49, skipping insertion in model container [2021-05-02 14:54:49,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:54:49" (2/3) ... [2021-05-02 14:54:49,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363d0805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:54:49, skipping insertion in model container [2021-05-02 14:54:49,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:54:49" (3/3) ... [2021-05-02 14:54:49,768 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.c [2021-05-02 14:54:49,773 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:54:49,776 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:54:49,809 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:54:49,829 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:54:49,829 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:54:49,830 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:54:49,830 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:54:49,830 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:54:49,830 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:54:49,830 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:54:49,830 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:54:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 14:54:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:54:49,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:54:49,850 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:54:49,851 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:54:49,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:54:49,855 INFO L82 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2021-05-02 14:54:49,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:54:49,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706819735] [2021-05-02 14:54:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:54:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:50,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:54:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:50,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:54:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:50,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:54:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:50,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:54:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:50,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:54:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:50,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 14:54:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:50,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 14:54:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 14:54:50,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:54:50,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706819735] [2021-05-02 14:54:50,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706819735] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:54:50,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:54:50,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:54:50,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469859881] [2021-05-02 14:54:50,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:54:50,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:54:50,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:54:50,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:54:50,209 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:54:50,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:54:50,390 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2021-05-02 14:54:50,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:54:50,392 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 14:54:50,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:54:50,399 INFO L225 Difference]: With dead ends: 73 [2021-05-02 14:54:50,400 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:54:50,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:54:50,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:54:50,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:54:50,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:54:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 14:54:50,461 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-02 14:54:50,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:54:50,461 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 14:54:50,461 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:54:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 14:54:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 14:54:50,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:54:50,463 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 14:54:50,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:54:50,464 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:54:50,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:54:50,468 INFO L82 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2021-05-02 14:54:50,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:54:50,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819678910] [2021-05-02 14:54:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:54:50,505 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:54:50,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546311034] [2021-05-02 14:54:50,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:54:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:50,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:54:50,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:54:50,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:50,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:50,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:50,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:50,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 14:54:50,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:54:50,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819678910] [2021-05-02 14:54:50,706 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:54:50,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546311034] [2021-05-02 14:54:50,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546311034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:54:50,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:54:50,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:54:50,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502305172] [2021-05-02 14:54:50,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:54:50,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:54:50,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:54:50,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:54:50,709 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:54:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:54:50,827 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-05-02 14:54:50,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:54:50,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-02 14:54:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:54:50,831 INFO L225 Difference]: With dead ends: 52 [2021-05-02 14:54:50,831 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 14:54:50,832 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:54:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 14:54:50,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 14:54:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:54:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 14:54:50,857 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-02 14:54:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:54:50,857 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 14:54:50,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:54:50,858 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 14:54:50,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 14:54:50,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:54:50,861 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1] [2021-05-02 14:54:51,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:54:51,081 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:54:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:54:51,082 INFO L82 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2021-05-02 14:54:51,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:54:51,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103862378] [2021-05-02 14:54:51,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:54:51,094 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:54:51,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542262305] [2021-05-02 14:54:51,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:54:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:51,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:54:51,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:54:51,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:54:51,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:54:51,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103862378] [2021-05-02 14:54:51,316 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:54:51,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542262305] [2021-05-02 14:54:51,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542262305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:54:51,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:54:51,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:54:51,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398289625] [2021-05-02 14:54:51,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:54:51,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:54:51,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:54:51,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:54:51,319 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:54:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:54:51,459 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2021-05-02 14:54:51,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:54:51,460 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-05-02 14:54:51,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:54:51,461 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:54:51,461 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 14:54:51,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:54:51,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 14:54:51,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-02 14:54:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 14:54:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-02 14:54:51,471 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-02 14:54:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:54:51,471 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-02 14:54:51,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 14:54:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-02 14:54:51,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 14:54:51,472 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:54:51,472 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:54:51,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:54:51,689 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:54:51,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:54:51,689 INFO L82 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2021-05-02 14:54:51,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:54:51,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078652130] [2021-05-02 14:54:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:54:51,701 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:54:51,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122914911] [2021-05-02 14:54:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:54:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:51,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:54:51,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:54:51,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:51,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:54:52,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:54:52,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078652130] [2021-05-02 14:54:52,036 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:54:52,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122914911] [2021-05-02 