/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/egcd-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:28:28,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:28:28,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:28:28,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:28:28,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:28:28,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:28:28,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:28:28,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:28:28,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:28:28,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:28:28,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:28:28,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:28:28,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:28:28,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:28:28,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:28:28,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:28:28,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:28:29,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:28:29,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:28:29,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:28:29,017 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:28:29,049 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:28:29,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:28:29,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:28:29,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:28:29,051 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:28:29,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:28:29,051 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:28:29,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:28:29,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:28:29,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:28:29,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:28:29,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:28:29,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:28:29,053 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:28:29,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:28:29,054 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:28:29,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:28:29,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:28:29,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:28:29,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:28:29,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:28:29,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:28:29,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:28:29,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:28:29,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:28:29,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:28:29,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:28:29,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:28:29,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:28:29,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:28:29,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:28:29,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:28:29,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:28:29,366 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:28:29,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c [2021-05-06 02:28:29,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/577d3ffaf/3bd22bfdc60a46ab8758eada6d7ba2e5/FLAGa471968d2 [2021-05-06 02:28:29,839 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:28:29,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c [2021-05-06 02:28:29,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/577d3ffaf/3bd22bfdc60a46ab8758eada6d7ba2e5/FLAGa471968d2 [2021-05-06 02:28:29,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/577d3ffaf/3bd22bfdc60a46ab8758eada6d7ba2e5 [2021-05-06 02:28:29,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:28:29,856 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:28:29,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:28:29,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:28:29,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:28:29,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:28:29" (1/1) ... [2021-05-06 02:28:29,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16fef675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:29, skipping insertion in model container [2021-05-06 02:28:29,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:28:29" (1/1) ... [2021-05-06 02:28:29,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:28:29,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:28:29,978 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/egcd-ll_valuebound2.c[489,502] [2021-05-06 02:28:30,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:28:30,016 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:28:30,068 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/egcd-ll_valuebound2.c[489,502] [2021-05-06 02:28:30,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:28:30,097 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:28:30,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:30 WrapperNode [2021-05-06 02:28:30,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:28:30,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:28:30,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:28:30,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:28:30,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:30" (1/1) ... [2021-05-06 02:28:30,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:30" (1/1) ... [2021-05-06 02:28:30,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:30" (1/1) ... [2021-05-06 02:28:30,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:30" (1/1) ... [2021-05-06 02:28:30,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:30" (1/1) ... [2021-05-06 02:28:30,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:30" (1/1) ... [2021-05-06 02:28:30,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:30" (1/1) ... [2021-05-06 02:28:30,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:28:30,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:28:30,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:28:30,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:28:30,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:28:30,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:28:30,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:28:30,203 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:28:30,203 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:28:30,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:28:30,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:28:30,204 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:28:30,204 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:28:30,204 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:28:30,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:28:30,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:28:30,205 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:28:30,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:28:30,205 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:28:30,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:28:30,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:28:30,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:28:30,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:28:30,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:28:30,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:28:30,410 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:28:30,410 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:28:30,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:28:30 BoogieIcfgContainer [2021-05-06 02:28:30,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:28:30,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:28:30,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:28:30,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:28:30,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:28:29" (1/3) ... [2021-05-06 02:28:30,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4161be4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:28:30, skipping insertion in model container [2021-05-06 02:28:30,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:30" (2/3) ... [2021-05-06 02:28:30,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4161be4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:28:30, skipping insertion in model container [2021-05-06 02:28:30,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:28:30" (3/3) ... [2021-05-06 02:28:30,417 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound2.c [2021-05-06 02:28:30,421 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:28:30,423 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:28:30,438 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:28:30,453 