/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:31:48,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:31:48,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:31:48,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:31:48,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:31:48,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:31:48,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:31:48,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:31:48,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:31:48,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:31:48,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:31:48,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:31:48,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:31:48,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:31:48,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:31:48,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:31:48,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:31:48,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:31:48,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:31:48,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:31:48,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:31:48,897 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:31:48,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:31:48,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:31:48,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:31:48,901 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:31:48,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:31:48,901 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:31:48,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:31:48,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:31:48,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:31:48,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:31:48,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:31:48,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:31:48,903 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:31:48,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:31:48,903 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:31:48,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:31:48,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:31:48,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:31:48,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:31:48,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:31:48,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:31:48,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:31:48,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:31:48,904 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:31:48,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:31:48,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:31:48,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:31:48,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:31:49,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:31:49,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:31:49,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:31:49,186 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:31:49,187 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:31:49,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2021-05-06 02:31:49,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b65298e8/567f47a6fc91498f8dad10bf73b8256e/FLAGc002c48ed [2021-05-06 02:31:49,644 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:31:49,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2021-05-06 02:31:49,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b65298e8/567f47a6fc91498f8dad10bf73b8256e/FLAGc002c48ed [2021-05-06 02:31:49,673 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b65298e8/567f47a6fc91498f8dad10bf73b8256e [2021-05-06 02:31:49,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:31:49,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:31:49,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:31:49,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:31:49,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:31:49,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:31:49" (1/1) ... [2021-05-06 02:31:49,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f16ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:49, skipping insertion in model container [2021-05-06 02:31:49,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:31:49" (1/1) ... [2021-05-06 02:31:49,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:31:49,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:31:49,816 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2021-05-06 02:31:49,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:31:49,839 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:31:49,849 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2021-05-06 02:31:49,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:31:49,882 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:31:49,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:49 WrapperNode [2021-05-06 02:31:49,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:31:49,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:31:49,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:31:49,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:31:49,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:49" (1/1) ... [2021-05-06 02:31:49,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:49" (1/1) ... [2021-05-06 02:31:49,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:49" (1/1) ... [2021-05-06 02:31:49,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:49" (1/1) ... [2021-05-06 02:31:49,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:49" (1/1) ... [2021-05-06 02:31:49,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:49" (1/1) ... [2021-05-06 02:31:49,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:49" (1/1) ... [2021-05-06 02:31:49,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:31:49,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:31:49,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:31:49,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:31:49,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:31:50,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:31:50,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:31:50,030 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:31:50,030 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:31:50,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:31:50,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:31:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:31:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:31:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:31:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:31:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:31:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:31:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:31:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:31:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:31:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:31:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:31:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:31:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:31:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:31:50,353 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:31:50,353 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 02:31:50,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:31:50 BoogieIcfgContainer [2021-05-06 02:31:50,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:31:50,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:31:50,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:31:50,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:31:50,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:31:49" (1/3) ... [2021-05-06 02:31:50,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a517381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:31:50, skipping insertion in model container [2021-05-06 02:31:50,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:31:49" (2/3) ... [2021-05-06 02:31:50,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a517381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:31:50, skipping insertion in model container [2021-05-06 02:31:50,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:31:50" (3/3) ... [2021-05-06 02:31:50,360 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound50.c [2021-05-06 02:31:50,366 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:31:50,369 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:31:50,381 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:31:50,410 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:31:50,410 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:31:50,410 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:31:50,410 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:31:50,410 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:31:50,410 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:31:50,411 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:31:50,411 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:31:50,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 02:31:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 02:31:50,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:50,435 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:50,435 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:50,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:50,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2021-05-06 02:31:50,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:50,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162836150] [2021-05-06 02:31:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:50,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:31:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:50,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:31:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:50,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:31:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:50,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:31:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:50,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:31:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:31:50,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:50,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162836150] [2021-05-06 02:31:50,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162836150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:31:50,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:31:50,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:31:50,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377073579] [2021-05-06 02:31:50,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:31:50,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:50,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:31:50,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:31:50,719 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:31:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:50,866 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2021-05-06 02:31:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:31:50,868 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-06 02:31:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:50,875 INFO L225 Difference]: With dead ends: 72 [2021-05-06 02:31:50,875 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:31:50,879 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:31:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:31:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-06 02:31:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 02:31:50,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-06 02:31:50,937 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-06 02:31:50,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:50,937 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-06 02:31:50,938 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:31:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-06 02:31:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:31:50,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:50,939 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:50,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:31:50,940 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:50,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:50,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2021-05-06 02:31:50,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:50,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434238597] [2021-05-06 02:31:50,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:50,979 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:50,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290101588] [2021-05-06 02:31:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:51,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:31:51,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:51,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:51,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:51,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:51,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:51,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:31:51,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:51,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434238597] [2021-05-06 02:31:51,286 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:51,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290101588] [2021-05-06 02:31:51,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290101588] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:31:51,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:31:51,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:31:51,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075863369] [2021-05-06 02:31:51,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:31:51,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:51,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:31:51,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:31:51,293 INFO L87 Difference]: Start difference. First operand 34 states and 45 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:31:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:51,319 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-05-06 02:31:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:31:51,320 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:31:51,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:51,323 INFO L225 Difference]: With dead ends: 44 [2021-05-06 02:31:51,323 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 02:31:51,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:31:51,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 02:31:51,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 02:31:51,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 02:31:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-06 02:31:51,338 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-06 02:31:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:51,343 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-06 02:31:51,343 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:31:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-06 02:31:51,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 02:31:51,344 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:51,344 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:51,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:31:51,553 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:51,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2021-05-06 02:31:51,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:51,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107603853] [2021-05-06 02:31:51,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:51,568 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:51,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827865648] [2021-05-06 02:31:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:51,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:31:51,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:51,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:51,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:51,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:51,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:51,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:31:51,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:51,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107603853] [2021-05-06 02:31:51,790 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:51,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827865648] [2021-05-06 02:31:51,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827865648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:51,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:51,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:31:51,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738288437] [2021-05-06 02:31:51,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:31:51,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:51,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:31:51,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:31:51,792 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:31:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:51,879 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2021-05-06 02:31:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:31:51,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 02:31:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:51,881 INFO L225 Difference]: With dead ends: 53 [2021-05-06 02:31:51,881 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 02:31:51,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:51,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 02:31:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-06 02:31:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 02:31:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 02:31:51,889 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-06 02:31:51,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:51,889 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 02:31:51,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:31:51,890 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 02:31:51,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 02:31:51,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:51,891 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:52,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:52,114 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:52,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:52,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2021-05-06 02:31:52,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:52,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821792360] [2021-05-06 02:31:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:52,125 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:52,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948170820] [2021-05-06 02:31:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:52,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:31:52,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:52,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:31:52,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:52,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821792360] [2021-05-06 02:31:52,388 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:52,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948170820] [2021-05-06 02:31:52,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948170820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:52,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:52,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:31:52,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552125238] [2021-05-06 