/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/mannadiv_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:09:13,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:09:13,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:09:13,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:09:13,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:09:13,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:09:13,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:09:13,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:09:13,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:09:13,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:09:13,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:09:13,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:09:13,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:09:13,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:09:13,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:09:13,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:09:13,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:09:13,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:09:13,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:09:13,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:09:13,138 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 04:09:13,153 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:09:13,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:09:13,154 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:09:13,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:09:13,154 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:09:13,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:09:13,155 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:09:13,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:09:13,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:09:13,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:09:13,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:09:13,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:09:13,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:09:13,155 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:09:13,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:09:13,155 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:09:13,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:09:13,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:09:13,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:09:13,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:09:13,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:09:13,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:09:13,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:09:13,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:09:13,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:09:13,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:09:13,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:09:13,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:09:13,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:09:13,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:09:13,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:09:13,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:09:13,428 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:09:13,429 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:09:13,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound10.c [2021-05-06 04:09:13,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/214f62c08/61b5428b501447f9bd0b594e3d02f968/FLAG64f7b0f76 [2021-05-06 04:09:13,842 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:09:13,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound10.c [2021-05-06 04:09:13,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/214f62c08/61b5428b501447f9bd0b594e3d02f968/FLAG64f7b0f76 [2021-05-06 04:09:13,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/214f62c08/61b5428b501447f9bd0b594e3d02f968 [2021-05-06 04:09:13,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:09:13,864 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:09:13,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:09:13,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:09:13,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:09:13,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:09:13" (1/1) ... [2021-05-06 04:09:13,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ee28a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:13, skipping insertion in model container [2021-05-06 04:09:13,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:09:13" (1/1) ... [2021-05-06 04:09:13,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:09:13,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:09:14,003 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/mannadiv_unwindbound10.c[573,586] [2021-05-06 04:09:14,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:09:14,021 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:09:14,029 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/mannadiv_unwindbound10.c[573,586] [2021-05-06 04:09:14,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:09:14,049 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:09:14,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:14 WrapperNode [2021-05-06 04:09:14,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:09:14,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:09:14,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:09:14,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:09:14,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:14" (1/1) ... [2021-05-06 04:09:14,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:14" (1/1) ... [2021-05-06 04:09:14,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:14" (1/1) ... [2021-05-06 04:09:14,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:14" (1/1) ... [2021-05-06 04:09:14,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:14" (1/1) ... [2021-05-06 04:09:14,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:14" (1/1) ... [2021-05-06 04:09:14,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:14" (1/1) ... [2021-05-06 04:09:14,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:09:14,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:09:14,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:09:14,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:09:14,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:14" (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 04:09:14,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:09:14,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:09:14,162 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:09:14,163 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:09:14,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:09:14,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:09:14,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:09:14,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:09:14,164 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:09:14,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:09:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 04:09:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:09:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:09:14,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:09:14,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:09:14,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:09:14,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:09:14,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:09:14,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:09:14,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:09:14,369 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:09:14,369 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:09:14,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:09:14 BoogieIcfgContainer [2021-05-06 04:09:14,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:09:14,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:09:14,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:09:14,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:09:14,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:09:13" (1/3) ... [2021-05-06 04:09:14,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ff42b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:09:14, skipping insertion in model container [2021-05-06 04:09:14,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:14" (2/3) ... [2021-05-06 04:09:14,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ff42b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:09:14, skipping insertion in model container [2021-05-06 04:09:14,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:09:14" (3/3) ... [2021-05-06 04:09:14,374 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound10.c [2021-05-06 04:09:14,390 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:09:14,393 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:09:14,405 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:09:14,445 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:09:14,445 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:09:14,445 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:09:14,445 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:09:14,445 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:09:14,445 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:09:14,445 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:09:14,445 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:09:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:09:14,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 04:09:14,465 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:14,465 