14:54:52,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122914911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:54:52,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:54:52,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:54:52,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899462889] [2021-05-02 14:54:52,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:54:52,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:54:52,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:54:52,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:54:52,038 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 14:54:52,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:54:52,173 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-02 14:54:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:54:52,173 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 50 [2021-05-02 14:54:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:54:52,176 INFO L225 Difference]: With dead ends: 56 [2021-05-02 14:54:52,176 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:54:52,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:54:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:54:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 14:54:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:54:52,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-02 14:54:52,187 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-02 14:54:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:54:52,188 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-02 14:54:52,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 14:54:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-02 14:54:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 14:54:52,189 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:54:52,189 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:54:52,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:54:52,393 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:54:52,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:54:52,393 INFO L82 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2021-05-02 14:54:52,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:54:52,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954383853] [2021-05-02 14:54:52,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:54:52,405 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:54:52,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230488592] [2021-05-02 14:54:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:54:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:52,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:54:52,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:54:52,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 14:54:52,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:54:52,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954383853] [2021-05-02 14:54:52,717 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:54:52,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230488592] [2021-05-02 14:54:52,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230488592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:54:52,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:54:52,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:54:52,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481986679] [2021-05-02 14:54:52,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:54:52,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:54:52,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:54:52,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:54:52,719 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 14:54:52,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:54:52,867 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-05-02 14:54:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:54:52,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-02 14:54:52,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:54:52,868 INFO L225 Difference]: With dead ends: 60 [2021-05-02 14:54:52,868 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 14:54:52,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:54:52,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 14:54:52,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 14:54:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:54:52,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-02 14:54:52,879 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-02 14:54:52,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:54:52,879 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-02 14:54:52,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 14:54:52,879 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-02 14:54:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 14:54:52,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:54:52,880 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1] [2021-05-02 14:54:53,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:54:53,097 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:54:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:54:53,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2021-05-02 14:54:53,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:54:53,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162411093] [2021-05-02 14:54:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:54:53,109 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:54:53,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583846748] [2021-05-02 14:54:53,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:54:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:53,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 14:54:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:54:53,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-05-02 14:54:53,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:54:53,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162411093] [2021-05-02 14:54:53,355 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:54:53,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583846748] [2021-05-02 14:54:53,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583846748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:54:53,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:54:53,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:54:53,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398804164] [2021-05-02 14:54:53,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:54:53,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:54:53,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:54:53,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:54:53,359 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 14:54:57,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:54:57,613 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-05-02 14:54:57,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:54:57,613 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 60 [2021-05-02 14:54:57,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:54:57,614 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:54:57,614 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 14:54:57,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:54:57,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 14:54:57,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 14:54:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:54:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-02 14:54:57,623 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-02 14:54:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:54:57,624 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-02 14:54:57,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 14:54:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-02 14:54:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 14:54:57,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:54:57,625 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:54:57,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:54:57,838 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:54:57,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:54:57,838 INFO L82 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2021-05-02 14:54:57,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:54:57,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935188593] [2021-05-02 14:54:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:54:57,849 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:54:57,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671560264] [2021-05-02 14:54:57,849 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 14:54:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:57,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:54:57,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:54:57,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 14:54:58,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:54:58,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935188593] [2021-05-02 14:54:58,042 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:54:58,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671560264] [2021-05-02 14:54:58,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671560264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:54:58,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:54:58,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:54:58,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282159984] [2021-05-02 14:54:58,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:54:58,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:54:58,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:54:58,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:54:58,044 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 14:54:58,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:54:58,205 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2021-05-02 14:54:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:54:58,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2021-05-02 14:54:58,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:54:58,207 INFO L225 Difference]: With dead ends: 91 [2021-05-02 14:54:58,207 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 14:54:58,208 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:54:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 14:54:58,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-05-02 14:54:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 45 states have internal predecessors, (48), 28 states have call successors, (28), 9 states have call predecessors, (28), 8 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 14:54:58,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 14:54:58,221 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 67 [2021-05-02 14:54:58,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:54:58,221 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 14:54:58,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 14:54:58,221 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 14:54:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:54:58,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:54:58,222 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:54:58,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:54:58,445 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:54:58,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:54:58,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2021-05-02 14:54:58,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:54:58,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473745748] [2021-05-02 14:54:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:54:58,457 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:54:58,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097841024] [2021-05-02 14:54:58,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:54:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:58,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:54:58,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:54:58,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 