02:31:52,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:31:52,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:52,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:31:52,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:52,390 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:31:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:52,542 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2021-05-06 02:31:52,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:31:52,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 02:31:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:52,544 INFO L225 Difference]: With dead ends: 59 [2021-05-06 02:31:52,544 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 02:31:52,544 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:31:52,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 02:31:52,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-05-06 02:31:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:31:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-05-06 02:31:52,557 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2021-05-06 02:31:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:52,558 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-05-06 02:31:52,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:31:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-05-06 02:31:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:31:52,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:52,563 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:52,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:52,785 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:52,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:52,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2021-05-06 02:31:52,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:52,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561878976] [2021-05-06 02:31:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:52,800 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:52,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226157502] [2021-05-06 02:31:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:52,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:31:52,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:52,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:31:52,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:52,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561878976] [2021-05-06 02:31:52,951 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:52,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226157502] [2021-05-06 02:31:52,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226157502] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:31:52,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:31:52,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:31:52,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493032768] [2021-05-06 02:31:52,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:31:52,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:52,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:31:52,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:31:52,953 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:31:52,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:52,983 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-05-06 02:31:52,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:31:52,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 02:31:52,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:52,985 INFO L225 Difference]: With dead ends: 63 [2021-05-06 02:31:52,985 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 02:31:52,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:31:52,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 02:31:52,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 02:31:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:31:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-05-06 02:31:52,992 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 39 [2021-05-06 02:31:52,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:52,992 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-05-06 02:31:52,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:31:52,993 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-05-06 02:31:52,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 02:31:52,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:52,993 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:53,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:53,209 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:53,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:53,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2021-05-06 02:31:53,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:53,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780805245] [2021-05-06 02:31:53,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:53,234 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:53,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963831126] [2021-05-06 02:31:53,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:53,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:31:53,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:53,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:31:53,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:53,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780805245] [2021-05-06 02:31:53,478 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:53,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963831126] [2021-05-06 02:31:53,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963831126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:53,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:53,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:31:53,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402483561] [2021-05-06 02:31:53,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:31:53,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:53,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:31:53,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:53,481 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:31:53,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:53,579 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-05-06 02:31:53,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:31:53,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-06 02:31:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:53,581 INFO L225 Difference]: With dead ends: 58 [2021-05-06 02:31:53,581 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 02:31:53,581 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:31:53,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 02:31:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 02:31:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:31:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-05-06 02:31:53,589 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-05-06 02:31:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:53,589 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-05-06 02:31:53,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:31:53,590 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-05-06 02:31:53,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 02:31:53,590 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:53,590 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:53,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:31:53,814 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:53,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:53,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2021-05-06 02:31:53,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:53,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081948593] [2021-05-06 02:31:53,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:53,824 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:53,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398299982] [2021-05-06 02:31:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:53,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:31:53,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:53,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:53,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:31:54,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:54,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081948593] [2021-05-06 02:31:54,060 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:54,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398299982] [2021-05-06 02:31:54,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398299982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:54,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:54,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:31:54,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384758084] [2021-05-06 02:31:54,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:31:54,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:54,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:31:54,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:54,061 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:31:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:54,172 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2021-05-06 02:31:54,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:31:54,172 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 02:31:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:54,173 INFO L225 Difference]: With dead ends: 62 [2021-05-06 02:31:54,173 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 02:31:54,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:31:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 02:31:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 02:31:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:31:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-05-06 02:31:54,192 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 46 [2021-05-06 02:31:54,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:54,192 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-05-06 02:31:54,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:31:54,192 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-05-06 02:31:54,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 02:31:54,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:54,193 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:54,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:54,414 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:54,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:54,415 INFO L82 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2021-05-06 02:31:54,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:54,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849861077] [2021-05-06 02:31:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:54,424 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:54,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881320236] [2021-05-06 02:31:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:54,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:31:54,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:54,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-06 02:31:54,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:54,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849861077] [2021-05-06 02:31:54,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:54,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881320236] [2021-05-06 02:31:54,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881320236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:54,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:54,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:31:54,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621172551] [2021-05-06 02:31:54,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:31:54,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:54,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:31:54,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:31:54,709 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:31:54,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:54,887 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-05-06 02:31:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:31:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-06 02:31:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:54,889 INFO L225 Difference]: With dead ends: 66 [2021-05-06 02:31:54,889 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 02:31:54,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:31:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 02:31:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-06 02:31:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:31:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-05-06 02:31:54,897 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 51 [2021-05-06 02:31:54,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:54,897 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-05-06 02:31:54,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:31:54,898 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-05-06 02:31:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 02:31:54,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:54,898 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:55,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:55,122 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:55,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 1 times [2021-05-06 02:31:55,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:55,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997093106] [2021-05-06 02:31:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:55,132 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:55,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547233893] [2021-05-06 02:31:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:55,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:31:55,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:55,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:31:55,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:55,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997093106] [2021-05-06 02:31:55,371 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:55,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547233893] [2021-05-06 02:31:55,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547233893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:55,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:55,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:31:55,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735857752] [2021-05-06 02:31:55,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:31:55,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:55,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:31:55,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:31:55,372 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:31:55,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:55,455 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2021-05-06 02:31:55,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:31:55,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2021-05-06 02:31:55,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:55,457 INFO L225 Difference]: With dead ends: 96 [2021-05-06 02:31:55,458 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 02:31:55,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:55,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 02:31:55,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-05-06 02:31:55,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 02:31:55,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2021-05-06 02:31:55,469 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2021-05-06 02:31:55,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:55,470 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2021-05-06 02:31:55,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:31:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2021-05-06 02:31:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 02:31:55,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:55,471 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:55,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:31:55,694 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:55,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:55,695 INFO L82 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2021-05-06 02:31:55,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:55,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29861045] [2021-05-06 02:31:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:55,703 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:55,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056404686] [2021-05-06 02:31:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:55,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:31:55,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:55,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:55,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:55,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:55,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:55,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:55,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:55,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:55,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:55,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:55,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:55,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:31:55,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:55,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29861045] [2021-05-06 02:31:55,890 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:55,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056404686] [2021-05-06 02:31:55,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056404686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:55,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:55,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:31:55,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642551927] [2021-05-06 02:31:55,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:31:55,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:55,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:31:55,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:31:55,892 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:55,954 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2021-05-06 02:31:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:31:55,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2021-05-06 02:31:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:55,956 INFO L225 Difference]: With dead ends: 107 [2021-05-06 02:31:55,956 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 02:31:55,956 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 02:31:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 02:31:55,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 02:31:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-06 02:31:55,967 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 60 [2021-05-06 02:31:55,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:55,967 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-06 02:31:55,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:55,967 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-06 02:31:55,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:31:55,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:55,968 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:56,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:56,181 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:56,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:56,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2021-05-06 