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:14,466 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:14,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:14,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2021-05-06 04:09:14,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:14,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536216253] [2021-05-06 04:09:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:14,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:09:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:14,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:09:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:14,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 04:09:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:14,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:14,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536216253] [2021-05-06 04:09:14,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536216253] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:09:14,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:09:14,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:09:14,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823177797] [2021-05-06 04:09:14,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:09:14,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:14,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:09:14,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:09:14,727 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:09:14,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:14,800 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-05-06 04:09:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:09:14,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 04:09:14,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:14,807 INFO L225 Difference]: With dead ends: 54 [2021-05-06 04:09:14,807 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 04:09:14,809 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:09:14,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 04:09:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 04:09:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:09:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-06 04:09:14,842 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-06 04:09:14,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:14,842 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-06 04:09:14,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:09:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-06 04:09:14,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 04:09:14,844 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:14,844 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:14,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:09:14,844 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:14,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:14,845 INFO L82 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2021-05-06 04:09:14,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:14,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232806832] [2021-05-06 04:09:14,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:14,878 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:14,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684865667] [2021-05-06 04:09:14,879 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 04:09:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:14,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 04:09:14,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:14,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:14,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:14,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:15,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:15,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:15,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:15,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232806832] [2021-05-06 04:09:15,065 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:15,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684865667] [2021-05-06 04:09:15,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684865667] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:09:15,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:09:15,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 04:09:15,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196970753] [2021-05-06 04:09:15,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 04:09:15,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:15,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 04:09:15,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:09:15,067 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:09:15,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:15,076 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-06 04:09:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 04:09:15,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 04:09:15,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:15,077 INFO L225 Difference]: With dead ends: 34 [2021-05-06 04:09:15,077 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 04:09:15,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:09:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 04:09:15,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 04:09:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:09:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 04:09:15,082 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-06 04:09:15,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:15,083 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 04:09:15,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:09:15,083 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 04:09:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 04:09:15,084 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:15,084 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:15,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:09:15,301 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:15,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:15,301 INFO L82 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2021-05-06 04:09:15,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:15,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044091912] [2021-05-06 04:09:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:15,318 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:15,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688529510] [2021-05-06 04:09:15,318 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 04:09:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:15,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 04:09:15,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:15,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:15,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:15,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 04:09:15,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:15,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044091912] [2021-05-06 04:09:15,474 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:15,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688529510] [2021-05-06 04:09:15,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688529510] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:09:15,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:09:15,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 04:09:15,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132237132] [2021-05-06 04:09:15,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:09:15,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:15,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:09:15,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:09:15,476 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 04:09:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:15,534 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-06 04:09:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:09:15,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 04:09:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:15,535 INFO L225 Difference]: With dead ends: 37 [2021-05-06 04:09:15,535 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 04:09:15,536 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:09:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 04:09:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-06 04:09:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:09:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-06 04:09:15,549 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-06 04:09:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:15,549 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-06 04:09:15,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 04:09:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-06 04:09:15,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 04:09:15,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:15,550 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:15,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:15,751 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:15,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:15,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2021-05-06 04:09:15,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:15,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845817129] [2021-05-06 04:09:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:15,765 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:15,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626698297] [2021-05-06 