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:28:30,453 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:28:30,453 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:28:30,454 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:28:30,454 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:28:30,454 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:28:30,454 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:28:30,454 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:28:30,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:28:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:28:30,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:30,469 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:30,470 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:30,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:30,473 INFO L82 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2021-05-06 02:28:30,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:30,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954731933] [2021-05-06 02:28:30,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:30,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:28:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:30,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:28:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:30,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:28:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:30,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:28:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:30,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:28:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:28:30,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:30,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954731933] [2021-05-06 02:28:30,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954731933] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:30,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:30,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:28:30,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198278279] [2021-05-06 02:28:30,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:28:30,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:30,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:28:30,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:28:30,704 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:28:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:30,823 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-05-06 02:28:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:28:30,824 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:28:30,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:30,830 INFO L225 Difference]: With dead ends: 67 [2021-05-06 02:28:30,830 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 02:28:30,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:28:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 02:28:30,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 02:28:30,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:28:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 02:28:30,869 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-06 02:28:30,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:30,869 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 02:28:30,870 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:28:30,870 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 02:28:30,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:28:30,871 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:30,871 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:30,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:28:30,872 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:30,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:30,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2021-05-06 02:28:30,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:30,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651706245] [2021-05-06 02:28:30,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:30,891 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:30,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734932099] [2021-05-06 02:28:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:31,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:28:31,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:31,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:28:31,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:31,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651706245] [2021-05-06 02:28:31,179 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:31,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734932099] [2021-05-06 02:28:31,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734932099] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:31,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:31,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:31,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169497602] [2021-05-06 02:28:31,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:31,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:31,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:31,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:31,182 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:28:31,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:31,232 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-05-06 02:28:31,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:31,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-06 02:28:31,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:31,234 INFO L225 Difference]: With dead ends: 48 [2021-05-06 02:28:31,234 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 02:28:31,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:31,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 02:28:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-06 02:28:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:28:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-06 02:28:31,246 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-06 02:28:31,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:31,246 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-06 02:28:31,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:28:31,246 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-06 02:28:31,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 02:28:31,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:31,247 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:31,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:28:31,467 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:31,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:31,468 INFO L82 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2021-05-06 02:28:31,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:31,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15953146] [2021-05-06 02:28:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:31,480 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:31,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301589906] [2021-05-06 02:28:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:31,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:28:31,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:31,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:28:31,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:31,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15953146] [2021-05-06 02:28:31,779 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:31,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301589906] [2021-05-06 02:28:31,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301589906] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:31,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:31,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 02:28:31,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394738815] [2021-05-06 02:28:31,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:28:31,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:31,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:28:31,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:31,781 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 02:28:31,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:31,909 INFO L93 Difference]: Finished difference Result 70 states and 102 transitions. [2021-05-06 02:28:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:28:31,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2021-05-06 02:28:31,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:31,912 INFO L225 Difference]: With dead ends: 70 [2021-05-06 02:28:31,912 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 02:28:31,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 02:28:31,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-06 02:28:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 