02:31:56,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:56,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059069056] [2021-05-06 02:31:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:56,189 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:56,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636522403] [2021-05-06 02:31:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order 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 02:31:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:56,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:31:56,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:56,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 02:31:56,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:56,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059069056] [2021-05-06 02:31:56,481 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:56,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636522403] [2021-05-06 02:31:56,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636522403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:56,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:56,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:31:56,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477412853] [2021-05-06 02:31:56,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:31:56,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:56,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:31:56,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:56,482 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:31:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:56,685 INFO L93 Difference]: Finished difference Result 178 states and 253 transitions. [2021-05-06 02:31:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:31:56,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-06 02:31:56,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:56,688 INFO L225 Difference]: With dead ends: 178 [2021-05-06 02:31:56,688 INFO L226 Difference]: Without dead ends: 170 [2021-05-06 02:31:56,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:31:56,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-06 02:31:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2021-05-06 02:31:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 91 states have internal predecessors, (112), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 02:31:56,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2021-05-06 02:31:56,712 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 61 [2021-05-06 02:31:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:56,713 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2021-05-06 02:31:56,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:31:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2021-05-06 02:31:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 02:31:56,714 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:56,714 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:56,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:56,917 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:56,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:56,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 1 times [2021-05-06 02:31:56,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:56,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433070302] [2021-05-06 02:31:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:56,926 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:56,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453045347] [2021-05-06 02:31:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:56,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:31:56,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:57,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:31:57,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:57,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433070302] [2021-05-06 02:31:57,120 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:57,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453045347] [2021-05-06 02:31:57,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453045347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:57,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:57,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:31:57,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830399865] [2021-05-06 02:31:57,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:31:57,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:57,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:31:57,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:31:57,121 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:57,181 INFO L93 Difference]: Finished difference Result 175 states and 244 transitions. [2021-05-06 02:31:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:31:57,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-06 02:31:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:57,186 INFO L225 Difference]: With dead ends: 175 [2021-05-06 02:31:57,186 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 02:31:57,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:57,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 02:31:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-06 02:31:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 91 states have internal predecessors, (111), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 02:31:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2021-05-06 02:31:57,202 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 62 [2021-05-06 02:31:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:57,202 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2021-05-06 02:31:57,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2021-05-06 02:31:57,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 02:31:57,203 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:57,203 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:57,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:31:57,425 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:57,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:57,426 INFO L82 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 1 times [2021-05-06 02:31:57,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:57,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414624961] [2021-05-06 02:31:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:57,433 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:57,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69776078] [2021-05-06 02:31:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:57,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:31:57,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:57,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:31:57,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:57,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414624961] [2021-05-06 02:31:57,617 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:57,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69776078] [2021-05-06 02:31:57,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69776078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:57,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:57,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:31:57,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132158738] [2021-05-06 02:31:57,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:31:57,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:57,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:31:57,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:57,618 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:57,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:57,701 INFO L93 Difference]: Finished difference Result 245 states and 345 transitions. [2021-05-06 02:31:57,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:31:57,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-06 02:31:57,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:57,703 INFO L225 Difference]: With dead ends: 245 [2021-05-06 02:31:57,703 INFO L226 Difference]: Without dead ends: 169 [2021-05-06 02:31:57,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:57,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-06 02:31:57,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-05-06 02:31:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 108 states have internal predecessors, (130), 46 states have call successors, (46), 16 states have call predecessors, (46), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:31:57,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2021-05-06 02:31:57,716 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 66 [2021-05-06 02:31:57,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:57,717 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2021-05-06 02:31:57,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:57,717 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2021-05-06 02:31:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 02:31:57,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:57,718 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:57,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:31:57,937 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:57,937 INFO L82 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2021-05-06 02:31:57,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:57,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56150532] [2021-05-06 02:31:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:57,944 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:57,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490283560] [2021-05-06 02:31:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:58,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 02:31:58,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:58,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:31:58,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:58,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56150532] [2021-05-06 02:31:58,161 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:58,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490283560] [2021-05-06 02:31:58,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490283560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:58,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:58,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:31:58,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709072343] [2021-05-06 02:31:58,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:31:58,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:58,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:31:58,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:58,162 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 02:31:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:58,319 INFO L93 Difference]: Finished difference Result 214 states and 296 transitions. [2021-05-06 02:31:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:31:58,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 68 [2021-05-06 02:31:58,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:58,321 INFO L225 Difference]: With dead ends: 214 [2021-05-06 02:31:58,321 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 02:31:58,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:31:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 02:31:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2021-05-06 02:31:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.2857142857142858) internal successors, (162), 132 states have internal predecessors, (162), 65 states have call successors, (65), 17 states have call predecessors, (65), 16 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:31:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 289 transitions. [2021-05-06 02:31:58,349 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 289 transitions. Word has length 68 [2021-05-06 02:31:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:58,349 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 289 transitions. [2021-05-06 02:31:58,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 02:31:58,349 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 289 transitions. [2021-05-06 02:31:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 02:31:58,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:58,350 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:58,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:31:58,565 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:58,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:58,565 INFO L82 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 2 times [2021-05-06 02:31:58,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:58,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566389673] [2021-05-06 02:31:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:58,572 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:58,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360425936] [2021-05-06 02:31:58,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:58,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:58,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:58,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:31:58,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:58,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-06 02:31:58,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:58,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566389673] [2021-05-06 02:31:58,891 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:58,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360425936] [2021-05-06 02:31:58,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360425936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:58,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:58,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:31:58,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118373081] [2021-05-06 02:31:58,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:31:58,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:58,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:31:58,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:31:58,893 INFO L87 Difference]: Start difference. First operand 208 states and 289 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 02:31:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:59,171 INFO L93 Difference]: Finished difference Result 216 states and 296 transitions. [2021-05-06 02:31:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:31:59,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2021-05-06 02:31:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:59,173 INFO L225 Difference]: With dead ends: 216 [2021-05-06 02:31:59,173 INFO L226 Difference]: Without dead ends: 214 [2021-05-06 02:31:59,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:31:59,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-06 02:31:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2021-05-06 02:31:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 129 states have (on average 1.2790697674418605) internal successors, (165), 135 states have internal predecessors, (165), 65 states have call successors, (65), 18 states have call predecessors, (65), 17 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:31:59,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 292 transitions. [2021-05-06 02:31:59,190 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 292 transitions. Word has length 73 [2021-05-06 02:31:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:59,190 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 292 transitions. [2021-05-06 02:31:59,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 02:31:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 292 transitions. [2021-05-06 02:31:59,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 02:31:59,191 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:59,191 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:59,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:59,405 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:59,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 3 times [2021-05-06 02:31:59,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:59,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450129939] [2021-05-06 02:31:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:59,412 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:59,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038600051] [2021-05-06 02:31:59,412 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:59,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:31:59,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:59,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 02:31:59,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:59,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-06 02:31:59,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:59,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450129939] [2021-05-06 02:31:59,903 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:59,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038600051] [2021-05-06 02:31:59,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038600051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:59,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:59,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:31:59,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977611591] [2021-05-06 02:31:59,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:31:59,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:59,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:31:59,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:31:59,905 INFO L87 Difference]: Start difference. First operand 212 states and 292 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:32:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:00,332 INFO L93 Difference]: Finished difference Result 224 states and 302 transitions. [2021-05-06 02:32:00,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:32:00,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2021-05-06 02:32:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:00,335 INFO L225 Difference]: With dead ends: 224 [2021-05-06 02:32:00,335 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 02:32:00,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:32:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 02:32:00,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2021-05-06 02:32:00,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 135 states have (on average 1.2666666666666666) internal successors, (171), 141 states have internal predecessors, (171), 65 states have call successors, (65), 20 states have call predecessors, (65), 19 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:32:00,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 298 transitions. [2021-05-06 02:32:00,354 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 298 transitions. Word has length 78 [2021-05-06 02:32:00,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:00,355 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 298 transitions. [2021-05-06 02:32:00,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:32:00,355 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 298 transitions. [2021-05-06 02:32:00,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 02:32:00,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:00,356 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:00,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:32:00,579 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:00,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:00,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 2 times [2021-05-06 02:32:00,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:00,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341830748] [2021-05-06 02:32:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:00,587 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:00,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005116283] [2021-05-06 