04:09:15,765 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 04:09:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:15,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 04:09:15,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:15,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:15,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:15,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:15,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:15,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845817129] [2021-05-06 04:09:15,886 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:15,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626698297] [2021-05-06 04:09:15,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626698297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:09:15,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:09:15,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:09:15,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78105863] [2021-05-06 04:09:15,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:09:15,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:09:15,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:09:15,887 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 04:09:15,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:15,941 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-06 04:09:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:09:15,941 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 04:09:15,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:15,943 INFO L225 Difference]: With dead ends: 39 [2021-05-06 04:09:15,943 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 04:09:15,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:09:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 04:09:15,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-05-06 04:09:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:09:15,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-06 04:09:15,947 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-06 04:09:15,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:15,947 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-06 04:09:15,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 04:09:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-06 04:09:15,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 04:09:15,948 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:15,948 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:16,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:16,167 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:16,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:16,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2021-05-06 04:09:16,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:16,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241516320] [2021-05-06 04:09:16,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:16,174 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:16,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987095412] [2021-05-06 04:09:16,174 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 04:09:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:16,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:09:16,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:16,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:16,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:16,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241516320] [2021-05-06 04:09:16,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:16,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987095412] [2021-05-06 04:09:16,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987095412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:09:16,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:09:16,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 04:09:16,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966033966] [2021-05-06 04:09:16,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:09:16,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:16,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:09:16,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:09:16,270 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:09:16,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:16,294 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-05-06 04:09:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:09:16,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-06 04:09:16,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:16,295 INFO L225 Difference]: With dead ends: 43 [2021-05-06 04:09:16,295 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 04:09:16,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:09:16,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 04:09:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 04:09:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:09:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 04:09:16,299 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-06 04:09:16,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:16,299 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 04:09:16,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:09:16,299 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 04:09:16,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 04:09:16,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:16,300 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:16,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:16,519 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:16,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:16,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 2 times [2021-05-06 04:09:16,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:16,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738185130] [2021-05-06 04:09:16,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:16,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:16,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593187724] [2021-05-06 04:09:16,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:16,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:09:16,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:09:16,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 04:09:16,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:16,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:16,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:16,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738185130] [2021-05-06 04:09:16,682 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:16,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593187724] [2021-05-06 04:09:16,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593187724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:09:16,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:09:16,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:09:16,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248797596] [2021-05-06 04:09:16,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:09:16,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:16,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:09:16,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:09:16,683 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 04:09:16,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:16,734 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-06 04:09:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:09:16,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-06 04:09:16,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:16,736 INFO L225 Difference]: With dead ends: 52 [2021-05-06 04:09:16,736 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 04:09:16,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:09:16,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 04:09:16,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 04:09:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:09:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-06 04:09:16,746 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-06 04:09:16,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:16,746 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-06 04:09:16,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 04:09:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-06 04:09:16,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 04:09:16,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:16,756 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:16,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 04:09:16,961 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:16,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:16,961 INFO L82 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 3 times [2021-05-06 04:09:16,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:16,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705597399] [2021-05-06 04:09:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:16,968 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:16,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925051157] [2021-05-06 04:09:16,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:17,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:09:17,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:09:17,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:09:17,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:17,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:17,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:17,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705597399] [2021-05-06 04:09:17,184 