02:28:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-06 02:28:31,926 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-06 02:28:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:31,926 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-06 02:28:31,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 02:28:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-06 02:28:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 02:28:31,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:31,927 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 02:28:32,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:32,147 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:32,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2021-05-06 02:28:32,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:32,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921085729] [2021-05-06 02:28:32,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:32,161 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:32,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891616255] [2021-05-06 02:28:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:32,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:28:32,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:32,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 02:28:32,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:32,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921085729] [2021-05-06 02:28:32,397 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:32,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891616255] [2021-05-06 02:28:32,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891616255] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:32,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:32,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 02:28:32,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768809988] [2021-05-06 02:28:32,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:28:32,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:32,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:28:32,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:32,398 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 02:28:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:32,531 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-05-06 02:28:32,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:28:32,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2021-05-06 02:28:32,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:32,532 INFO L225 Difference]: With dead ends: 68 [2021-05-06 02:28:32,533 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 02:28:32,533 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:32,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 02:28:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 02:28:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:28:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-06 02:28:32,543 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-06 02:28:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:32,544 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-06 02:28:32,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 02:28:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-06 02:28:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 02:28:32,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:32,545 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 02:28:32,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:32,763 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:32,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:32,764 INFO L82 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2021-05-06 02:28:32,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:32,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57085173] [2021-05-06 02:28:32,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:32,775 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:32,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036891903] [2021-05-06 02:28:32,775 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 [2021-05-06 02:28:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:32,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:28:32,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:32,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 02:28:32,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:32,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57085173] [2021-05-06 02:28:32,898 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:32,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036891903] [2021-05-06 02:28:32,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036891903] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:32,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:32,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:32,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622903112] [2021-05-06 02:28:32,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:32,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:32,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:32,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:32,900 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 02:28:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:32,932 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-05-06 02:28:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:32,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-06 02:28:32,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:32,933 INFO L225 Difference]: With dead ends: 70 [2021-05-06 02:28:32,933 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 02:28:32,934 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 02:28:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-06 02:28:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:28:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-06 02:28:32,944 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-06 02:28:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:32,944 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-06 02:28:32,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 02:28:32,944 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-06 02:28:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 02:28:32,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:32,945 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2021-05-06 02:28:33,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:33,165 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:33,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:33,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1107651435, now seen corresponding path program 1 times [2021-05-06 02:28:33,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:33,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849562977] [2021-05-06 02:28:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:33,175 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:33,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852367020] [2021-05-06 02:28:33,176 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 [2021-05-06 02:28:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:33,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:28:33,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:33,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 02:28:33,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:33,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849562977] [2021-05-06 02:28:33,315 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:33,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852367020] [2021-05-06 02:28:33,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852367020] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:33,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:33,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:33,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053584060] [2021-05-06 02:28:33,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:33,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:33,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:33,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:33,317 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:28:33,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:33,354 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-05-06 02:28:33,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:33,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-06 02:28:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:33,355 INFO L225 Difference]: With dead ends: 84 [2021-05-06 02:28:33,355 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 02:28:33,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:33,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 02:28:33,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-06 02:28:33,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 