02:32:00,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:00,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:32:00,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:00,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 02:32:00,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:00,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-05-06 02:32:00,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:00,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341830748] [2021-05-06 02:32:00,864 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:00,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005116283] [2021-05-06 02:32:00,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005116283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:00,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:00,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:32:00,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003416183] [2021-05-06 02:32:00,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:32:00,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:00,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:32:00,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:32:00,866 INFO L87 Difference]: Start difference. First operand 220 states and 298 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:32:01,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:01,058 INFO L93 Difference]: Finished difference Result 285 states and 407 transitions. [2021-05-06 02:32:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:32:01,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2021-05-06 02:32:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:01,060 INFO L225 Difference]: With dead ends: 285 [2021-05-06 02:32:01,060 INFO L226 Difference]: Without dead ends: 283 [2021-05-06 02:32:01,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:32:01,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-06 02:32:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 253. [2021-05-06 02:32:01,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 150 states have (on average 1.2933333333333332) internal successors, (194), 157 states have internal predecessors, (194), 82 states have call successors, (82), 21 states have call predecessors, (82), 20 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-06 02:32:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 355 transitions. [2021-05-06 02:32:01,082 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 355 transitions. Word has length 82 [2021-05-06 02:32:01,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:01,084 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 355 transitions. [2021-05-06 02:32:01,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:32:01,084 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 355 transitions. [2021-05-06 02:32:01,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 02:32:01,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:01,085 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:01,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:01,299 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 1 times [2021-05-06 02:32:01,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:01,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838333646] [2021-05-06 02:32:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:01,312 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:01,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679615486] [2021-05-06 02:32:01,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:32:01,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:01,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 02:32:01,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:01,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838333646] [2021-05-06 02:32:01,575 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:01,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679615486] [2021-05-06 02:32:01,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679615486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:01,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:01,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:32:01,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214705032] [2021-05-06 02:32:01,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:32:01,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:01,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:32:01,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:32:01,578 INFO L87 Difference]: Start difference. First operand 253 states and 355 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:32:01,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:01,661 INFO L93 Difference]: Finished difference Result 263 states and 365 transitions. [2021-05-06 02:32:01,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:32:01,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2021-05-06 02:32:01,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:01,663 INFO L225 Difference]: With dead ends: 263 [2021-05-06 02:32:01,663 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 02:32:01,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:32:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 02:32:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-05-06 02:32:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 160 states have internal predecessors, (197), 82 states have call successors, (82), 21 states have call predecessors, (82), 20 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-06 02:32:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 358 transitions. [2021-05-06 02:32:01,686 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 358 transitions. Word has length 83 [2021-05-06 02:32:01,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:01,687 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 358 transitions. [2021-05-06 02:32:01,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:32:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 358 transitions. [2021-05-06 02:32:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 02:32:01,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:01,688 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:01,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:32:01,897 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:01,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2021-05-06 02:32:01,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:01,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771648739] [2021-05-06 02:32:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:01,903 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:01,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286751657] [2021-05-06 02:32:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:01,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 02:32:01,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:02,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-06 02:32:02,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:02,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771648739] [2021-05-06 02:32:02,173 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:02,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286751657] [2021-05-06 02:32:02,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286751657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:02,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:02,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:32:02,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135284706] [2021-05-06 02:32:02,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:32:02,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:02,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:32:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:32:02,175 INFO L87 Difference]: Start difference. First operand 256 states and 358 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:32:02,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:02,483 INFO L93 Difference]: Finished difference Result 289 states and 411 transitions. [2021-05-06 02:32:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:32:02,484 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2021-05-06 02:32:02,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:02,486 INFO L225 Difference]: With dead ends: 289 [2021-05-06 02:32:02,486 INFO L226 Difference]: Without dead ends: 286 [2021-05-06 02:32:02,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:32:02,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-06 02:32:02,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2021-05-06 02:32:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 168 states have (on average 1.3035714285714286) internal successors, (219), 176 states have internal predecessors, (219), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2021-05-06 02:32:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 406 transitions. [2021-05-06 02:32:02,511 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 406 transitions. Word has length 84 [2021-05-06 02:32:02,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:02,511 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 406 transitions. [2021-05-06 02:32:02,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:32:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 406 transitions. [2021-05-06 02:32:02,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:32:02,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:02,513 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:02,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 02:32:02,737 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:02,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 2 times [2021-05-06 02:32:02,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:02,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731253386] [2021-05-06 02:32:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:02,744 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:02,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409992700] [2021-05-06 02:32:02,744 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:02,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:32:02,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:02,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:32:02,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:02,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 02:32:02,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:02,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731253386] [2021-05-06 02:32:02,995 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:02,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409992700] [2021-05-06 02:32:02,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409992700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:02,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:02,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:32:02,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885872279] [2021-05-06 02:32:02,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:32:02,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:02,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:32:02,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:32:02,996 INFO L87 Difference]: Start difference. First operand 285 states and 406 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:32:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:03,123 INFO L93 Difference]: Finished difference Result 333 states and 453 transitions. [2021-05-06 02:32:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:32:03,123 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 87 [2021-05-06 02:32:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:03,125 INFO L225 Difference]: With dead ends: 333 [2021-05-06 02:32:03,125 INFO L226 Difference]: Without dead ends: 324 [2021-05-06 02:32:03,125 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:32:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-05-06 02:32:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2021-05-06 02:32:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 196 states have (on average 1.2653061224489797) internal successors, (248), 203 states have internal predecessors, (248), 98 states have call successors, (98), 29 states have call predecessors, (98), 28 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-06 02:32:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 441 transitions. [2021-05-06 02:32:03,148 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 441 transitions. Word has length 87 [2021-05-06 02:32:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:03,148 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 441 transitions. [2021-05-06 02:32:03,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:32:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 441 transitions. [2021-05-06 02:32:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 02:32:03,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:03,150 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:03,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 02:32:03,369 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:03,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 1 times [2021-05-06 02:32:03,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:03,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752428834] [2021-05-06 02:32:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:03,375 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:03,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790267119] [2021-05-06 02:32:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:03,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:32:03,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:03,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 02:32:03,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:03,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752428834] [2021-05-06 02:32:03,574 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:03,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790267119] [2021-05-06 02:32:03,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790267119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:03,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:03,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:32:03,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222664676] [2021-05-06 02:32:03,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:32:03,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:03,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:32:03,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:32:03,575 INFO L87 Difference]: Start difference. First operand 323 states and 441 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:32:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:03,728 INFO L93 Difference]: Finished difference Result 452 states and 648 transitions. [2021-05-06 02:32:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:32:03,728 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2021-05-06 02:32:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:03,730 INFO L225 Difference]: With dead ends: 452 [2021-05-06 02:32:03,730 INFO L226 Difference]: Without dead ends: 325 [2021-05-06 02:32:03,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:32:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-06 02:32:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-05-06 02:32:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 198 states have (on average 1.2525252525252526) internal successors, (248), 205 states have internal predecessors, (248), 98 states have call successors, (98), 29 states have call predecessors, (98), 28 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-06 02:32:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 441 transitions. [2021-05-06 02:32:03,755 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 441 transitions. Word has length 89 [2021-05-06 02:32:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:03,756 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 441 transitions. [2021-05-06 02:32:03,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:32:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 441 transitions. [2021-05-06 02:32:03,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 02:32:03,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:03,757 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1] [2021-05-06 02:32:03,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 02:32:03,981 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:03,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:03,982 INFO L82 PathProgramCache]: Analyzing trace with hash 325787368, now seen corresponding path program 2 times [2021-05-06 02:32:03,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:03,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979216154] [2021-05-06 02:32:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:03,986 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:03,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278445685] [2021-05-06 02:32:03,986 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:04,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:32:04,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:04,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:32:04,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:04,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-05-06 02:32:04,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:04,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979216154] [2021-05-06 02:32:04,187 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:04,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278445685] [2021-05-06 02:32:04,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278445685] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:32:04,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:32:04,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:32:04,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397404825] [2021-05-06 02:32:04,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:32:04,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:04,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:32:04,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:32:04,188 INFO L87 Difference]: Start difference. First operand 325 states and 441 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:32:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:04,284 INFO L93 Difference]: Finished difference Result 524 states and 770 transitions. [2021-05-06 02:32:04,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:32:04,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2021-05-06 02:32:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:04,288 INFO L225 Difference]: With dead ends: 524 [2021-05-06 02:32:04,288 INFO L226 Difference]: Without dead ends: 427 [2021-05-06 02:32:04,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:32:04,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-06 02:32:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 361. [2021-05-06 02:32:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 222 states have (on average 1.2657657657657657) internal successors, (281), 229 states have internal predecessors, (281), 110 states have call successors, (110), 29 states have call predecessors, (110), 28 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 02:32:04,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 498 transitions. [2021-05-06 02:32:04,316 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 498 transitions. Word has length 93 [2021-05-06 02:32:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:04,317 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 498 transitions. [2021-05-06 02:32:04,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:32:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 498 transitions. [2021-05-06 02:32:04,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 02:32:04,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:04,320 