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:17,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925051157] [2021-05-06 04:09:17,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925051157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:09:17,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:09:17,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:09:17,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695171909] [2021-05-06 04:09:17,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:09:17,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:17,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:09:17,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:09:17,187 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 04:09:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:17,243 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-05-06 04:09:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:09:17,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2021-05-06 04:09:17,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:17,244 INFO L225 Difference]: With dead ends: 61 [2021-05-06 04:09:17,244 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 04:09:17,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:09:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 04:09:17,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 04:09:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:09:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-05-06 04:09:17,249 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2021-05-06 04:09:17,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:17,249 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-05-06 04:09:17,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 04:09:17,250 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-05-06 04:09:17,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 04:09:17,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:17,250 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:17,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:17,462 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:17,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:17,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 4 times [2021-05-06 04:09:17,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:17,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701492518] [2021-05-06 04:09:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:17,476 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:17,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575358253] [2021-05-06 04:09:17,477 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 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 04:09:17,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:09:17,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:09:17,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 04:09:17,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:17,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:17,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:17,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701492518] [2021-05-06 04:09:17,676 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:17,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575358253] [2021-05-06 04:09:17,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575358253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:09:17,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:09:17,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:09:17,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416645564] [2021-05-06 04:09:17,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:09:17,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:17,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:09:17,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:09:17,677 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 04:09:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:17,747 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-05-06 04:09:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 04:09:17,747 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-06 04:09:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:17,748 INFO L225 Difference]: With dead ends: 70 [2021-05-06 04:09:17,748 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 04:09:17,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:09:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 04:09:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 04:09:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:09:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-06 04:09:17,754 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2021-05-06 04:09:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:17,754 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-06 04:09:17,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 04:09:17,754 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-06 04:09:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 04:09:17,755 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:17,755 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:17,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:17,969 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:17,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:17,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 5 times [2021-05-06 04:09:17,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:17,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367911527] [2021-05-06 04:09:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:17,975 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:17,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100726271] [2021-05-06 04:09:17,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:09:18,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 04:09:18,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:09:18,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 04:09:18,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:18,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:18,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:18,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367911527] [2021-05-06 04:09:18,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:18,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100726271] [2021-05-06 04:09:18,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100726271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:09:18,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:09:18,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:09:18,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164963568] [2021-05-06 04:09:18,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:09:18,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:18,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:09:18,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:09:18,270 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 04:09:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:18,348 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-05-06 04:09:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 04:09:18,348 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2021-05-06 04:09:18,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:18,349 INFO L225 Difference]: With dead ends: 79 [2021-05-06 04:09:18,349 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 04:09:18,349 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:09:18,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 04:09:18,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 04:09:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:09:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-05-06 04:09:18,355 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2021-05-06 04:09:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:18,355 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-05-06 04:09:18,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 04:09:18,355 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-05-06 04:09:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 04:09:18,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:18,356 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:18,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 04:09:18,569 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:18,569 INFO L82 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 6 times [2021-05-06 04:09:18,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:18,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33352649] [2021-05-06 04:09:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:18,576 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:18,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079239425] [2021-05-06 04:09:18,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 04:09:18,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 04:09:18,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:09:18,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 04:09:18,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:18,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:18,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:18,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33352649] [2021-05-06 04:09:18,795 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:18,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079239425] [2021-05-06 04:09:18,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079239425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:09:18,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:09:18,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:09:18,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663668505] [2021-05-06 