02:28:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-06 02:28:33,364 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-06 02:28:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:33,365 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-06 02:28:33,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:28:33,365 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-06 02:28:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 02:28:33,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:33,366 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:33,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:28:33,587 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:33,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:33,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2021-05-06 02:28:33,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:33,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867083382] [2021-05-06 02:28:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:33,596 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:33,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362600820] [2021-05-06 02:28:33,596 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 [2021-05-06 02:28:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:33,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:28:33,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:33,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 02:28:33,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:33,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867083382] [2021-05-06 02:28:33,741 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:33,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362600820] [2021-05-06 02:28:33,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362600820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:33,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:33,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:33,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286167680] [2021-05-06 02:28:33,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:33,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:33,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:33,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:33,742 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:33,845 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2021-05-06 02:28:33,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:33,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-06 02:28:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:33,846 INFO L225 Difference]: With dead ends: 88 [2021-05-06 02:28:33,846 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 02:28:33,847 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 02:28:33,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-06 02:28:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 02:28:33,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-06 02:28:33,858 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-06 02:28:33,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:33,858 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-06 02:28:33,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-06 02:28:33,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 02:28:33,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:33,859 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:34,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:34,079 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:34,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:34,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 1 times [2021-05-06 02:28:34,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:34,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326217474] [2021-05-06 02:28:34,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:34,087 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:34,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505581029] [2021-05-06 02:28:34,087 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 [2021-05-06 02:28:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:28:34,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:34,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 02:28:34,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:34,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326217474] [2021-05-06 02:28:34,373 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:34,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505581029] [2021-05-06 02:28:34,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505581029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:34,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:34,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:28:34,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648207237] [2021-05-06 02:28:34,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:28:34,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:34,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:28:34,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:34,375 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:28:34,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:34,530 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2021-05-06 02:28:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:28:34,531 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-06 02:28:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:34,532 INFO L225 Difference]: With dead ends: 118 [2021-05-06 02:28:34,532 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 02:28:34,533 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:28:34,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 02:28:34,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-06 02:28:34,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 02:28:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-06 02:28:34,545 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-06 02:28:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:34,545 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-06 02:28:34,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:28:34,545 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-06 02:28:34,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:28:34,546 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:34,546 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:34,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:34,766 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:34,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:34,766 INFO L82 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2021-05-06 02:28:34,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:34,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392505496] [2021-05-06 02:28:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:34,774 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:34,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106314183] [2021-05-06 02:28:34,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:34,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:34,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:34,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 02:28:34,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:34,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:28:35,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:35,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392505496] [2021-05-06 02:28:35,083 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:35,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106314183] [2021-05-06 02:28:35,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106314183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:35,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:35,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:28:35,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090288905] [2021-05-06 02:28:35,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:28:35,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:35,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:28:35,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:35,084 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 02:28:35,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:35,229 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2021-05-06 02:28:35,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:28:35,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 61 [2021-05-06 02:28:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:35,231 INFO L225 Difference]: With dead ends: 137 [2021-05-06 02:28:35,231 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 02:28:35,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 02:28:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-06 02:28:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 02:28:35,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-06 02:28:35,244 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-06 