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:04,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:32:04,533 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:04,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:04,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2021-05-06 02:32:04,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:04,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377038275] [2021-05-06 02:32:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:04,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:04,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325258174] [2021-05-06 02:32:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:04,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 02:32:04,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:04,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:04,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 44 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-05-06 02:32:05,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:05,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377038275] [2021-05-06 02:32:05,131 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:05,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325258174] [2021-05-06 02:32:05,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325258174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:05,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:05,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:32:05,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512473472] [2021-05-06 02:32:05,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:32:05,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:05,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:32:05,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:32:05,133 INFO L87 Difference]: Start difference. First operand 361 states and 498 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:32:05,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:05,641 INFO L93 Difference]: Finished difference Result 369 states and 505 transitions. [2021-05-06 02:32:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:32:05,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2021-05-06 02:32:05,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:05,645 INFO L225 Difference]: With dead ends: 369 [2021-05-06 02:32:05,645 INFO L226 Difference]: Without dead ends: 367 [2021-05-06 02:32:05,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:32:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-06 02:32:05,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2021-05-06 02:32:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 225 states have (on average 1.2622222222222221) internal successors, (284), 232 states have internal predecessors, (284), 110 states have call successors, (110), 30 states have call predecessors, (110), 29 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 02:32:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 501 transitions. [2021-05-06 02:32:05,672 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 501 transitions. Word has length 101 [2021-05-06 02:32:05,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:05,672 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 501 transitions. [2021-05-06 02:32:05,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:32:05,672 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 501 transitions. [2021-05-06 02:32:05,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 02:32:05,674 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:05,675 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:05,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:05,898 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:05,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 3 times [2021-05-06 02:32:05,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:05,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891525511] [2021-05-06 02:32:05,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:05,905 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:05,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353721486] [2021-05-06 02:32:05,905 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:05,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:32:05,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:05,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:32:05,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:06,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-05-06 02:32:06,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:06,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891525511] [2021-05-06 02:32:06,134 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:06,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353721486] [2021-05-06 02:32:06,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353721486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:06,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:06,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:32:06,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823514626] [2021-05-06 02:32:06,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:32:06,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:06,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:32:06,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:32:06,135 INFO L87 Difference]: Start difference. First operand 365 states and 501 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:32:06,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:06,228 INFO L93 Difference]: Finished difference Result 371 states and 506 transitions. [2021-05-06 02:32:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:32:06,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2021-05-06 02:32:06,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:06,230 INFO L225 Difference]: With dead ends: 371 [2021-05-06 02:32:06,230 INFO L226 Difference]: Without dead ends: 369 [2021-05-06 02:32:06,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:32:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-06 02:32:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2021-05-06 02:32:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 228 states have (on average 1.2587719298245614) internal successors, (287), 235 states have internal predecessors, (287), 110 states have call successors, (110), 31 states have call predecessors, (110), 30 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 02:32:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 504 transitions. [2021-05-06 02:32:06,260 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 504 transitions. Word has length 105 [2021-05-06 02:32:06,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:06,260 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 504 transitions. [2021-05-06 02:32:06,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:32:06,261 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 504 transitions. [2021-05-06 02:32:06,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 02:32:06,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:06,274 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:06,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-06 02:32:06,475 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:06,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:06,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 2 times [2021-05-06 02:32:06,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:06,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154597768] [2021-05-06 02:32:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:06,480 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:06,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501788981] [2021-05-06 02:32:06,480 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:06,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:32:06,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:06,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:32:06,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:06,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-05-06 02:32:06,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:06,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154597768] [2021-05-06 02:32:06,877 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:06,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501788981] [2021-05-06 02:32:06,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501788981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:06,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:06,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:32:06,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402092611] [2021-05-06 02:32:06,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:32:06,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:06,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:32:06,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:32:06,881 INFO L87 Difference]: Start difference. First operand 369 states and 504 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 02:32:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:07,420 INFO L93 Difference]: Finished difference Result 403 states and 557 transitions. [2021-05-06 02:32:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:32:07,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 107 [2021-05-06 02:32:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:07,424 INFO L225 Difference]: With dead ends: 403 [2021-05-06 02:32:07,424 INFO L226 Difference]: Without dead ends: 400 [2021-05-06 02:32:07,424 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:32:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-06 02:32:07,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2021-05-06 02:32:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 243 states have (on average 1.2674897119341564) internal successors, (308), 251 states have internal predecessors, (308), 123 states have call successors, (123), 32 states have call predecessors, (123), 31 states have return successors, (120), 114 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-06 02:32:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 551 transitions. [2021-05-06 02:32:07,463 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 551 transitions. Word has length 107 [2021-05-06 02:32:07,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:07,464 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 551 transitions. [2021-05-06 02:32:07,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 02:32:07,465 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 551 transitions. [2021-05-06 02:32:07,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 02:32:07,466 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:07,466 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:07,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:07,681 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:07,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 2 times [2021-05-06 02:32:07,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:07,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173001821] [2021-05-06 02:32:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:07,688 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:07,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351263245] [2021-05-06 02:32:07,688 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:07,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:32:07,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:07,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:32:07,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:07,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 221 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 02:32:07,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:07,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173001821] [2021-05-06 02:32:07,958 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:07,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351263245] [2021-05-06 02:32:07,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351263245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:07,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:07,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:32:07,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625863836] [2021-05-06 02:32:07,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:32:07,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:07,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:32:07,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:32:07,962 INFO L87 Difference]: Start difference. First operand 398 states and 551 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:32:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:08,120 INFO L93 Difference]: Finished difference Result 459 states and 609 transitions. [2021-05-06 02:32:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:32:08,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 110 [2021-05-06 02:32:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:08,123 INFO L225 Difference]: With dead ends: 459 [2021-05-06 02:32:08,123 INFO L226 Difference]: Without dead ends: 450 [2021-05-06 02:32:08,123 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:32:08,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-06 02:32:08,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 449. [2021-05-06 02:32:08,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 280 states have (on average 1.2357142857142858) internal successors, (346), 288 states have internal predecessors, (346), 127 states have call successors, (127), 42 states have call predecessors, (127), 41 states have return successors, (124), 118 states have call predecessors, (124), 124 states have call successors, (124) [2021-05-06 02:32:08,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 597 transitions. [2021-05-06 02:32:08,159 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 597 transitions. Word has length 110 [2021-05-06 02:32:08,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:08,159 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 597 transitions. [2021-05-06 02:32:08,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:32:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 597 transitions. [2021-05-06 02:32:08,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 02:32:08,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:08,161 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:08,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-06 02:32:08,377 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash -289933735, now seen corresponding path program 3 times [2021-05-06 02:32:08,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:08,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239966922] [2021-05-06 02:32:08,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:08,383 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:08,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285530006] [2021-05-06 02:32:08,383 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:08,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:32:08,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:08,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:32:08,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:08,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-06 02:32:08,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:08,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239966922] [2021-05-06 02:32:08,648 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:08,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285530006] [2021-05-06 02:32:08,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285530006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:08,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:08,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:32:08,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757484553] [2021-05-06 02:32:08,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:32:08,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:08,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:32:08,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:32:08,649 INFO L87 Difference]: Start difference. First operand 449 states and 597 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 02:32:08,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:08,953 INFO L93 Difference]: Finished difference Result 633 states and 901 transitions. [2021-05-06 02:32:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:32:08,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 111 [2021-05-06 02:32:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:08,957 INFO L225 Difference]: With dead ends: 633 [2021-05-06 02:32:08,957 INFO L226 Difference]: Without dead ends: 625 [2021-05-06 02:32:08,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:32:08,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-05-06 02:32:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 488. [2021-05-06 02:32:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 307 states have (on average 1.250814332247557) internal successors, (384), 315 states have internal predecessors, (384), 139 states have call successors, (139), 42 states have call predecessors, (139), 41 states have return successors, (136), 130 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-06 02:32:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 659 transitions. [2021-05-06 02:32:08,996 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 659 transitions. Word has length 111 [2021-05-06 02:32:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:08,996 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 659 transitions. [2021-05-06 02:32:08,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 02:32:08,996 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 659 transitions. [2021-05-06 02:32:08,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-06 02:32:08,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:08,997 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:09,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 02:32:09,221 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:09,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:09,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1282766646, now seen corresponding path program 2 times [2021-05-06 02:32:09,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:09,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003970425] [2021-05-06 02:32:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:09,228 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:09,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075876172] [2021-05-06 02:32:09,229 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:09,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:32:09,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:09,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:32:09,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:09,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 222 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 02:32:09,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:09,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003970425] [2021-05-06 02:32:09,484 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:09,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075876172] [2021-05-06 02:32:09,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075876172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:09,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:09,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:32:09,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349781337] [2021-05-06 02:32:09,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:32:09,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:09,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:32:09,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:32:09,485 INFO L87 Difference]: Start difference. First operand 488 states and 659 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:32:09,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:09,631 