14:54:58,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:54:58,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473745748] [2021-05-02 14:54:58,661 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:54:58,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097841024] [2021-05-02 14:54:58,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097841024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:54:58,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:54:58,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:54:58,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411390784] [2021-05-02 14:54:58,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:54:58,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:54:58,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:54:58,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:54:58,662 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:54:58,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:54:58,847 INFO L93 Difference]: Finished difference Result 124 states and 172 transitions. [2021-05-02 14:54:58,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:54:58,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 14:54:58,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:54:58,849 INFO L225 Difference]: With dead ends: 124 [2021-05-02 14:54:58,849 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 14:54:58,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:54:58,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 14:54:58,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2021-05-02 14:54:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 59 states have internal predecessors, (65), 41 states have call successors, (41), 9 states have call predecessors, (41), 8 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 14:54:58,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 145 transitions. [2021-05-02 14:54:58,868 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 145 transitions. Word has length 69 [2021-05-02 14:54:58,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:54:58,868 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 145 transitions. [2021-05-02 14:54:58,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:54:58,868 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 145 transitions. [2021-05-02 14:54:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 14:54:58,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:54:58,876 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2021-05-02 14:54:59,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:54:59,100 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:54:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:54:59,100 INFO L82 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2021-05-02 14:54:59,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:54:59,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297082320] [2021-05-02 14:54:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:54:59,109 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:54:59,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110171974] [2021-05-02 14:54:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:54:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:54:59,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 14:54:59,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:54:59,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:54:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-05-02 14:54:59,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:54:59,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297082320] [2021-05-02 14:54:59,453 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:54:59,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110171974] [2021-05-02 14:54:59,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110171974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:54:59,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:54:59,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:54:59,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923025219] [2021-05-02 14:54:59,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:54:59,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:54:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:54:59,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:54:59,457 INFO L87 Difference]: Start difference. First operand 105 states and 145 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:54:59,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:54:59,758 INFO L93 Difference]: Finished difference Result 150 states and 213 transitions. [2021-05-02 14:54:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:54:59,759 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2021-05-02 14:54:59,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:54:59,761 INFO L225 Difference]: With dead ends: 150 [2021-05-02 14:54:59,761 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 14:54:59,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:54:59,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 14:54:59,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-05-02 14:54:59,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 81 states have internal predecessors, (89), 60 states have call successors, (60), 10 states have call predecessors, (60), 9 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 14:54:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 206 transitions. [2021-05-02 14:54:59,807 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 206 transitions. Word has length 75 [2021-05-02 14:54:59,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:54:59,808 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 206 transitions. [2021-05-02 14:54:59,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:54:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 206 transitions. [2021-05-02 14:54:59,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:54:59,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:54:59,812 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1] [2021-05-02 14:55:00,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:55:00,035 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:00,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 2 times [2021-05-02 14:55:00,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:00,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823826030] [2021-05-02 14:55:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:00,047 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:00,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466729586] [2021-05-02 14:55:00,048 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 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 14:55:00,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:55:00,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:00,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 14:55:00,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:00,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-02 14:55:00,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:00,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823826030] [2021-05-02 14:55:00,356 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:00,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466729586] [2021-05-02 14:55:00,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466729586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:00,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:00,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:55:00,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031406797] [2021-05-02 14:55:00,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:55:00,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:00,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:55:00,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:55:00,357 INFO L87 Difference]: Start difference. First operand 144 states and 206 transitions. Second operand has 10 states, 10 states have (on average 2.5) 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), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:55:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:00,618 INFO L93 Difference]: Finished difference Result 152 states and 213 transitions. [2021-05-02 14:55:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:55:00,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) 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), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-02 14:55:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:00,620 INFO L225 Difference]: With dead ends: 152 [2021-05-02 14:55:00,621 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 14:55:00,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:55:00,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 14:55:00,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-05-02 14:55:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 84 states have internal predecessors, (92), 60 states have call successors, (60), 11 states have call predecessors, (60), 10 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 14:55:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2021-05-02 14:55:00,642 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 80 [2021-05-02 14:55:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:00,642 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2021-05-02 14:55:00,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) 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), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:55:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2021-05-02 14:55:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 14:55:00,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:00,643 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1, 1, 1] [2021-05-02 14:55:00,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:00,857 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:00,857 INFO L82 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 3 times [2021-05-02 14:55:00,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:00,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140698222] [2021-05-02 14:55:00,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:00,866 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:00,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862273074] [2021-05-02 14:55:00,866 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 14:55:00,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:55:00,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:00,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 14:55:00,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:00,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:00,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-05-02 14:55:01,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:01,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140698222] [2021-05-02 14:55:01,324 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:01,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862273074] [2021-05-02 14:55:01,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862273074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:01,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:01,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:55:01,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067918076] [2021-05-02 14:55:01,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:55:01,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:01,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:55:01,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:55:01,326 INFO L87 Difference]: Start difference. First operand 148 states and 209 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:55:01,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:01,776 INFO L93 Difference]: Finished difference Result 156 states and 216 transitions. [2021-05-02 14:55:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:55:01,776 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-02 14:55:01,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:01,778 INFO L225 Difference]: With dead ends: 156 [2021-05-02 14:55:01,778 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 