02:28:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:35,244 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-06 02:28:35,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 02:28:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-06 02:28:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:28:35,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:35,245 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:35,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:28:35,464 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:35,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:35,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2021-05-06 02:28:35,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:35,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905442770] [2021-05-06 02:28:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:35,481 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:35,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884920174] [2021-05-06 02:28:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:35,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:28:35,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:35,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-06 02:28:35,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:35,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905442770] [2021-05-06 02:28:35,694 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:35,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884920174] [2021-05-06 02:28:35,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884920174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:35,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:35,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:35,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441299855] [2021-05-06 02:28:35,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:35,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:35,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:35,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:35,696 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-05-06 02:28:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:35,806 INFO L93 Difference]: Finished difference Result 156 states and 197 transitions. [2021-05-06 02:28:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:35,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 [2021-05-06 02:28:35,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:35,807 INFO L225 Difference]: With dead ends: 156 [2021-05-06 02:28:35,807 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 02:28:35,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:35,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 02:28:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2021-05-06 02:28:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.109375) internal successors, (71), 68 states have internal predecessors, (71), 36 states have call successors, (36), 15 states have call predecessors, (36), 14 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 02:28:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2021-05-06 02:28:35,817 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 69 [2021-05-06 02:28:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:35,817 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2021-05-06 02:28:35,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-05-06 02:28:35,817 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2021-05-06 02:28:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:28:35,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:35,818 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:36,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:36,036 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:36,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1872855628, now seen corresponding path program 2 times [2021-05-06 02:28:36,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:36,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752796751] [2021-05-06 02:28:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:36,056 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:36,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845761015] [2021-05-06 02:28:36,056 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 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 [2021-05-06 02:28:36,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:36,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:36,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:28:36,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:36,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-06 02:28:36,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:36,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752796751] [2021-05-06 02:28:36,309 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:36,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845761015] [2021-05-06 02:28:36,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845761015] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:36,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:36,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:36,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005621965] [2021-05-06 02:28:36,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:36,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:36,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:36,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:36,311 INFO L87 Difference]: Start difference. First operand 115 states and 140 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) [2021-05-06 02:28:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:36,393 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2021-05-06 02:28:36,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:36,394 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 [2021-05-06 02:28:36,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:36,395 INFO L225 Difference]: With dead ends: 133 [2021-05-06 02:28:36,395 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 02:28:36,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:28:36,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 02:28:36,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-06 02:28:36,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 64 states have internal predecessors, (66), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 02:28:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-05-06 02:28:36,405 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 69 [2021-05-06 02:28:36,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:36,405 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-05-06 02:28:36,405 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) [2021-05-06 02:28:36,405 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-05-06 02:28:36,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 02:28:36,405 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:36,406 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:36,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:36,624 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:36,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 2 times [2021-05-06 02:28:36,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:36,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631050775] [2021-05-06 02:28:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:36,631 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:36,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930497084] [2021-05-06 02:28:36,632 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 [2021-05-06 02:28:36,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:36,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:36,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:28:36,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:36,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-05-06 02:28:36,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:36,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631050775] [2021-05-06 02:28:36,844 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:36,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930497084] [2021-05-06 02:28:36,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930497084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:36,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:36,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:36,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093892910] [2021-05-06 02:28:36,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:36,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:36,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:36,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:36,846 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:28:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:36,925 INFO L93 Difference]: Finished difference Result 123 