04:09:18,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:09:18,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:18,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:09:18,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:09:18,797 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 04:09:18,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:18,878 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-05-06 04:09:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 04:09:18,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2021-05-06 04:09:18,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:18,879 INFO L225 Difference]: With dead ends: 88 [2021-05-06 04:09:18,879 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 04:09:18,879 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:09:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 04:09:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-06 04:09:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:09:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-05-06 04:09:18,885 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2021-05-06 04:09:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:18,885 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-05-06 04:09:18,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 04:09:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-05-06 04:09:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 04:09:18,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:18,886 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:19,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:19,103 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:19,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 7 times [2021-05-06 04:09:19,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:19,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611983413] [2021-05-06 04:09:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:19,109 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:19,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239654404] [2021-05-06 04:09:19,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 04:09:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:19,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 04:09:19,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:19,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:19,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:19,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611983413] [2021-05-06 04:09:19,321 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:19,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239654404] [2021-05-06 04:09:19,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239654404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:09:19,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:09:19,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:09:19,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794957374] [2021-05-06 04:09:19,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:09:19,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:19,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:09:19,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:09:19,322 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 04:09:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:19,420 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2021-05-06 04:09:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 04:09:19,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2021-05-06 04:09:19,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:19,421 INFO L225 Difference]: With dead ends: 97 [2021-05-06 04:09:19,421 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 04:09:19,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:09:19,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 04:09:19,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-06 04:09:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:09:19,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-06 04:09:19,427 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2021-05-06 04:09:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:19,427 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-06 04:09:19,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 04:09:19,427 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-06 04:09:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 04:09:19,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:19,428 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:19,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:19,637 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:19,637 INFO L82 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 8 times [2021-05-06 04:09:19,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:19,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885029169] [2021-05-06 04:09:19,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:19,643 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:19,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117240103] [2021-05-06 04:09:19,643 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 04:09:19,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:09:19,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:09:19,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 04:09:19,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:19,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:19,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:19,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885029169] [2021-05-06 04:09:19,888 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:19,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117240103] [2021-05-06 04:09:19,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117240103] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:09:19,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:09:19,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 04:09:19,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649161467] [2021-05-06 04:09:19,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 04:09:19,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:19,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 04:09:19,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:09:19,889 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 04:09:20,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:20,005 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2021-05-06 04:09:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 04:09:20,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2021-05-06 04:09:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:20,011 INFO L225 Difference]: With dead ends: 106 [2021-05-06 04:09:20,012 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 04:09:20,012 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:09:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 04:09:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 04:09:20,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:09:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-05-06 04:09:20,027 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2021-05-06 04:09:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:20,027 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-05-06 04:09:20,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 04:09:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-05-06 04:09:20,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 04:09:20,028 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:20,028 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:20,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 04:09:20,237 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:20,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 9 times [2021-05-06 04:09:20,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:20,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067190598] [2021-05-06 04:09:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:20,247 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:20,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340280458] [2021-05-06 04:09:20,247 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 04:09:20,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 04:09:20,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:09:20,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 04:09:20,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:20,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:20,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:20,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067190598] [2021-05-06 04:09:20,509 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:20,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340280458] [2021-05-06 04:09:20,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340280458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:09:20,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:09:20,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 04:09:20,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901917458] [2021-05-06 04:09:20,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 04:09:20,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:20,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 04:09:20,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:09:20,510 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 04:09:20,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:20,659 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2021-05-06 04:09:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 04:09:20,659 