14:55:01,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:55:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 14:55:01,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-05-02 14:55:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 80 states have (on average 1.1875) internal successors, (95), 87 states have internal predecessors, (95), 60 states have call successors, (60), 12 states have call predecessors, (60), 11 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 14:55:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 212 transitions. [2021-05-02 14:55:01,799 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 212 transitions. Word has length 85 [2021-05-02 14:55:01,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:01,799 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 212 transitions. [2021-05-02 14:55:01,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:55:01,800 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 212 transitions. [2021-05-02 14:55:01,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 14:55:01,801 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:01,801 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 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, 1] [2021-05-02 14:55:02,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:02,017 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:02,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1507900548, now seen corresponding path program 2 times [2021-05-02 14:55:02,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:02,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376333164] [2021-05-02 14:55:02,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:02,030 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:02,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106500740] [2021-05-02 14:55:02,031 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 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 14:55:02,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:55:02,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:02,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 14:55:02,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:02,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 33 proven. 38 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-05-02 14:55:02,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:02,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376333164] [2021-05-02 14:55:02,433 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:02,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106500740] [2021-05-02 14:55:02,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106500740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:02,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:02,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:55:02,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225060562] [2021-05-02 14:55:02,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:55:02,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:02,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:55:02,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:55:02,435 INFO L87 Difference]: Start difference. First operand 152 states and 212 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:55:02,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:02,886 INFO L93 Difference]: Finished difference Result 234 states and 321 transitions. [2021-05-02 14:55:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:55:02,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 89 [2021-05-02 14:55:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:02,888 INFO L225 Difference]: With dead ends: 234 [2021-05-02 14:55:02,888 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 14:55:02,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:55:02,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 14:55:02,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-05-02 14:55:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 93 states have internal predecessors, (102), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:55:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 225 transitions. [2021-05-02 14:55:02,911 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 225 transitions. Word has length 89 [2021-05-02 14:55:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:02,912 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 225 transitions. [2021-05-02 14:55:02,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:55:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 225 transitions. [2021-05-02 14:55:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 14:55:02,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:02,913 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2021-05-02 14:55:03,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:55:03,137 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:03,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:03,137 INFO L82 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2021-05-02 14:55:03,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:03,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999722556] [2021-05-02 14:55:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:03,145 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:03,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018577021] [2021-05-02 14:55:03,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:55:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:03,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 14:55:03,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:03,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-05-02 14:55:03,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:03,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999722556] [2021-05-02 14:55:03,621 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:03,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018577021] [2021-05-02 14:55:03,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018577021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:03,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:03,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:55:03,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795610194] [2021-05-02 14:55:03,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:55:03,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:03,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:55:03,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:55:03,622 INFO L87 Difference]: Start difference. First operand 164 states and 225 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:55:04,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:04,032 INFO L93 Difference]: Finished difference Result 219 states and 302 transitions. [2021-05-02 14:55:04,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:55:04,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 91 [2021-05-02 14:55:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:04,035 INFO L225 Difference]: With dead ends: 219 [2021-05-02 14:55:04,035 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 14:55:04,037 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:55:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 14:55:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-02 14:55:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 87 states have (on average 1.160919540229885) internal successors, (101), 93 states have internal predecessors, (101), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:55:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 224 transitions. [2021-05-02 14:55:04,087 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 224 transitions. Word has length 91 [2021-05-02 14:55:04,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:04,090 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 224 transitions. [2021-05-02 14:55:04,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:55:04,090 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 224 transitions. [2021-05-02 14:55:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 14:55:04,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:04,091 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 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, 1, 1] [2021-05-02 14:55:04,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:55:04,309 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:04,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:04,309 INFO L82 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 4 times [2021-05-02 14:55:04,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:04,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968612428] [2021-05-02 14:55:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:04,323 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:04,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176844716] [2021-05-02 14:55:04,323 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 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 14:55:04,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:55:04,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:04,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:55:04,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:04,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:04,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:04,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:04,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:04,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:04,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:04,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:04,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:04,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:04,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:04,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:04,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-02 14:55:04,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:04,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968612428] [2021-05-02 14:55:04,538 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:04,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176844716] [2021-05-02 14:55:04,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176844716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:55:04,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:55:04,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:55:04,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020471821] [2021-05-02 14:55:04,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:55:04,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:04,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:55:04,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:55:04,540 INFO L87 Difference]: Start difference. First operand 164 states and 224 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 14:55:04,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:04,615 INFO L93 Difference]: Finished difference Result 202 states and 279 transitions. [2021-05-02 14:55:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:55:04,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2021-05-02 14:55:04,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:04,617 INFO L225 Difference]: With dead ends: 202 [2021-05-02 14:55:04,617 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 14:55:04,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:55:04,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 14:55:04,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 138. [2021-05-02 14:55:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 79 states have internal predecessors, (81), 50 states have call successors, (50), 14 states have call predecessors, (50), 13 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 14:55:04,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 178 transitions. [2021-05-02 14:55:04,641 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 178 transitions. Word has length 100 [2021-05-02 14:55:04,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:04,644 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 178 transitions. [2021-05-02 14:55:04,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 14:55:04,644 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 178 transitions. [2021-05-02 14:55:04,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 14:55:04,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:04,647 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:55:04,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:55:04,861 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:04,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 2 times [2021-05-02 14:55:04,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:04,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915664513] [2021-05-02 14:55:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:04,873 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:04,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340359610] [2021-05-02 14:55:04,874 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 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 14:55:04,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:55:04,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:04,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 14:55:04,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:04,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:04,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:04,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 75 proven. 