states and 139 transitions. [2021-05-06 02:28:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:36,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-06 02:28:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:36,926 INFO L225 Difference]: With dead ends: 123 [2021-05-06 02:28:36,926 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 02:28:36,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 02:28:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-06 02:28:36,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 02:28:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2021-05-06 02:28:36,933 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 74 [2021-05-06 02:28:36,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:36,933 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2021-05-06 02:28:36,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:28:36,933 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2021-05-06 02:28:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 02:28:36,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:36,933 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2021-05-06 02:28:37,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:28:37,151 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:37,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:37,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2021-05-06 02:28:37,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:37,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792063111] [2021-05-06 02:28:37,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:37,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:37,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769508968] [2021-05-06 02:28:37,158 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 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 [2021-05-06 02:28:37,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:28:37,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:37,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 02:28:37,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:37,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-05-06 02:28:37,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:37,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792063111] [2021-05-06 02:28:37,558 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:37,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769508968] [2021-05-06 02:28:37,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769508968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:37,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:37,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:28:37,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947590338] [2021-05-06 02:28:37,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:28:37,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:37,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:28:37,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:28:37,559 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 02:28:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:37,741 INFO L93 Difference]: Finished difference Result 118 states and 145 transitions. [2021-05-06 02:28:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:28:37,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 79 [2021-05-06 02:28:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:37,743 INFO L225 Difference]: With dead ends: 118 [2021-05-06 02:28:37,743 INFO L226 Difference]: Without dead ends: 112 [2021-05-06 02:28:37,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:28:37,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-06 02:28:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-06 02:28:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 66 states have internal predecessors, (69), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 02:28:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2021-05-06 02:28:37,752 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 79 [2021-05-06 02:28:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:37,752 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2021-05-06 02:28:37,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 02:28:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2021-05-06 02:28:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:28:37,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:37,753 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:37,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:28:37,970 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:37,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:37,971 INFO L82 PathProgramCache]: Analyzing trace with hash -48878079, now seen corresponding path program 3 times [2021-05-06 02:28:37,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:37,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271444528] [2021-05-06 02:28:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:37,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:37,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037230627] [2021-05-06 02:28:37,977 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 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 [2021-05-06 02:28:38,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:28:38,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:38,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:28:38,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:38,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 43 proven. 13 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-05-06 02:28:38,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:38,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271444528] [2021-05-06 02:28:38,212 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:38,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037230627] [2021-05-06 02:28:38,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037230627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:38,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:38,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:38,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866690577] [2021-05-06 02:28:38,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:38,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:38,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:38,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:38,213 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:28:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:38,375 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2021-05-06 02:28:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:38,376 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 87 [2021-05-06 02:28:38,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:38,377 INFO L225 Difference]: With dead ends: 138 [2021-05-06 02:28:38,377 INFO L226 Difference]: Without dead ends: 133 [2021-05-06 02:28:38,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-06 02:28:38,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2021-05-06 02:28:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.1) internal successors, (77), 74 states have internal predecessors, (77), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-06 02:28:38,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 160 transitions. [2021-05-06 02:28:38,387 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 160 transitions. Word has length 87 [2021-05-06 02:28:38,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:38,388 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 160 transitions. [2021-05-06 02:28:38,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:28:38,388 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 160 transitions. [2021-05-06 02:28:38,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:28:38,388 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:38,388 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:38,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:28:38,606 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:38,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:38,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 4 times [2021-05-06 02:28:38,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:38,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929122370] [2021-05-06 02:28:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:38,613 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:38,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188083153] [2021-05-06 02:28:38,613 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 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 [2021-05-06 02:28:38,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:28:38,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:38,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:28:38,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:38,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 66 proven. 