INFO L93 Difference]: Finished difference Result 681 states and 962 transitions. [2021-05-06 02:32:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:32:09,631 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 112 [2021-05-06 02:32:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:09,634 INFO L225 Difference]: With dead ends: 681 [2021-05-06 02:32:09,634 INFO L226 Difference]: Without dead ends: 490 [2021-05-06 02:32:09,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:32:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-05-06 02:32:09,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2021-05-06 02:32:09,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 309 states have (on average 1.2394822006472492) internal successors, (383), 317 states have internal predecessors, (383), 139 states have call successors, (139), 42 states have call predecessors, (139), 41 states have return successors, (136), 130 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-06 02:32:09,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 658 transitions. [2021-05-06 02:32:09,668 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 658 transitions. Word has length 112 [2021-05-06 02:32:09,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:09,669 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 658 transitions. [2021-05-06 02:32:09,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:32:09,669 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 658 transitions. [2021-05-06 02:32:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 02:32:09,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:09,670 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:09,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 02:32:09,885 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:09,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:09,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 3 times [2021-05-06 02:32:09,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:09,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031931109] [2021-05-06 02:32:09,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:09,891 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:09,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450780809] [2021-05-06 02:32:09,891 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:09,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:32:09,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:09,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:32:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:09,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 02:32:10,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:10,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031931109] [2021-05-06 02:32:10,192 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:10,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450780809] [2021-05-06 02:32:10,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450780809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:10,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:10,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:32:10,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259000863] [2021-05-06 02:32:10,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:32:10,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:10,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:32:10,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:32:10,194 INFO L87 Difference]: Start difference. First operand 490 states and 658 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:32:10,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:10,403 INFO L93 Difference]: Finished difference Result 761 states and 1039 transitions. [2021-05-06 02:32:10,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:32:10,404 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2021-05-06 02:32:10,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:10,406 INFO L225 Difference]: With dead ends: 761 [2021-05-06 02:32:10,406 INFO L226 Difference]: Without dead ends: 570 [2021-05-06 02:32:10,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:32:10,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-05-06 02:32:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2021-05-06 02:32:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 360 states have (on average 1.211111111111111) internal successors, (436), 368 states have internal predecessors, (436), 147 states have call successors, (147), 55 states have call predecessors, (147), 54 states have return successors, (143), 138 states have call predecessors, (143), 143 states have call successors, (143) [2021-05-06 02:32:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 726 transitions. [2021-05-06 02:32:10,447 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 726 transitions. Word has length 116 [2021-05-06 02:32:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:10,448 INFO L480 AbstractCegarLoop]: Abstraction has 562 states and 726 transitions. [2021-05-06 02:32:10,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:32:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 726 transitions. [2021-05-06 02:32:10,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 02:32:10,449 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:10,449 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:10,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 02:32:10,665 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:10,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1978671899, now seen corresponding path program 2 times [2021-05-06 02:32:10,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:10,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406092340] [2021-05-06 02:32:10,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:10,670 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:10,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175282296] [2021-05-06 02:32:10,671 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:10,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:32:10,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:10,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:32:10,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:10,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-05-06 02:32:10,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:10,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406092340] [2021-05-06 02:32:10,913 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:10,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175282296] [2021-05-06 02:32:10,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175282296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:10,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:10,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:32:10,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217095773] [2021-05-06 02:32:10,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:32:10,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:10,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:32:10,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:32:10,914 INFO L87 Difference]: Start difference. First operand 562 states and 726 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:32:11,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:11,158 INFO L93 Difference]: Finished difference Result 593 states and 768 transitions. [2021-05-06 02:32:11,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:32:11,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 118 [2021-05-06 02:32:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:11,161 INFO L225 Difference]: With dead ends: 593 [2021-05-06 02:32:11,161 INFO L226 Difference]: Without dead ends: 590 [2021-05-06 02:32:11,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:32:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-05-06 02:32:11,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 586. [2021-05-06 02:32:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 379 states have (on average 1.2189973614775726) internal successors, (462), 389 states have internal predecessors, (462), 151 states have call successors, (151), 56 states have call predecessors, (151), 55 states have return successors, (147), 140 states have call predecessors, (147), 147 states have call successors, (147) [2021-05-06 02:32:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 760 transitions. [2021-05-06 02:32:11,221 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 760 transitions. Word has length 118 [2021-05-06 02:32:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:11,221 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 760 transitions. [2021-05-06 02:32:11,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:32:11,221 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 760 transitions. [2021-05-06 02:32:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 02:32:11,223 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:11,223 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:11,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 02:32:11,445 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:11,445 INFO L82 PathProgramCache]: Analyzing trace with hash 992936989, now seen corresponding path program 3 times [2021-05-06 02:32:11,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:11,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888131175] [2021-05-06 02:32:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:11,456 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:11,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335293124] [2021-05-06 02:32:11,456 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:11,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:32:11,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:11,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 02:32:11,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:11,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,741 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-05-06 02:32:12,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:13,192 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-06 02:32:13,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:13,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:13,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 117 proven. 38 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-05-06 02:32:13,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:13,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888131175] [2021-05-06 02:32:13,340 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:13,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335293124] [2021-05-06 02:32:13,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335293124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:13,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:13,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:32:13,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216652178] [2021-05-06 02:32:13,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:32:13,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:13,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:32:13,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:32:13,342 INFO L87 Difference]: Start difference. First operand 586 states and 760 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:32:14,905 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-06 02:32:15,289 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-06 02:32:15,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:15,527 INFO L93 Difference]: Finished difference Result 616 states and 796 transitions. [2021-05-06 02:32:15,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:32:15,528 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 124 [2021-05-06 02:32:15,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:15,530 INFO L225 Difference]: With dead ends: 616 [2021-05-06 02:32:15,530 INFO L226 Difference]: Without dead ends: 612 [2021-05-06 02:32:15,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1777.9ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:32:15,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-05-06 02:32:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 587. [2021-05-06 02:32:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 383 states have (on average 1.2114882506527416) internal successors, (464), 392 states have internal predecessors, (464), 147 states have call successors, (147), 58 states have call predecessors, (147), 56 states have return successors, (143), 136 states have call predecessors, (143), 143 states have call successors, (143) [2021-05-06 02:32:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 754 transitions. [2021-05-06 02:32:15,578 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 754 transitions. Word has length 124 [2021-05-06 02:32:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:15,578 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 754 transitions. [2021-05-06 02:32:15,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:32:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 754 transitions. [2021-05-06 02:32:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-06 02:32:15,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:15,580 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:15,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:15,788 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:15,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1110867224, now seen corresponding path program 4 times [2021-05-06 02:32:15,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:15,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546598128] [2021-05-06 02:32:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:15,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:15,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876539950] [2021-05-06 02:32:15,796 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:15,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:32:15,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:15,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 02:32:15,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:16,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 90 proven. 104 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-05-06 02:32:16,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:16,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546598128] [2021-05-06 02:32:16,288 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:16,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876539950] [2021-05-06 02:32:16,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876539950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:16,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:16,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:32:16,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690691931] [2021-05-06 02:32:16,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:32:16,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:16,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:32:16,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:32:16,289 INFO L87 Difference]: Start difference. First operand 587 states and 754 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-05-06 02:32:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:16,707 INFO L93 Difference]: Finished difference Result 641 states and 820 transitions. [2021-05-06 02:32:16,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:32:16,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 123 [2021-05-06 02:32:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:16,710 INFO L225 Difference]: With dead ends: 641 [2021-05-06 02:32:16,710 INFO L226 Difference]: Without dead ends: 639 [2021-05-06 02:32:16,711 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:32:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-05-06 02:32:16,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 633. [2021-05-06 02:32:16,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 410 states have (on average 1.2097560975609756) internal successors, (496), 420 states have internal predecessors, (496), 160 states have call successors, (160), 64 states have call predecessors, (160), 62 states have return successors, (156), 148 states have call predecessors, (156), 156 states have call successors, (156) [2021-05-06 02:32:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 812 transitions. [2021-05-06 02:32:16,757 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 812 transitions. Word has length 123 [2021-05-06 02:32:16,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:16,757 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 812 transitions. [2021-05-06 02:32:16,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-05-06 02:32:16,757 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 812 transitions. [2021-05-06 02:32:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-06 02:32:16,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:16,759 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:16,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 02:32:16,982 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:16,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:16,983 INFO L82 PathProgramCache]: Analyzing trace with hash -270396677, now seen corresponding path program 5 times [2021-05-06 02:32:16,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:16,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889081713] [2021-05-06 02:32:16,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:16,988 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:16,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082692393] [2021-05-06 02:32:16,988 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:17,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:32:17,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:17,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-06 02:32:17,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:17,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 91 proven. 138 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-05-06 02:32:17,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:17,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889081713] [2021-05-06 02:32:17,556 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:17,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082692393] [2021-05-06 02:32:17,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082692393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:17,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:17,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:32:17,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796563204] [2021-05-06 02:32:17,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:32:17,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:17,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:32:17,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:32:17,557 INFO L87 Difference]: Start difference. First operand 633 states and 812 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 02:32:18,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:18,271 INFO L93 Difference]: Finished difference Result 645 states and 823 transitions. [2021-05-06 02:32:18,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:32:18,271 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 128 [2021-05-06 02:32:18,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:18,273 INFO L225 Difference]: With dead ends: 645 [2021-05-06 02:32:18,273 INFO L226 Difference]: Without dead ends: 643 [2021-05-06 02:32:18,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:32:18,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-05-06 02:32:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 637. [2021-05-06 02:32:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 413 states have (on average 1.208232445520581) internal successors, (499), 423 states have internal predecessors, (499), 160 states have call successors, (160), 65 states have call predecessors, (160), 63 states have return successors, (156), 148 states have call predecessors, (156), 156 states have call successors, (156) [2021-05-06 02:32:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 815 transitions. [2021-05-06 02:32:18,326 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 815 transitions. Word has length 128 [2021-05-06 02:32:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:18,326 INFO L480 AbstractCegarLoop]: Abstraction has 637 states and 815 transitions. [2021-05-06 02:32:18,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 02:32:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 815 transitions. [2021-05-06 02:32:18,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 02:32:18,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:18,328 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:18,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 02:32:18,549 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:18,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:18,549 INFO L82 PathProgramCache]: Analyzing trace with hash -677811269, now seen corresponding path program 4 times [2021-05-06 02:32:18,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:18,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032544844] [2021-05-06 02:32:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:18,557 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:18,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229619288] [2021-05-06 02:32:18,557 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:18,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:32:18,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:18,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-06 02:32:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:18,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 92 proven. 