65 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-05-02 14:55:05,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:05,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915664513] [2021-05-02 14:55:05,520 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:05,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340359610] [2021-05-02 14:55:05,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340359610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:05,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:05,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:55:05,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267796127] [2021-05-02 14:55:05,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:55:05,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:05,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:55:05,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:55:05,521 INFO L87 Difference]: Start difference. First operand 138 states and 178 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:55:06,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:06,200 INFO L93 Difference]: Finished difference Result 149 states and 187 transitions. [2021-05-02 14:55:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:55:06,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 113 [2021-05-02 14:55:06,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:06,203 INFO L225 Difference]: With dead ends: 149 [2021-05-02 14:55:06,203 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 14:55:06,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 482.7ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 14:55:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 14:55:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-05-02 14:55:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 80 states have (on average 1.075) internal successors, (86), 84 states have internal predecessors, (86), 49 states have call successors, (49), 16 states have call predecessors, (49), 15 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 14:55:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 182 transitions. [2021-05-02 14:55:06,226 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 182 transitions. Word has length 113 [2021-05-02 14:55:06,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:06,226 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 182 transitions. [2021-05-02 14:55:06,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:55:06,226 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 182 transitions. [2021-05-02 14:55:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 14:55:06,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:06,227 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 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, 1, 1] [2021-05-02 14:55:06,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:06,441 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:06,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2130763844, now seen corresponding path program 1 times [2021-05-02 14:55:06,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:06,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725748210] [2021-05-02 14:55:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:06,448 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:06,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815256546] [2021-05-02 14:55:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:06,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 14:55:06,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:06,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 38 proven. 39 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-05-02 14:55:06,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:06,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725748210] [2021-05-02 14:55:06,903 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:06,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815256546] [2021-05-02 14:55:06,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815256546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:06,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:06,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:55:06,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194425003] [2021-05-02 14:55:06,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:55:06,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:06,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:55:06,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:55:06,905 INFO L87 Difference]: Start difference. First operand 145 states and 182 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:55:07,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:07,414 INFO L93 Difference]: Finished difference Result 224 states and 288 transitions. [2021-05-02 14:55:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:55:07,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 114 [2021-05-02 14:55:07,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:07,416 INFO L225 Difference]: With dead ends: 224 [2021-05-02 14:55:07,416 INFO L226 Difference]: Without dead ends: 177 [2021-05-02 14:55:07,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-05-02 14:55:07,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-02 14:55:07,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2021-05-02 14:55:07,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 90 states have internal predecessors, (92), 52 states have call successors, (52), 18 states have call predecessors, (52), 17 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 14:55:07,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 194 transitions. [2021-05-02 14:55:07,441 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 194 transitions. Word has length 114 [2021-05-02 14:55:07,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:07,441 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 194 transitions. [2021-05-02 14:55:07,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:55:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 194 transitions. [2021-05-02 14:55:07,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 14:55:07,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:07,442 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2021-05-02 14:55:07,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:55:07,661 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:07,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:07,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 2 times [2021-05-02 14:55:07,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:07,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407979024] [2021-05-02 14:55:07,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:07,669 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:07,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896217062] [2021-05-02 14:55:07,670 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:07,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:55:07,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:07,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:55:07,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:07,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:07,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 183 proven. 35 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-05-02 14:55:08,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:08,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407979024] [2021-05-02 14:55:08,071 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:08,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896217062] [2021-05-02 14:55:08,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896217062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:08,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:08,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:55:08,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390174928] [2021-05-02 14:55:08,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:55:08,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:08,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:55:08,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:55:08,075 INFO L87 Difference]: Start difference. First operand 157 states and 194 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-02 14:55:08,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:08,390 INFO L93 Difference]: Finished difference Result 190 states and 236 transitions. [2021-05-02 14:55:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:55:08,391 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 129 [2021-05-02 14:55:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:08,392 INFO L225 Difference]: With dead ends: 190 [2021-05-02 14:55:08,392 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 14:55:08,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:55:08,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 14:55:08,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 14:55:08,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 65 states have internal predecessors, (66), 35 states have call successors, (35), 14 states have call predecessors, (35), 13 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 14:55:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2021-05-02 14:55:08,406 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 129 [2021-05-02 14:55:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:08,406 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2021-05-02 14:55:08,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-02 14:55:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2021-05-02 14:55:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 14:55:08,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:08,408 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:55:08,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:55:08,625 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:08,625 INFO L82 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 3 times [2021-05-02 14:55:08,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:08,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68188870] [2021-05-02 14:55:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:08,635 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:08,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360681501] [2021-05-02 14:55:08,635 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:08,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:55:08,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:08,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-02 14:55:08,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:08,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:08,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,699 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 14:55:09,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:09,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:10,365 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-02 14:55:10,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:10,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:10,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:10,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:10,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:10,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:12,838 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-02 14:55:12,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:12,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:12,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 137 proven. 