24 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-05-06 02:28:38,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:38,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929122370] [2021-05-06 02:28:38,821 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:38,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188083153] [2021-05-06 02:28:38,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188083153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:38,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:38,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:38,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618452733] [2021-05-06 02:28:38,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:38,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:38,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:38,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:38,822 INFO L87 Difference]: Start difference. First operand 129 states and 160 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 6 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) [2021-05-06 02:28:38,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:38,922 INFO L93 Difference]: Finished difference Result 143 states and 171 transitions. [2021-05-06 02:28:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:38,922 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 6 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 92 [2021-05-06 02:28:38,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:38,923 INFO L225 Difference]: With dead ends: 143 [2021-05-06 02:28:38,923 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 02:28:38,924 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:28:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 02:28:38,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-05-06 02:28:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 50 states have internal predecessors, (50), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:28:38,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2021-05-06 02:28:38,929 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 92 [2021-05-06 02:28:38,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:38,929 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2021-05-06 02:28:38,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 6 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) [2021-05-06 02:28:38,930 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2021-05-06 02:28:38,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 02:28:38,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:38,930 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:39,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:39,148 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:39,148 INFO L82 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 4 times [2021-05-06 02:28:39,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:39,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484164529] [2021-05-06 02:28:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:39,154 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:39,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113509179] [2021-05-06 02:28:39,154 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 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 [2021-05-06 02:28:39,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:28:39,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:28:39,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:39,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 164 proven. 6 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-05-06 02:28:39,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:39,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484164529] [2021-05-06 02:28:39,360 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:39,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113509179] [2021-05-06 02:28:39,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113509179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:39,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:39,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:39,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590121013] [2021-05-06 02:28:39,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:39,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:39,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:39,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:39,361 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 02:28:39,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:39,451 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2021-05-06 02:28:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:39,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 97 [2021-05-06 02:28:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:39,452 INFO L225 Difference]: With dead ends: 80 [2021-05-06 02:28:39,452 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:28:39,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:28:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:28:39,453 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) [2021-05-06 02:28:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:28:39,453 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 97 [2021-05-06 02:28:39,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:39,453 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:28:39,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 02:28:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:28:39,453 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:28:39,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:28:39,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:28:40,042 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 33 [2021-05-06 02:28:40,247 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 33 [2021-05-06 02:28:40,376 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 32 [2021-05-06 02:28:41,136 WARN L205 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 35 [2021-05-06 02:28:41,370 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 39 [2021-05-06 02:28:41,617 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 39 [2021-05-06 02:28:41,878 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2021-05-06 02:28:42,107 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 39 [2021-05-06 02:28:42,110 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-06 02:28:42,110 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-06 02:28:42,110 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-06 02:28:42,110 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:28:42,110 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|)) [2021-05-06 02:28:42,110 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:28:42,110 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:28:42,110 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 02:28:42,111 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:28:42,111 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:28:42,111 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-06 02:28:42,111 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-06 02:28:42,111 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:28:42,111 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:28:42,111 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 52) the Hoare annotation is: (let ((.cse1 (<= 1 main_~x~0)) (.cse0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (.cse2 (= main_~b~0 main_~a~0)) (.cse3 (= main_~p~0 1)) (.cse4 (= main_~s~0 1))) (or (and (= main_~b~0 .cse0) (= main_~r~0 0) .cse1 (= (+ main_~q~0 1) 0) (= main_~y~0 (+ main_~x~0 main_~b~0)) .cse2 (<= main_~y~0 2) .cse3 .cse4) (and (= main_~q~0 0) .cse1 (= main_~b~0 main_~y~0) (= main_~a~0 .cse0) (<= main_~x~0 2) .cse2 (<= 1 main_~y~0) .cse3 .cse4))) [2021-05-06 02:28:42,111 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)) [2021-05-06 02:28:42,111 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 59) no Hoare annotation was computed. [2021-05-06 02:28:42,111 INFO L194 CegarLoopUtils]: At program point L56(line 56) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~y~0 2)) (.cse2 (= main_~s~0 1))) (or (and .cse0 (= (+ main_~q~0 1) 0) (= main_~y~0 (+ main_~x~0 main_~b~0)) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (= main_~b~0 main_~a~0) (<= 0 main_~b~0) (not (= main_~b~0 0)) .cse1 .cse2) (and (= main_~q~0 0) .cse0 (= main_~b~0 main_~y~0) (<= main_~x~0 2) (<= 1 main_~y~0) .cse1 .cse2))) [2021-05-06 02:28:42,111 INFO L194 CegarLoopUtils]: At program point L54(line 54) the Hoare annotation is: (let ((.cse1 (<= 1 main_~x~0)) (.cse0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (.cse2 (= main_~b~0 main_~a~0)) (.cse3 (= main_~p~0 1)) (.cse4 (= main_~s~0 1))) (or (and (= main_~b~0 .cse0) (= main_~r~0 0) .cse1 (= (+ main_~q~0 1) 0) (= main_~y~0 (+ main_~x~0 main_~b~0)) .cse2 (<= main_~y~0 2) .cse3 .cse4) (and (= main_~q~0 0) .cse1 (= main_~b~0 main_~y~0) (= main_~a~0 .cse0) (<= main_~x~0 2) .cse2 (<= 1 main_~y~0) .cse3 .cse4))) [2021-05-06 02:28:42,111 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 59) no Hoare annotation was computed. [2021-05-06 02:28:42,111 INFO L198 CegarLoopUtils]: For program point L38(lines 35 52) no Hoare annotation was computed. [2021-05-06 02:28:42,111 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse1 (= main_~q~0 0)) (.cse4 (<= main_~x~0 2)) (.cse5 (<= 1 main_~b~0)) (.cse0 (= main_~r~0 0)) (.cse2 (<= 1 main_~x~0)) (.cse3 (= main_~a~0 main_~x~0)) (.cse6 (= main_~p~0 1)) (.cse7 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 .cse4 .cse5 (<= main_~y~0 2) .cse6 .cse7) (and .cse1 (= main_~x~0 (+ main_~y~0 main_~a~0)) (= (+ main_~r~0 1) 0) .cse4 (< main_~b~0 2) .cse5 (<= 1 main_~y~0) (< 0 main_~a~0) .cse6 .cse7) (and .cse0 (<= (+ main_~a~0 main_~b~0) 2) .cse2 .cse3 (= main_~y~0 (+ main_~x~0 main_~b~0)) .cse6 (= (+ main_~p~0 main_~q~0) 0) .cse7 (< 0 main_~b~0)))) [2021-05-06 02:28:42,111 INFO L194 CegarLoopUtils]: At program point L36-1(line 36) the Hoare annotation is: (let ((.cse1 (= main_~q~0 0)) (.cse4 (<= main_~x~0 2)) (.cse5 (<= 1 main_~b~0)) (.cse0 (= main_~r~0 0)) (.cse2 (<= 1 main_~x~0)) (.cse3 (= main_~a~0 main_~x~0)) (.cse6 (= main_~p~0 1)) (.cse7 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 .cse4 .cse5 (<= main_~y~0 2) .cse6 .cse7) (and .cse1 (= main_~x~0 (+ main_~y~0 main_~a~0)) (= (+ main_~r~0 1) 0) .cse4 (< main_~b~0 2) .cse5 (<= 1 main_~y~0) (< 0 main_~a~0) .cse6 .cse7) (and .cse0 (<= (+ main_~a~0 main_~b~0) 2) .cse2 .cse3 (= main_~y~0 (+ main_~x~0 main_~b~0)) .cse6 (= (+ main_~p~0 main_~q~0) 0) .cse7 (< 0 main_~b~0)))) [2021-05-06 02:28:42,112 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 59) the Hoare annotation is: true [2021-05-06 02:28:42,112 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-06 02:28:42,112 INFO L198 CegarLoopUtils]: For program point L57(line 57) no Hoare annotation was computed. [2021-05-06 02:28:42,112 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2021-05-06 02:28:42,112 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)) [2021-05-06 02:28:42,112 INFO L194 CegarLoopUtils]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~y~0 2)) (.cse2 (= main_~p~0 1)) (.cse3 (= main_~s~0 1))) (or (and (= main_~b~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (= main_~r~0 0) .cse0 (= (+ main_~q~0 1) 0) (= main_~y~0 (+ main_~x~0 main_~b~0)) (= main_~b~0 main_~a~0) .cse1 .cse2 .cse3) (and (= main_~q~0 0) .cse0 (= main_~b~0 main_~y~0) (<= main_~x~0 2) (<= 1 main_~y~0) .cse1 .cse2 .cse3))) [2021-05-06 02:28:42,112 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-06 02:28:42,112 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-06 02:28:42,112 INFO L198 CegarLoopUtils]: For program point L43(lines 43 51) no Hoare annotation was computed. [2021-05-06 02:28:42,112 INFO L194 CegarLoopUtils]: At program point L43-2(lines 35 52) the Hoare annotation is: (let ((.cse1 (= main_~q~0 0)) (.cse4 (<= main_~x~0 2)) (.cse5 (<= 1 main_~b~0)) (.cse0 (= main_~r~0 0)) (.cse2 (<= 1 main_~x~0)) (.cse3 (= main_~a~0 main_~x~0)) (.cse6 (= main_~p~0 1)) (.cse7 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 .cse4 .cse5 (<= main_~y~0 2) .cse6 .cse7) (and .cse1 (= main_~x~0 (+ main_~y~0 main_~a~0)) (= (+ main_~r~0 1) 0) .cse4 (< main_~b~0 2) .cse5 (<= 1 main_~y~0) (< 0 main_~a~0) .cse6 .cse7) (and .cse0 (<= (+ main_~a~0 main_~b~0) 2) .cse2 .cse3 (= main_~y~0 (+ main_~x~0 main_~b~0)) .cse6 (= (+ main_~p~0 main_~q~0) 0) .cse7 (< 0 main_~b~0)))) [2021-05-06 02:28:42,112 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (let ((.cse1 (= main_~q~0 0)) (.cse3 (= main_~b~0 main_~y~0)) (.cse5 (<= main_~x~0 2)) (.cse6 (<= 1 main_~b~0)) (.cse0 (= main_~r~0 0)) (.cse9 (<= (+ main_~a~0 main_~b~0) 2)) (.cse2 (<= 1 main_~x~0)) (.cse4 (= main_~a~0 main_~x~0)) (.cse7 (= main_~p~0 1)) (.cse8 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (<= main_~y~0 2) .cse7 .cse8) (and .cse1 .cse9 .cse2 .cse3 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse5 .cse6 (< 0 main_~a~0) .cse7 .cse8) (and .cse0 .cse9 .cse2 .cse4 (= main_~y~0 (+ main_~x~0 main_~b~0)) .cse7 (= (+ main_~p~0 main_~q~0) 0) .cse8 (< 0 main_~b~0)))) [2021-05-06 02:28:42,112 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-06 02:28:42,112 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-06 02:28:42,112 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-06 02:28:42,112 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:28:42,112 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:28:42,112 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-06 02:28:42,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:28:42 BoogieIcfgContainer [2021-05-06 02:28:42,124 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:28:42,125 INFO L168 Benchmark]: Toolchain (without parser) took 12268.46 ms. Allocated memory was 225.4 MB in the beginning and 412.1 MB in the end (delta: 186.6 MB). Free memory was 190.0 MB in the beginning and 306.5 MB in the end (delta: -116.5 MB). Peak memory consumption was 183.2 MB. Max. memory is 8.0 GB. [2021-05-06 02:28:42,125 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 225.4 MB. Free memory is still 207.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:28:42,125 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.01 ms. Allocated memory is still 225.4 MB. Free memory was 189.8 MB in the beginning and 208.0 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. [2021-05-06 02:28:42,125 INFO L168 Benchmark]: Boogie Preprocessor took 42.98 ms. Allocated memory is still 225.4 MB. Free memory was 208.0 MB in the beginning and 206.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 02:28:42,125 INFO L168 Benchmark]: RCFGBuilder took 269.72 ms. Allocated memory is still 225.4 MB. Free memory was 206.4 MB in the beginning and 189.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:28:42,125 INFO L168 Benchmark]: TraceAbstraction took 11711.67 ms. Allocated memory was 225.4 MB in the beginning and 412.1 MB in the end (delta: 186.6 MB). Free memory was 189.6 MB in the beginning and 306.5 MB in the end (delta: -116.9 MB). Peak memory consumption was 182.5 MB. Max. memory is 8.0 GB. [2021-05-06 02:28:42,125 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 225.4 MB. Free memory is still 207.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 240.01 ms. Allocated memory is still 225.4 MB. Free memory was 189.8 MB in the beginning and 208.0 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.98 ms. Allocated memory is still 225.4 MB. Free memory was 208.0 MB in the beginning and 206.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 269.72 ms. Allocated memory is still 225.4 MB. Free memory was 206.4 MB in the beginning and 189.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11711.67 ms. Allocated memory was 225.4 MB in the beginning and 412.1 MB in the end (delta: 186.6 MB). Free memory was 189.6 MB in the beginning and 306.5 MB in the end (delta: -116.9 MB). Peak memory consumption was 182.5 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, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9219.4ms, OverallIterations: 16, TraceHistogramMax: 12, EmptinessCheckTime: 15.7ms, AutomataDifference: 1768.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 2438.7ms, InitialAbstractionConstructionTime: 8.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 633 SDtfs, 314 SDslu, 2306 SDs, 0 SdLazy, 1484 SolverSat, 308 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 950.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 992 GetRequests, 852 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1000.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=9, InterpolantAutomatonStates: 132, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 160.7ms AutomataMinimizationTime, 16 MinimizatonAttempts, 25 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 106 PreInvPairs, 136 NumberOfFragments, 750 HoareAnnotationTreeSize, 106 FomulaSimplifications, 3571 FormulaSimplificationTreeSizeReduction, 168.9ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 3035 FormulaSimplificationTreeSizeReductionInter, 2257.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 116.0ms SsaConstructionTime, 390.8ms SatisfiabilityAnalysisTime, 2633.7ms InterpolantComputationTime, 985 NumberOfCodeBlocks, 935 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 969 ConstructedInterpolants, 0 QuantifiedInterpolants, 3286 SizeOfPredicates, 55 NumberOfNonLiveVariables, 2821 ConjunctsInSsa, 281 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 1529/1654 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((r == 0 && q == 0) && 1 <= x) && b == y) && a == x) && x <= 2) && 1 <= b) && y <= 2) && p == 1) && s == 1) || (((((((((q == 0 && x == y + a) && r + 1 == 0) && x <= 2) && b < 2) && 1 <= b) && 1 <= y) && 0 < a) && p == 1) && s == 1)) || ((((((((r == 0 && a + b <= 2) && 1 <= x) && a == x) && y == x + b) && p == 1) && p + q == 0) && s == 1) && 0 < b) RESULT: Ultimate proved your program to be correct! Received shutdown request...