111 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-06 02:32:19,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:19,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032544844] [2021-05-06 02:32:19,204 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:19,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229619288] [2021-05-06 02:32:19,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229619288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:19,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:19,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 02:32:19,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738487349] [2021-05-06 02:32:19,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 02:32:19,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:19,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 02:32:19,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:32:19,207 INFO L87 Difference]: Start difference. First operand 637 states and 815 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2021-05-06 02:32:19,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:19,940 INFO L93 Difference]: Finished difference Result 673 states and 867 transitions. [2021-05-06 02:32:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:32:19,940 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 130 [2021-05-06 02:32:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:19,943 INFO L225 Difference]: With dead ends: 673 [2021-05-06 02:32:19,943 INFO L226 Difference]: Without dead ends: 668 [2021-05-06 02:32:19,944 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-06 02:32:19,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-05-06 02:32:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 641. [2021-05-06 02:32:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 414 states have (on average 1.2053140096618358) internal successors, (499), 425 states have internal predecessors, (499), 162 states have call successors, (162), 65 states have call predecessors, (162), 64 states have return successors, (159), 150 states have call predecessors, (159), 159 states have call successors, (159) [2021-05-06 02:32:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 820 transitions. [2021-05-06 02:32:19,994 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 820 transitions. Word has length 130 [2021-05-06 02:32:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:19,994 INFO L480 AbstractCegarLoop]: Abstraction has 641 states and 820 transitions. [2021-05-06 02:32:19,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2021-05-06 02:32:19,995 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 820 transitions. [2021-05-06 02:32:19,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-06 02:32:19,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:19,996 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:20,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:20,209 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:20,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:20,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2098906485, now seen corresponding path program 3 times [2021-05-06 02:32:20,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:20,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155570100] [2021-05-06 02:32:20,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:20,215 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:20,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871293941] [2021-05-06 02:32:20,215 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:20,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:32:20,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:20,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:32:20,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:20,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-06 02:32:20,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:20,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155570100] [2021-05-06 02:32:20,560 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:20,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871293941] [2021-05-06 02:32:20,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871293941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:20,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:20,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:32:20,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019660884] [2021-05-06 02:32:20,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:32:20,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:20,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:32:20,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:32:20,561 INFO L87 Difference]: Start difference. First operand 641 states and 820 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:32:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:20,765 INFO L93 Difference]: Finished difference Result 657 states and 838 transitions. [2021-05-06 02:32:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:32:20,765 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2021-05-06 02:32:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:20,768 INFO L225 Difference]: With dead ends: 657 [2021-05-06 02:32:20,768 INFO L226 Difference]: Without dead ends: 650 [2021-05-06 02:32:20,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:32:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-05-06 02:32:20,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2021-05-06 02:32:20,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 423 states have (on average 1.2009456264775413) internal successors, (508), 434 states have internal predecessors, (508), 162 states have call successors, (162), 65 states have call predecessors, (162), 64 states have return successors, (159), 150 states have call predecessors, (159), 159 states have call successors, (159) [2021-05-06 02:32:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 829 transitions. [2021-05-06 02:32:20,817 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 829 transitions. Word has length 133 [2021-05-06 02:32:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:20,818 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 829 transitions. [2021-05-06 02:32:20,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:32:20,818 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 829 transitions. [2021-05-06 02:32:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 02:32:20,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:20,819 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:21,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-06 02:32:21,042 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:21,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:21,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1894865945, now seen corresponding path program 5 times [2021-05-06 02:32:21,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:21,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156514256] [2021-05-06 02:32:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:21,049 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:21,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275731802] [2021-05-06 02:32:21,049 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:21,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 02:32:21,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:21,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 02:32:21,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:21,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2021-05-06 02:32:21,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:21,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156514256] [2021-05-06 02:32:21,906 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:21,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275731802] [2021-05-06 02:32:21,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275731802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:21,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:21,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:32:21,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895748893] [2021-05-06 02:32:21,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:32:21,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:21,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:32:21,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:32:21,907 INFO L87 Difference]: Start difference. First operand 650 states and 829 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:32:22,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:22,673 INFO L93 Difference]: Finished difference Result 693 states and 890 transitions. [2021-05-06 02:32:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:32:22,673 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 134 [2021-05-06 02:32:22,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:22,676 INFO L225 Difference]: With dead ends: 693 [2021-05-06 02:32:22,676 INFO L226 Difference]: Without dead ends: 690 [2021-05-06 02:32:22,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 411.6ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:32:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-05-06 02:32:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 683. [2021-05-06 02:32:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 441 states have (on average 1.2063492063492063) internal successors, (532), 453 states have internal predecessors, (532), 175 states have call successors, (175), 67 states have call predecessors, (175), 66 states have return successors, (172), 162 states have call predecessors, (172), 172 states have call successors, (172) [2021-05-06 02:32:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 879 transitions. [2021-05-06 02:32:22,735 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 879 transitions. Word has length 134 [2021-05-06 02:32:22,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:22,735 INFO L480 AbstractCegarLoop]: Abstraction has 683 states and 879 transitions. [2021-05-06 02:32:22,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:32:22,735 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 879 transitions. [2021-05-06 02:32:22,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-06 02:32:22,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:22,737 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:22,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:22,945 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:22,945 INFO L82 PathProgramCache]: Analyzing trace with hash -736314780, now seen corresponding path program 4 times [2021-05-06 02:32:22,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:22,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854592868] [2021-05-06 02:32:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:22,951 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:22,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106836152] [2021-05-06 02:32:22,951 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:23,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:32:23,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:23,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:32:23,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:23,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 40 proven. 444 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-06 02:32:23,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:23,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854592868] [2021-05-06 02:32:23,316 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:23,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106836152] [2021-05-06 02:32:23,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106836152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:23,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:23,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:32:23,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659499633] [2021-05-06 02:32:23,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:32:23,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:23,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:32:23,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:32:23,317 INFO L87 Difference]: Start difference. First operand 683 states and 879 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:32:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:23,541 INFO L93 Difference]: Finished difference Result 1014 states and 1340 transitions. [2021-05-06 02:32:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:32:23,542 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 139 [2021-05-06 02:32:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:23,545 INFO L225 Difference]: With dead ends: 1014 [2021-05-06 02:32:23,545 INFO L226 Difference]: Without dead ends: 797 [2021-05-06 02:32:23,546 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:32:23,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-05-06 02:32:23,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 787. [2021-05-06 02:32:23,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 512 states have (on average 1.18359375) internal successors, (606), 522 states have internal predecessors, (606), 192 states have call successors, (192), 84 states have call predecessors, (192), 82 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2021-05-06 02:32:23,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 986 transitions. [2021-05-06 02:32:23,606 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 986 transitions. Word has length 139 [2021-05-06 02:32:23,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:23,607 INFO L480 AbstractCegarLoop]: Abstraction has 787 states and 986 transitions. [2021-05-06 02:32:23,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:32:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 986 transitions. [2021-05-06 02:32:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-06 02:32:23,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:23,608 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:23,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-06 02:32:23,830 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:23,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:23,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2139656620, now seen corresponding path program 6 times [2021-05-06 02:32:23,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:23,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888767106] [2021-05-06 02:32:23,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:23,836 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:23,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516333571] [2021-05-06 02:32:23,836 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:24,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 02:32:24,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:24,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 02:32:24,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:24,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 86 proven. 75 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-05-06 02:32:24,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:24,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888767106] [2021-05-06 02:32:24,881 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:24,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516333571] [2021-05-06 02:32:24,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516333571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:24,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:24,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:32:24,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201234294] [2021-05-06 02:32:24,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:32:24,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:24,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:32:24,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:32:24,882 INFO L87 Difference]: Start difference. First operand 787 states and 986 transitions. Second operand has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 02:32:25,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:25,691 INFO L93 Difference]: Finished difference Result 909 states and 1167 transitions. [2021-05-06 02:32:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:32:25,692 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 146 [2021-05-06 02:32:25,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:25,694 INFO L225 Difference]: With dead ends: 909 [2021-05-06 02:32:25,694 INFO L226 Difference]: Without dead ends: 907 [2021-05-06 02:32:25,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-06 02:32:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-05-06 02:32:25,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 891. [2021-05-06 02:32:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 572 states have (on average 1.2062937062937062) internal successors, (690), 585 states have internal predecessors, (690), 231 states have call successors, (231), 89 states have call predecessors, (231), 87 states have return successors, (227), 216 states have call predecessors, (227), 227 states have call successors, (227) [2021-05-06 02:32:25,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1148 transitions. [2021-05-06 02:32:25,767 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1148 transitions. Word has length 146 [2021-05-06 02:32:25,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:25,767 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 1148 transitions. [2021-05-06 02:32:25,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 02:32:25,767 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1148 transitions. [2021-05-06 02:32:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 02:32:25,769 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:25,769 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:25,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 02:32:25,976 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:25,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:25,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1613652297, now seen corresponding path program 7 times [2021-05-06 02:32:25,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:25,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774172357] [2021-05-06 02:32:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:25,984 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:25,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737807744] [2021-05-06 02:32:25,984 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:26,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 111 conjunts are in the unsatisfiable core [2021-05-06 02:32:26,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:26,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:26,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,548 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-05-06 02:32:27,721 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-06 02:32:27,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:27,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:28,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 240 proven. 