79 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2021-05-02 14:55:13,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:13,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68188870] [2021-05-02 14:55:13,010 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:13,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360681501] [2021-05-02 14:55:13,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360681501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:13,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:13,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 14:55:13,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023047995] [2021-05-02 14:55:13,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 14:55:13,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:13,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 14:55:13,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-02 14:55:13,011 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 18 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 14:55:13,571 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-02 14:55:16,064 WARN L205 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-02 14:55:16,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:16,373 INFO L93 Difference]: Finished difference Result 138 states and 171 transitions. [2021-05-02 14:55:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 14:55:16,374 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 18 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 138 [2021-05-02 14:55:16,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:16,375 INFO L225 Difference]: With dead ends: 138 [2021-05-02 14:55:16,375 INFO L226 Difference]: Without dead ends: 136 [2021-05-02 14:55:16,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 6523.2ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-05-02 14:55:16,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-02 14:55:16,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-05-02 14:55:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 78 states have internal predecessors, (79), 45 states have call successors, (45), 15 states have call predecessors, (45), 14 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 14:55:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 167 transitions. [2021-05-02 14:55:16,411 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 167 transitions. Word has length 138 [2021-05-02 14:55:16,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:16,412 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 167 transitions. [2021-05-02 14:55:16,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 18 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 14:55:16,412 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 167 transitions. [2021-05-02 14:55:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 14:55:16,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:16,418 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:55:16,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:55:16,641 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:16,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:16,641 INFO L82 PathProgramCache]: Analyzing trace with hash -206620137, now seen corresponding path program 1 times [2021-05-02 14:55:16,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:16,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547620273] [2021-05-02 14:55:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:16,649 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:16,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417509176] [2021-05-02 14:55:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:55:16,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 14:55:16,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:16,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:16,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 59 proven. 123 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-05-02 14:55:17,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:17,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547620273] [2021-05-02 14:55:17,294 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:17,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417509176] [2021-05-02 14:55:17,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417509176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:17,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:17,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 14:55:17,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594099808] [2021-05-02 14:55:17,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 14:55:17,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:17,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 14:55:17,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:55:17,295 INFO L87 Difference]: Start difference. First operand 134 states and 167 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 14:55:18,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:18,053 INFO L93 Difference]: Finished difference Result 142 states and 174 transitions. [2021-05-02 14:55:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:55:18,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 143 [2021-05-02 14:55:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:18,055 INFO L225 Difference]: With dead ends: 142 [2021-05-02 14:55:18,055 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 14:55:18,055 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-05-02 14:55:18,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 14:55:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-02 14:55:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 77 states have (on average 1.051948051948052) internal successors, (81), 80 states have internal predecessors, (81), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2021-05-02 14:55:18,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 167 transitions. [2021-05-02 14:55:18,074 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 167 transitions. Word has length 143 [2021-05-02 14:55:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:18,074 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 167 transitions. [2021-05-02 14:55:18,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 14:55:18,074 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 167 transitions. [2021-05-02 14:55:18,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 14:55:18,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:18,075 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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 14:55:18,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:18,297 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:18,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 3 times [2021-05-02 14:55:18,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:18,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051146929] [2021-05-02 14:55:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:18,304 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:18,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737604302] [2021-05-02 14:55:18,304 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:18,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:55:18,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:18,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-02 14:55:18,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:18,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:18,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:19,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:19,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 144 proven. 68 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2021-05-02 14:55:19,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:19,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051146929] [2021-05-02 14:55:19,043 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:19,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737604302] [2021-05-02 14:55:19,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737604302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:19,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:19,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:55:19,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583269030] [2021-05-02 14:55:19,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:55:19,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:19,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:55:19,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:55:19,045 INFO L87 Difference]: Start difference. First operand 137 states and 167 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-02 14:55:25,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:25,704 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2021-05-02 14:55:25,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:55:25,705 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 154 [2021-05-02 14:55:25,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:25,706 INFO L225 Difference]: With dead ends: 148 [2021-05-02 14:55:25,706 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 14:55:25,706 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 436.0ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-05-02 14:55:25,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 14:55:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-05-02 14:55:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 86 states have internal predecessors, (87), 44 states have call successors, (44), 18 states have call predecessors, (44), 17 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2021-05-02 14:55:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 173 transitions. [2021-05-02 14:55:25,724 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 173 transitions. Word has length 154 [2021-05-02 14:55:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:25,724 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 173 transitions. [2021-05-02 14:55:25,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-02 14:55:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 173 transitions. [2021-05-02 14:55:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 14:55:25,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:55:25,725 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 24, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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 14:55:25,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:25,944 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:55:25,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:55:25,944 INFO L82 PathProgramCache]: Analyzing trace with hash -258473082, now seen corresponding path program 4 times [2021-05-02 14:55:25,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:55:25,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6948493] [2021-05-02 14:55:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:55:25,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:55:25,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813470960] [2021-05-02 14:55:25,954 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:55:26,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:55:26,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:55:26,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:55:26,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:55:26,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:55:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1321 backedges. 