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2021-05-06 04:09:20,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:20,660 INFO L225 Difference]: With dead ends: 115 [2021-05-06 04:09:20,660 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 04:09:20,660 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:09:20,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 04:09:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-06 04:09:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:09:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-05-06 04:09:20,665 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2021-05-06 04:09:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:20,665 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-05-06 04:09:20,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 04:09:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-05-06 04:09:20,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 04:09:20,665 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:20,665 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:20,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 04:09:20,881 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:20,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:20,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 10 times [2021-05-06 04:09:20,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:20,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291636565] [2021-05-06 04:09:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:20,886 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:20,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129497396] [2021-05-06 04:09:20,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:20,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:09:20,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 04:09:20,955 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 04:09:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 04:09:20,982 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 04:09:21,095 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 04:09:21,095 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 04:09:21,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 04:09:21,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 04:09:21 BoogieIcfgContainer [2021-05-06 04:09:21,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 04:09:21,343 INFO L168 Benchmark]: Toolchain (without parser) took 7478.97 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 167.5 MB in the beginning and 175.9 MB in the end (delta: -8.5 MB). Peak memory consumption was 33.3 MB. Max. memory is 8.0 GB. [2021-05-06 04:09:21,343 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 204.5 MB. Free memory is still 184.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 04:09:21,343 INFO L168 Benchmark]: CACSL2BoogieTranslator took 183.16 ms. Allocated memory is still 204.5 MB. Free memory was 167.3 MB in the beginning and 157.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 04:09:21,343 INFO L168 Benchmark]: Boogie Preprocessor took 45.64 ms. Allocated memory is still 204.5 MB. Free memory was 157.5 MB in the beginning and 186.4 MB in the end (delta: -28.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-06 04:09:21,343 INFO L168 Benchmark]: RCFGBuilder took 272.08 ms. Allocated memory is still 204.5 MB. Free memory was 186.4 MB in the beginning and 171.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 04:09:21,343 INFO L168 Benchmark]: TraceAbstraction took 6971.79 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 170.7 MB in the beginning and 175.9 MB in the end (delta: -5.2 MB). Peak memory consumption was 37.2 MB. Max. memory is 8.0 GB. [2021-05-06 04:09:21,344 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 204.5 MB. Free memory is still 184.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 183.16 ms. Allocated memory is still 204.5 MB. Free memory was 167.3 MB in the beginning and 157.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.64 ms. Allocated memory is still 204.5 MB. Free memory was 157.5 MB in the beginning and 186.4 MB in the end (delta: -28.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 272.08 ms. Allocated memory is still 204.5 MB. Free memory was 186.4 MB in the beginning and 171.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6971.79 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 170.7 MB in the beginning and 175.9 MB in the end (delta: -5.2 MB). Peak memory consumption was 37.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=20, counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L29] RET assume_abort_if_not(x1 >= 0) VAL [\old(counter)=0, counter=0, x1=11, x2=1] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L30] RET assume_abort_if_not(x2 != 0) VAL [\old(counter)=0, counter=0, x1=11, x2=1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [\old(counter)=0, counter=0, x1=11, x2=1, y1=0, y2=0, y3=11] [L36] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, x1=11, x2=1, y1=0, y2=0, y3=11] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=1, x1=11, x2=1, y1=0, y2=0, y3=11] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=1, x1=11, x2=1, y1=0, y2=0, y3=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=1, x1=11, x2=1, y1=1, y2=0, y3=10] [L36] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, x1=11, x2=1, y1=1, y2=0, y3=10] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=2, x1=11, x2=1, y1=1, y2=0, y3=10] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=2, x1=11, x2=1, y1=1, y2=0, y3=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=2, x1=11, x2=1, y1=2, y2=0, y3=9] [L36] EXPR counter++ VAL [\old(counter)=0, counter=3, counter++=2, x1=11, x2=1, y1=2, y2=0, y3=9] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=3, x1=11, x2=1, y1=2, y2=0, y3=9] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=3, x1=11, x2=1, y1=2, y2=0, y3=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=3, x1=11, x2=1, y1=3, y2=0, y3=8] [L36] EXPR counter++ VAL [\old(counter)=0, counter=4, counter++=3, x1=11, x2=1, y1=3, y2=0, y3=8] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=4, x1=11, x2=1, y1=3, y2=0, y3=8] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=4, x1=11, x2=1, y1=3, y2=0, y3=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=4, x1=11, x2=1, y1=4, y2=0, y3=7] [L36] EXPR counter++ VAL [\old(counter)=0, counter=5, counter++=4, x1=11, x2=1, y1=4, y2=0, y3=7] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=5, x1=11, x2=1, y1=4, y2=0, y3=7] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=5, x1=11, x2=1, y1=4, y2=0, y3=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=5, x1=11, x2=1, y1=5, y2=0, y3=6] [L36] EXPR counter++ VAL [\old(counter)=0, counter=6, counter++=5, x1=11, x2=1, y1=5, y2=0, y3=6] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=6, x1=11, x2=1, y1=5, y2=0, y3=6] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=6, x1=11, x2=1, y1=5, y2=0, y3=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=6, x1=11, x2=1, y1=6, y2=0, y3=5] [L36] EXPR counter++ VAL [\old(counter)=0, counter=7, counter++=6, x1=11, x2=1, y1=6, y2=0, y3=5] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=7, x1=11, x2=1, y1=6, y2=0, y3=5] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=7, x1=11, x2=1, y1=6, y2=0, y3=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=7, x1=11, x2=1, y1=7, y2=0, y3=4] [L36] EXPR counter++ VAL [\old(counter)=0, counter=8, counter++=7, x1=11, x2=1, y1=7, y2=0, y3=4] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=8, x1=11, x2=1, y1=7, y2=0, y3=4] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=8, x1=11, x2=1, y1=7, y2=0, y3=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=8, x1=11, x2=1, y1=8, y2=0, y3=3] [L36] EXPR counter++ VAL [\old(counter)=0, counter=9, counter++=8, x1=11, x2=1, y1=8, y2=0, y3=3] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=9, x1=11, x2=1, y1=8, y2=0, y3=3] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=9, x1=11, x2=1, y1=8, y2=0, y3=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=9, x1=11, x2=1, y1=9, y2=0, y3=2] [L36] EXPR counter++ VAL [\old(counter)=0, counter=10, counter++=9, x1=11, x2=1, y1=9, y2=0, y3=2] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=10, x1=11, x2=1, y1=9, y2=0, y3=2] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=10, x1=11, x2=1, y1=9, y2=0, y3=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=10, x1=11, x2=1, y1=10, y2=0, y3=1] [L36] EXPR counter++ VAL [\old(counter)=0, counter=11, counter++=10, x1=11, x2=1, y1=10, y2=0, y3=1] [L36] COND FALSE !(counter++<10) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L18] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6853.0ms, OverallIterations: 14, TraceHistogramMax: 11, EmptinessCheckTime: 24.9ms, AutomataDifference: 965.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 377 SDtfs, 264 SDslu, 960 SDs, 0 SdLazy, 420 SolverSat, 159 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 356.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 735 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 630.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=13, InterpolantAutomatonStates: 149, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 105.0ms AutomataMinimizationTime, 13 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 139.2ms SsaConstructionTime, 418.2ms SatisfiabilityAnalysisTime, 1717.9ms InterpolantComputationTime, 822 NumberOfCodeBlocks, 822 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 696 ConstructedInterpolants, 0 QuantifiedInterpolants, 1958 SizeOfPredicates, 60 NumberOfNonLiveVariables, 2570 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 143/1314 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...