625 proven. 33 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-05-02 14:55:26,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:55:26,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6948493] [2021-05-02 14:55:26,432 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:55:26,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813470960] [2021-05-02 14:55:26,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813470960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:55:26,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:55:26,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:55:26,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768863504] [2021-05-02 14:55:26,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:55:26,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:55:26,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:55:26,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:55:26,435 INFO L87 Difference]: Start difference. First operand 145 states and 173 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2021-05-02 14:55:26,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:55:26,842 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2021-05-02 14:55:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:55:26,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) Word has length 183 [2021-05-02 14:55:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:55:26,842 INFO L225 Difference]: With dead ends: 145 [2021-05-02 14:55:26,843 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:55:26,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-05-02 14:55:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:55:26,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:55:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 14:55:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:55:26,844 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 183 [2021-05-02 14:55:26,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:55:26,844 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:55:26,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2021-05-02 14:55:26,844 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:55:26,844 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:55:27,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:55:27,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:55:28,458 WARN L205 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2021-05-02 14:55:29,190 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 77 [2021-05-02 14:55:30,061 WARN L205 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2021-05-02 14:55:30,174 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2021-05-02 14:55:30,857 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 77 [2021-05-02 14:55:30,999 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 31 [2021-05-02 14:55:31,177 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 55 [2021-05-02 14:55:31,861 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 77 [2021-05-02 14:55:32,323 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 84 [2021-05-02 14:55:32,348 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-02 14:55:32,348 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-02 14:55:32,349 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-02 14:55:32,349 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:55:32,349 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 14:55:32,349 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:55:32,349 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:55:32,349 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 14:55:32,349 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:55:32,349 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:55:32,349 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-02 14:55:32,349 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-02 14:55:32,349 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-02 14:55:32,349 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-02 14:55:32,350 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~x~0 2) (<= 0 main_~y~0) (<= main_~y~0 2)) [2021-05-02 14:55:32,350 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 74) no Hoare annotation was computed. [2021-05-02 14:55:32,350 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (let ((.cse23 (* main_~y~0 main_~s~0)) (.cse24 (* main_~x~0 main_~q~0)) (.cse13 (* main_~b~0 2))) (let ((.cse8 (= main_~k~0 1)) (.cse4 (+ main_~b~0 main_~c~0)) (.cse15 (= main_~b~0 main_~x~0)) (.cse16 (= main_~s~0 0)) (.cse14 (= main_~r~0 1)) (.cse17 (= main_~q~0 1)) (.cse18 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse19 (< main_~b~0 main_~a~0)) (.cse11 (+ .cse13 main_~c~0)) (.cse20 (= main_~a~0 main_~y~0)) (.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse22 (<= 1 main_~x~0)) (.cse1 (= main_~a~0 main_~x~0)) (.cse21 (= main_~k~0 0)) (.cse12 (<= main_~x~0 2)) (.cse2 (<= 1 main_~b~0)) (.cse3 (= (* main_~x~0 main_~y~0) main_~xy~0)) (.cse5 (= main_~r~0 0)) (.cse6 (= main_~b~0 main_~y~0)) (.cse7 (= main_~b~0 (+ .cse23 .cse24))) (.cse9 (= main_~p~0 1)) (.cse10 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 (<= main_~b~0 main_~x~0) .cse3 (<= .cse4 2) .cse5 .cse6 .cse7 .cse8 (= main_~x~0 .cse4) .cse9 .cse10) (and .cse0 .cse1 (<= 0 main_~c~0) (= .cse11 main_~x~0) .cse12 .cse2 .cse3 .cse5 .cse6 .cse7 (= .cse13 (* main_~k~0 main_~b~0)) .cse9 .cse10) (and .cse0 .cse14 .cse15 .cse16 .cse2 .cse17 .cse3 .cse18 .cse19 .cse8 (<= main_~a~0 2) (= main_~a~0 .cse4) .cse20) (and .cse0 .cse14 .cse21 .cse15 (<= main_~c~0 2) .cse16 .cse2 .cse17 (= main_~c~0 main_~y~0) .cse3 .cse18 .cse19 .cse20) (and .cse0 .cse22 .cse14 .cse12 .cse2 .cse17 (= (+ .cse23 (* main_~y~0 main_~b~0) .cse24) (+ (* main_~x~0 main_~y~0 main_~q~0) main_~b~0)) (= main_~k~0 2) .cse3 .cse18 .cse19 (= .cse11 main_~y~0) .cse20 (<= (+ (* 2 main_~b~0) main_~c~0) 2)) (and .cse0 .cse22 .cse1 .cse21 .cse12 .cse2 (<= main_~y~0 2) .cse3 .cse5 .cse6 .cse7 (= main_~c~0 main_~a~0) .cse9 .cse10)))) [2021-05-02 14:55:32,350 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (let ((.cse25 (* main_~b~0 2))) (let ((.cse22 (* main_~y~0 main_~s~0)) (.cse23 (* main_~x~0 main_~q~0)) (.cse24 (+ .cse25 main_~c~0)) (.cse11 (+ main_~b~0 main_~c~0))) (let ((.cse7 (<= .cse11 2)) (.cse10 (= main_~k~0 1)) (.cse2 (= main_~b~0 main_~x~0)) (.cse3 (= main_~s~0 0)) (.cse12 (= main_~a~0 main_~y~0)) (.cse1 (= main_~r~0 1)) (.cse5 (= main_~q~0 1)) (.cse8 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse9 (< main_~b~0 main_~a~0)) (.cse19 (= main_~k~0 0)) (.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse20 (= .cse24 main_~a~0)) (.cse13 (= main_~a~0 main_~x~0)) (.cse21 (<= main_~x~0 2)) (.cse4 (<= 1 main_~b~0)) (.cse6 (= (* main_~x~0 main_~y~0) main_~xy~0)) (.cse14 (= main_~r~0 0)) (.cse15 (= main_~b~0 main_~y~0)) (.cse16 (= main_~b~0 (+ .cse22 .cse23))) (.cse17 (= main_~p~0 1)) (.cse18 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 (= main_~a~0 .cse11) .cse12) (and .cse0 .cse13 .cse4 (<= main_~b~0 main_~x~0) .cse6 .cse7 .cse14 .cse15 .cse16 .cse10 (= main_~x~0 .cse11) .cse17 .cse18) (and .cse0 .cse1 .cse19 .cse2 (<= main_~c~0 2) .cse3 .cse4 .cse5 (= main_~c~0 main_~y~0) .cse6 .cse8 .cse9 .cse12) (and .cse0 .cse20 .cse1 .cse21 .cse4 .cse5 (= (+ .cse22 (* main_~y~0 main_~b~0) .cse23) (+ (* main_~x~0 main_~y~0 main_~q~0) main_~b~0)) (= main_~k~0 2) .cse6 (<= 0 main_~x~0) .cse8 .cse9 (= .cse24 main_~y~0) (<= (+ (* 2 main_~b~0) main_~c~0) 2)) (and .cse0 (<= 1 main_~x~0) .cse13 .cse19 .cse21 .cse4 (<= main_~y~0 2) .cse6 .cse14 .cse15 .cse16 (= main_~c~0 main_~a~0) .cse17 .cse18) (and .cse0 .cse20 .cse13 (<= 0 main_~c~0) .cse21 .cse4 .cse6 .cse14 .cse15 .cse16 (= .cse25 (* main_~k~0 main_~b~0)) .cse17 .cse18))))) [2021-05-02 14:55:32,350 INFO L194 CegarLoopUtils]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse23 (* main_~y~0 main_~s~0)) (.cse24 (* main_~x~0 main_~q~0)) (.cse13 (* main_~b~0 2))) (let ((.cse8 (= main_~k~0 1)) (.cse4 (+ main_~b~0 main_~c~0)) (.cse15 (= main_~b~0 main_~x~0)) (.cse16 (= main_~s~0 0)) (.cse14 (= main_~r~0 1)) (.cse17 (= main_~q~0 1)) (.cse18 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse19 (< main_~b~0 main_~a~0)) (.cse11 (+ .cse13 main_~c~0)) (.cse20 (= main_~a~0 main_~y~0)) (.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse22 (<= 1 main_~x~0)) (.cse1 (= main_~a~0 main_~x~0)) (.cse21 (= main_~k~0 0)) (.cse12 (<= main_~x~0 2)) (.cse2 (<= 1 main_~b~0)) (.cse3 (= (* main_~x~0 main_~y~0) main_~xy~0)) (.cse5 (= main_~r~0 0)) (.cse6 (= main_~b~0 main_~y~0)) (.cse7 (= main_~b~0 (+ .cse23 .cse24))) (.cse9 (= main_~p~0 1)) (.cse10 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 (<= main_~b~0 main_~x~0) .cse3 (<= .cse4 2) .cse5 .cse6 .cse7 .cse8 (= main_~x~0 .cse4) .cse9 .cse10) (and .cse0 .cse1 (<= 0 main_~c~0) (= .cse11 main_~x~0) .cse12 .cse2 .cse3 .cse5 .cse6 .cse7 (= .cse13 (* main_~k~0 main_~b~0)) .cse9 .cse10) (and .cse0 .cse14 .cse15 .cse16 .cse2 .cse17 .cse3 .cse18 .cse19 .cse8 (<= main_~a~0 2) (= main_~a~0 .cse4) .cse20) (and .cse0 .cse14 .cse21 .cse15 (<= main_~c~0 2) .cse16 .cse2 .cse17 (= main_~c~0 main_~y~0) .cse3 .cse18 .cse19 .cse20) (and .cse0 .cse22 .cse14 .cse12 .cse2 .cse17 (= (+ .cse23 (* main_~y~0 main_~b~0) .cse24) (+ (* main_~x~0 main_~y~0 main_~q~0) main_~b~0)) (= main_~k~0 2) .cse3 .cse18 .cse19 (= .cse11 main_~y~0) .cse20 (<= (+ (* 2 main_~b~0) main_~c~0) 2)) (and .cse0 .cse22 .cse1 .cse21 .cse12 .cse2 (<= main_~y~0 2) .cse3 .cse5 .cse6 .cse7 (= main_~c~0 main_~a~0) .cse9 .cse10)))) [2021-05-02 14:55:32,350 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 74) no Hoare annotation was computed. [2021-05-02 14:55:32,351 INFO L198 CegarLoopUtils]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-05-02 14:55:32,351 INFO L194 CegarLoopUtils]: At program point L71(line 71) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 2))) (or (and (= main_~p~0 0) (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= main_~x~0 2) (<= 1 main_~y~0) .cse0) (and (= main_~r~0 0) (= main_~a~0 main_~x~0) (< main_~b~0 main_~a~0) (<= 0 main_~b~0) (= main_~p~0 1) .cse0 (= main_~y~0 (+ (* main_~a~0 2) main_~b~0))))) [2021-05-02 14:55:32,351 INFO L194 CegarLoopUtils]: At program point L38(line 38) the Hoare annotation is: (let ((.cse0 (div (+ (* main_~c~0 (- 1)) 2) 2))) (and (= (* main_~y~0 main_~y~0) main_~yy~0) (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (<= main_~x~0 2) (<= 1 main_~b~0) (<= main_~y~0 2) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) (< 0 (+ .cse0 main_~c~0)) (= main_~b~0 main_~y~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~p~0 1) (< main_~c~0 .cse0) (= main_~s~0 1))) [2021-05-02 14:55:32,351 INFO L194 CegarLoopUtils]: At program point L38-1(line 38) the Hoare annotation is: (let ((.cse0 (div (+ (* main_~c~0 (- 1)) 2) 2))) (and (= (* main_~y~0 main_~y~0) main_~yy~0) (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (<= main_~x~0 2) (<= 1 main_~b~0) (<= main_~y~0 2) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) (< 0 (+ .cse0 main_~c~0)) (= main_~b~0 main_~y~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~p~0 1) (< main_~c~0 .cse0) (= main_~s~0 1))) [2021-05-02 14:55:32,351 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 74) the Hoare annotation is: true [2021-05-02 14:55:32,351 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-02 14:55:32,351 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2021-05-02 14:55:32,351 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2) (<= 0 main_~y~0) (<= main_~y~0 2)) [2021-05-02 14:55:32,351 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-02 14:55:32,351 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-02 14:55:32,351 INFO L198 CegarLoopUtils]: For program point L51(lines 47 56) no Hoare annotation was computed. [2021-05-02 14:55:32,352 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (let ((.cse23 (* main_~y~0 main_~s~0)) (.cse24 (* main_~x~0 main_~q~0)) (.cse13 (* main_~b~0 2))) (let ((.cse8 (= main_~k~0 1)) (.cse4 (+ main_~b~0 main_~c~0)) (.cse15 (= main_~b~0 main_~x~0)) (.cse16 (= main_~s~0 0)) (.cse14 (= main_~r~0 1)) (.cse17 (= main_~q~0 1)) (.cse18 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse19 (< main_~b~0 main_~a~0)) (.cse11 (+ .cse13 main_~c~0)) (.cse20 (= main_~a~0 main_~y~0)) (.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse22 (<= 1 main_~x~0)) (.cse1 (= main_~a~0 main_~x~0)) (.cse21 (= main_~k~0 0)) (.cse12 (<= main_~x~0 2)) (.cse2 (<= 1 main_~b~0)) (.cse3 (= (* main_~x~0 main_~y~0) main_~xy~0)) (.cse5 (= main_~r~0 0)) (.cse6 (= main_~b~0 main_~y~0)) (.cse7 (= main_~b~0 (+ .cse23 .cse24))) (.cse9 (= main_~p~0 1)) (.cse10 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 (<= main_~b~0 main_~x~0) .cse3 (<= .cse4 2) .cse5 .cse6 .cse7 .cse8 (= main_~x~0 .cse4) .cse9 .cse10) (and .cse0 .cse1 (<= 0 main_~c~0) (= .cse11 main_~x~0) .cse12 .cse2 .cse3 .cse5 .cse6 .cse7 (= .cse13 (* main_~k~0 main_~b~0)) .cse9 .cse10) (and .cse0 .cse14 .cse15 .cse16 .cse2 .cse17 .cse3 .cse18 .cse19 .cse8 (<= main_~a~0 2) (= main_~a~0 .cse4) .cse20) (and .cse0 .cse14 .cse21 .cse15 (<= main_~c~0 2) .cse16 .cse2 .cse17 (= main_~c~0 main_~y~0) .cse3 .cse18 .cse19 .cse20) (and .cse0 .cse22 .cse14 .cse12 .cse2 .cse17 (= (+ .cse23 (* main_~y~0 main_~b~0) .cse24) (+ (* main_~x~0 main_~y~0 main_~q~0) main_~b~0)) (= main_~k~0 2) .cse3 .cse18 .cse19 (= .cse11 main_~y~0) .cse20 (<= (+ (* 2 main_~b~0) main_~c~0) 2)) (and .cse0 .cse22 .cse1 .cse21 .cse12 .cse2 (<= main_~y~0 2) .cse3 .cse5 .cse6 .cse7 (= main_~c~0 main_~a~0) .cse9 .cse10)))) [2021-05-02 14:55:32,352 INFO L194 CegarLoopUtils]: At program point L47-2(lines 47 56) the Hoare annotation is: (let ((.cse25 (* main_~b~0 2))) (let ((.cse22 (* main_~y~0 main_~s~0)) (.cse23 (* main_~x~0 main_~q~0)) (.cse24 (+ .cse25 main_~c~0)) (.cse11 (+ main_~b~0 main_~c~0))) (let ((.cse7 (<= .cse11 2)) (.cse10 (= main_~k~0 1)) (.cse2 (= main_~b~0 main_~x~0)) (.cse3 (= main_~s~0 0)) (.cse12 (= main_~a~0 main_~y~0)) (.cse1 (= main_~r~0 1)) (.cse5 (= main_~q~0 1)) (.cse8 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse9 (< main_~b~0 main_~a~0)) (.cse19 (= main_~k~0 0)) (.cse0 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse20 (= .cse24 main_~a~0)) (.cse13 (= main_~a~0 main_~x~0)) (.cse21 (<= main_~x~0 2)) (.cse4 (<= 1 main_~b~0)) (.cse6 (= (* main_~x~0 main_~y~0) main_~xy~0)) (.cse14 (= main_~r~0 0)) (.cse15 (= main_~b~0 main_~y~0)) (.cse16 (= main_~b~0 (+ .cse22 .cse23))) (.cse17 (= main_~p~0 1)) (.cse18 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 (= main_~a~0 .cse11) .cse12) (and .cse0 .cse13 .cse4 (<= main_~b~0 main_~x~0) .cse6 .cse7 .cse14 .cse15 .cse16 .cse10 (= main_~x~0 .cse11) .cse17 .cse18) (and .cse0 .cse1 .cse19 .cse2 (<= main_~c~0 2) .cse3 .cse4 .cse5 (= main_~c~0 main_~y~0) .cse6 .cse8 .cse9 .cse12) (and .cse0 .cse20 .cse1 .cse21 .cse4 .cse5 (= (+ .cse22 (* main_~y~0 main_~b~0) .cse23) (+ (* main_~x~0 main_~y~0 main_~q~0) main_~b~0)) (= main_~k~0 2) .cse6 (<= 0 main_~x~0) .cse8 .cse9 (= .cse24 main_~y~0) (<= (+ (* 2 main_~b~0) main_~c~0) 2)) (and .cse0 (<= 1 main_~x~0) .cse13 .cse19 .cse21 .cse4 (<= main_~y~0 2) .cse6 .cse14 .cse15 .cse16 (= main_~c~0 main_~a~0) .cse17 .cse18) (and .cse0 .cse20 .cse13 (<= 0 main_~c~0) .cse21 .cse4 .cse6 .cse14 .cse15 .cse16 (= .cse25 (* main_~k~0 main_~b~0)) .cse17 .cse18))))) [2021-05-02 14:55:32,352 INFO L198 CegarLoopUtils]: For program point L47-3(lines 47 56) no Hoare annotation was computed. [2021-05-02 14:55:32,352 INFO L194 CegarLoopUtils]: At program point L41-1(lines 39 68) the Hoare annotation is: (let ((.cse17 (div (+ (* main_~c~0 (- 1)) 2) 2))) (let ((.cse0 (= main_~p~0 0)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse10 (< main_~b~0 main_~a~0)) (.cse14 (<= main_~a~0 2)) (.cse3 (= main_~q~0 1)) (.cse4 (= (* main_~y~0 main_~y~0) main_~yy~0)) (.cse5 (= main_~a~0 main_~x~0)) (.cse2 (<= main_~x~0 2)) (.cse13 (<= 1 main_~b~0)) (.cse6 (<= main_~y~0 2)) (.cse7 (= (* main_~x~0 main_~y~0) main_~xy~0)) (.cse8 (= main_~r~0 0)) (.cse9 (< 0 (+ .cse17 main_~c~0))) (.cse15 (* main_~y~0 main_~s~0)) (.cse11 (= main_~p~0 1)) (.cse12 (< main_~c~0 .cse17))) (or (and (< main_~x~0 (* 2 main_~y~0)) .cse0 (= main_~x~0 (+ main_~y~0 main_~b~0)) .cse1 .cse2 .cse3 (<= main_~y~0 main_~x~0) (= (+ main_~s~0 1) 0)) (and .cse4 (= main_~s~0 (+ (* (div 0 main_~y~0) main_~q~0) 1)) .cse5 .cse6 (= (+ main_~q~0 2) 0) .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 (<= (* 2 main_~x~0) main_~y~0) (= main_~y~0 (+ (* main_~a~0 2) main_~b~0))) (and .cse4 (<= 1 main_~c~0) (= main_~r~0 1) (= main_~b~0 main_~x~0) (<= main_~c~0 2) (= main_~s~0 0) .cse13 .cse3 .cse7 .cse1 .cse10 .cse14 (= main_~a~0 main_~y~0)) (let ((.cse16 (* main_~y~0 2))) (and .cse0 (<= 0 main_~x~0) (<= 0 main_~c~0) .cse1 .cse10 .cse2 .cse14 (= (+ .cse15 .cse16) 0) (<= 0 main_~b~0) .cse3 (= (+ .cse16 main_~b~0) main_~x~0) .cse12)) (and .cse4 (<= 1 main_~x~0) .cse5 .cse2 .cse13 .cse6 .cse7 .cse8 .cse9 (= main_~b~0 main_~y~0) (= main_~b~0 (+ .cse15 (* main_~x~0 main_~q~0))) .cse11 .cse12 (= main_~s~0 1))))) [2021-05-02 14:55:32,352 INFO L198 CegarLoopUtils]: For program point L72(line 72) no Hoare annotation was computed. [2021-05-02 14:55:32,353 INFO L194 CegarLoopUtils]: At program point L41-2(lines 41 68) the Hoare annotation is: (let ((.cse0 (= main_~p~0 0)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse2 (<= main_~x~0 2)) (.cse3 (= main_~q~0 1))) (or (and (< main_~x~0 (* 2 main_~y~0)) .cse0 (= main_~x~0 (+ main_~y~0 main_~b~0)) .cse1 .cse2 .cse3 (<= main_~y~0 main_~x~0) (= (+ main_~s~0 1) 0)) (and (= main_~s~0 (+ (* (div 0 main_~y~0) main_~q~0) 1)) (= main_~y~0 (+ (* main_~x~0 2) main_~b~0)) (= main_~r~0 0) (<= 0 main_~b~0) (<= main_~y~0 2) (= main_~p~0 1) (< 0 main_~a~0) (= (+ main_~q~0 2) 0) (= main_~y~0 (+ (* main_~a~0 2) main_~b~0))) (let ((.cse4 (* main_~y~0 2))) (and .cse0 (< main_~b~0 main_~a~0) .cse1 .cse2 (= .cse4 main_~x~0) (= (+ (* main_~y~0 main_~s~0) .cse4) 0) .cse3 (< 0 main_~y~0) (= (+ .cse4 main_~b~0) main_~x~0))))) [2021-05-02 14:55:32,353 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-02 14:55:32,353 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-02 14:55:32,353 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-02 14:55:32,353 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-02 14:55:32,353 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-02 14:55:32,353 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-02 14:55:32,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:55:32 BoogieIcfgContainer [2021-05-02 14:55:32,387 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:55:32,387 INFO L168 Benchmark]: Toolchain (without parser) took 43231.96 ms. Allocated memory was 191.9 MB in the beginning and 335.5 MB in the end (delta: 143.7 MB). Free memory was 156.9 MB in the beginning and 204.4 MB in the end (delta: -47.6 MB). Peak memory consumption was 185.9 MB. Max. memory is 8.0 GB. [2021-05-02 14:55:32,388 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 191.9 MB. Free memory is still 173.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:55:32,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.95 ms. Allocated memory is still 191.9 MB. Free memory was 156.5 MB in the beginning and 146.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 14:55:32,388 INFO L168 Benchmark]: Boogie Preprocessor took 25.32 ms. Allocated memory is still 191.9 MB. Free memory was 146.4 MB in the beginning and 144.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:55:32,388 INFO L168 Benchmark]: RCFGBuilder took 349.41 ms. Allocated memory is still 191.9 MB. Free memory was 144.9 MB in the beginning and 158.5 MB in the end (delta: -13.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:55:32,388 INFO L168 Benchmark]: TraceAbstraction took 42635.72 ms. Allocated memory was 191.9 MB in the beginning and 335.5 MB in the end (delta: 143.7 MB). Free memory was 158.0 MB in the beginning and 204.4 MB in the end (delta: -46.5 MB). Peak memory consumption was 187.5 MB. Max. memory is 8.0 GB. [2021-05-02 14:55:32,388 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 191.9 MB. Free memory is still 173.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 215.95 ms. Allocated memory is still 191.9 MB. Free memory was 156.5 MB in the beginning and 146.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.32 ms. Allocated memory is still 191.9 MB. Free memory was 146.4 MB in the beginning and 144.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 349.41 ms. Allocated memory is still 191.9 MB. Free memory was 144.9 MB in the beginning and 158.5 MB in the end (delta: -13.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 42635.72 ms. Allocated memory was 191.9 MB in the beginning and 335.5 MB in the end (delta: 143.7 MB). Free memory was 158.0 MB in the beginning and 204.4 MB in the end (delta: -46.5 MB). Peak memory consumption was 187.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 37218.3ms, OverallIterations: 21, TraceHistogramMax: 25, EmptinessCheckTime: 44.2ms, AutomataDifference: 20058.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 5302.3ms, InitialAbstractionConstructionTime: 10.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 943 SDtfs, 735 SDslu, 5510 SDs, 0 SdLazy, 6076 SolverSat, 759 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 14117.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1989 GetRequests, 1668 SyntacticMatches, 7 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 10246.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=12, InterpolantAutomatonStates: 251, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 445.5ms AutomataMinimizationTime, 21 MinimizatonAttempts, 85 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 20 LocationsWithAnnotation, 192 PreInvPairs, 237 NumberOfFragments, 2397 HoareAnnotationTreeSize, 192 FomulaSimplifications, 8238 FormulaSimplificationTreeSizeReduction, 389.5ms HoareSimplificationTime, 20 FomulaSimplificationsInter, 4688 FormulaSimplificationTreeSizeReductionInter, 4895.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 197.5ms SsaConstructionTime, 686.1ms SatisfiabilityAnalysisTime, 10547.2ms InterpolantComputationTime, 1927 NumberOfCodeBlocks, 1752 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1906 ConstructedInterpolants, 0 QuantifiedInterpolants, 10175 SizeOfPredicates, 144 NumberOfNonLiveVariables, 5064 ConjunctsInSsa, 741 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 5682/6378 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: ((((((((((((((((y * y == yy && r == 1) && b == x) && s == 0) && 1 <= b) && q == 1) && x * y == xy) && b + c <= 2) && a == y * r + x * p) && b < a) && k == 1) && a == b + c) && a == y) || ((((((((((((y * y == yy && a == x) && 1 <= b) && b <= x) && x * y == xy) && b + c <= 2) && r == 0) && b == y) && b == y * s + x * q) && k == 1) && x == b + c) && p == 1) && s == 1)) || ((((((((((((y * y == yy && r == 1) && k == 0) && b == x) && c <= 2) && s == 0) && 1 <= b) && q == 1) && c == y) && x * y == xy) && a == y * r + x * p) && b < a) && a == y)) || (((((((((((((y * y == yy && b * 2 + c == a) && r == 1) && x <= 2) && 1 <= b) && q == 1) && y * s + y * b + x * q == x * y * q + b) && k == 2) && x * y == xy) && 0 <= x) && a == y * r + x * p) && b < a) && b * 2 + c == y) && 2 * b + c <= 2)) || (((((((((((((y * y == yy && 1 <= x) && a == x) && k == 0) && x <= 2) && 1 <= b) && y <= 2) && x * y == xy) && r == 0) && b == y) && b == y * s + x * q) && c == a) && p == 1) && s == 1)) || ((((((((((((y * y == yy && b * 2 + c == a) && a == x) && 0 <= c) && x <= 2) && 1 <= b) && x * y == xy) && r == 0) && b == y) && b == y * s + x * q) && b * 2 == k * b) && p == 1) && s == 1) - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: ((((((((((x < 2 * y && p == 0) && x == y + b) && a == y * r + x * p) && x <= 2) && q == 1) && y <= x) && s + 1 == 0) || ((((((((((((y * y == yy && s == 0 / y * q + 1) && a == x) && y <= 2) && q + 2 == 0) && x * y == xy) && r == 0) && 0 < (c * -1 + 2) / 2 + c) && b < a) && p == 1) && c < (c * -1 + 2) / 2) && 2 * x <= y) && y == a * 2 + b)) || ((((((((((((y * y == yy && 1 <= c) && r == 1) && b == x) && c <= 2) && s == 0) && 1 <= b) && q == 1) && x * y == xy) && a == y * r + x * p) && b < a) && a <= 2) && a == y)) || (((((((((((p == 0 && 0 <= x) && 0 <= c) && a == y * r + x * p) && b < a) && x <= 2) && a <= 2) && y * s + y * 2 == 0) && 0 <= b) && q == 1) && y * 2 + b == x) && c < (c * -1 + 2) / 2)) || (((((((((((((y * y == yy && 1 <= x) && a == x) && x <= 2) && 1 <= b) && y <= 2) && x * y == xy) && r == 0) && 0 < (c * -1 + 2) / 2 + c) && b == y) && b == y * s + x * q) && p == 1) && c < (c * -1 + 2) / 2) && s == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...