147 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-05-06 02:32:28,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:28,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774172357] [2021-05-06 02:32:28,048 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:28,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737807744] [2021-05-06 02:32:28,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737807744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:28,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:28,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 02:32:28,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718826913] [2021-05-06 02:32:28,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 02:32:28,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:28,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 02:32:28,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-06 02:32:28,049 INFO L87 Difference]: Start difference. First operand 891 states and 1148 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 13 states have call predecessors, (24), 12 states have call successors, (24) [2021-05-06 02:32:30,570 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-05-06 02:32:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:31,014 INFO L93 Difference]: Finished difference Result 953 states and 1220 transitions. [2021-05-06 02:32:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 02:32:31,015 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 13 states have call predecessors, (24), 12 states have call successors, (24) Word has length 151 [2021-05-06 02:32:31,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:31,019 INFO L225 Difference]: With dead ends: 953 [2021-05-06 02:32:31,019 INFO L226 Difference]: Without dead ends: 951 [2021-05-06 02:32:31,021 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1991.6ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 02:32:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-05-06 02:32:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 945. [2021-05-06 02:32:31,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 605 states have (on average 1.203305785123967) internal successors, (728), 619 states have internal predecessors, (728), 244 states have call successors, (244), 97 states have call predecessors, (244), 95 states have return successors, (240), 228 states have call predecessors, (240), 240 states have call successors, (240) [2021-05-06 02:32:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1212 transitions. [2021-05-06 02:32:31,110 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1212 transitions. Word has length 151 [2021-05-06 02:32:31,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:31,111 INFO L480 AbstractCegarLoop]: Abstraction has 945 states and 1212 transitions. [2021-05-06 02:32:31,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 13 states have call predecessors, (24), 12 states have call successors, (24) [2021-05-06 02:32:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1212 transitions. [2021-05-06 02:32:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 02:32:31,112 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:31,112 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:31,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 02:32:31,318 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:31,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:31,318 INFO L82 PathProgramCache]: Analyzing trace with hash 40428859, now seen corresponding path program 8 times [2021-05-06 02:32:31,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:31,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293999439] [2021-05-06 02:32:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:31,323 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:31,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205685591] [2021-05-06 02:32:31,323 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:31,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:32:31,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:31,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 02:32:31,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:31,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-05-06 02:32:31,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:31,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293999439] [2021-05-06 02:32:31,850 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:31,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205685591] [2021-05-06 02:32:31,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205685591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:31,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:31,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:32:31,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446542250] [2021-05-06 02:32:31,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:32:31,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:31,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:32:31,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:32:31,852 INFO L87 Difference]: Start difference. First operand 945 states and 1212 transitions. Second operand has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 02:32:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:32,723 INFO L93 Difference]: Finished difference Result 957 states and 1223 transitions. [2021-05-06 02:32:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:32:32,724 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 151 [2021-05-06 02:32:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:32,727 INFO L225 Difference]: With dead ends: 957 [2021-05-06 02:32:32,727 INFO L226 Difference]: Without dead ends: 955 [2021-05-06 02:32:32,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:32:32,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-05-06 02:32:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 949. [2021-05-06 02:32:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 608 states have (on average 1.2023026315789473) internal successors, (731), 622 states have internal predecessors, (731), 244 states have call successors, (244), 98 states have call predecessors, (244), 96 states have return successors, (240), 228 states have call predecessors, (240), 240 states have call successors, (240) [2021-05-06 02:32:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1215 transitions. [2021-05-06 02:32:32,795 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1215 transitions. Word has length 151 [2021-05-06 02:32:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:32,795 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 1215 transitions. [2021-05-06 02:32:32,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 02:32:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1215 transitions. [2021-05-06 02:32:32,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-06 02:32:32,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:32,797 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:33,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-06 02:32:33,009 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1238694007, now seen corresponding path program 6 times [2021-05-06 02:32:33,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:33,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840803471] [2021-05-06 02:32:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:33,014 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:33,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786471400] [2021-05-06 02:32:33,014 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:33,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 02:32:33,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:33,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 02:32:33,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:33,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:33,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:33,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 87 proven. 29 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2021-05-06 02:32:33,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:33,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840803471] [2021-05-06 02:32:33,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:33,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786471400] [2021-05-06 02:32:33,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786471400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:33,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:33,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:32:33,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713310756] [2021-05-06 02:32:33,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:32:33,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:33,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:32:33,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:32:33,352 INFO L87 Difference]: Start difference. First operand 949 states and 1215 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-06 02:32:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:33,622 INFO L93 Difference]: Finished difference Result 977 states and 1239 transitions. [2021-05-06 02:32:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:32:33,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 153 [2021-05-06 02:32:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:33,626 INFO L225 Difference]: With dead ends: 977 [2021-05-06 02:32:33,626 INFO L226 Difference]: Without dead ends: 971 [2021-05-06 02:32:33,626 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:32:33,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-05-06 02:32:33,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 962. [2021-05-06 02:32:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 618 states have (on average 1.1941747572815533) internal successors, (738), 632 states have internal predecessors, (738), 243 states have call successors, (243), 101 states have call predecessors, (243), 100 states have return successors, (240), 228 states have call predecessors, (240), 240 states have call successors, (240) [2021-05-06 02:32:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1221 transitions. [2021-05-06 02:32:33,725 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1221 transitions. Word has length 153 [2021-05-06 02:32:33,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:33,726 INFO L480 AbstractCegarLoop]: Abstraction has 962 states and 1221 transitions. [2021-05-06 02:32:33,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-06 02:32:33,726 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1221 transitions. [2021-05-06 02:32:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-06 02:32:33,727 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:33,728 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:33,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:33,951 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:33,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:33,952 INFO L82 PathProgramCache]: Analyzing trace with hash -490494897, now seen corresponding path program 4 times [2021-05-06 02:32:33,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:33,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781286142] [2021-05-06 02:32:33,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:33,956 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:33,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175057365] [2021-05-06 02:32:33,957 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:34,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:32:34,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:34,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:32:34,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:34,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 40 proven. 718 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 02:32:34,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:34,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781286142] [2021-05-06 02:32:34,301 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:34,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175057365] [2021-05-06 02:32:34,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175057365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:34,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:34,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:32:34,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577532454] [2021-05-06 02:32:34,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:32:34,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:34,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:32:34,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:32:34,302 INFO L87 Difference]: Start difference. First operand 962 states and 1221 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 02:32:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:34,516 INFO L93 Difference]: Finished difference Result 981 states and 1243 transitions. [2021-05-06 02:32:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:32:34,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 156 [2021-05-06 02:32:34,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:34,520 INFO L225 Difference]: With dead ends: 981 [2021-05-06 02:32:34,520 INFO L226 Difference]: Without dead ends: 974 [2021-05-06 02:32:34,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:32:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-05-06 02:32:34,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 974. [2021-05-06 02:32:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 630 states have (on average 1.1904761904761905) internal successors, (750), 644 states have internal predecessors, (750), 243 states have call successors, (243), 101 states have call predecessors, (243), 100 states have return successors, (240), 228 states have call predecessors, (240), 240 states have call successors, (240) [2021-05-06 02:32:34,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1233 transitions. [2021-05-06 02:32:34,604 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1233 transitions. Word has length 156 [2021-05-06 02:32:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:34,604 INFO L480 AbstractCegarLoop]: Abstraction has 974 states and 1233 transitions. [2021-05-06 02:32:34,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 02:32:34,604 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1233 transitions. [2021-05-06 02:32:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 02:32:34,606 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:34,606 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:34,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-06 02:32:34,820 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:34,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:34,821 INFO L82 PathProgramCache]: Analyzing trace with hash 216017621, now seen corresponding path program 7 times [2021-05-06 02:32:34,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:34,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009719155] [2021-05-06 02:32:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:34,830 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:34,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684458825] [2021-05-06 02:32:34,830 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:34,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 90 conjunts are in the unsatisfiable core [2021-05-06 02:32:34,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:35,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:35,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:36,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:36,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:36,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:36,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:36,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:36,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 194 proven. 151 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2021-05-06 02:32:36,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:36,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009719155] [2021-05-06 02:32:36,078 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:36,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684458825] [2021-05-06 02:32:36,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684458825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:36,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:36,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:32:36,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890322563] [2021-05-06 02:32:36,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 02:32:36,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:36,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 02:32:36,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:32:36,079 INFO L87 Difference]: Start difference. First operand 974 states and 1233 transitions. Second operand has 18 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 02:32:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:37,407 INFO L93 Difference]: Finished difference Result 1007 states and 1286 transitions. [2021-05-06 02:32:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:32:37,407 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 157 [2021-05-06 02:32:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:37,408 INFO L225 Difference]: With dead ends: 1007 [2021-05-06 02:32:37,408 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:32:37,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1064.2ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-06 02:32:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:32:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:32:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 02:32:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:32:37,410 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 157 [2021-05-06 02:32:37,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:37,410 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:32:37,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 02:32:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:32:37,411 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:32:37,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-06 02:32:37,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:32:37,954 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 183 [2021-05-06 02:32:38,266 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 223 [2021-05-06 02:32:38,526 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 178 [2021-05-06 02:32:38,867 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 216 [2021-05-06 02:32:39,220 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 214 [2021-05-06 02:32:41,638 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 168 DAG size of output: 33 [2021-05-06 02:32:43,007 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 225 DAG size of output: 35 [2021-05-06 02:32:43,424 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2021-05-06 02:32:44,545 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 163 DAG size of output: 33 [2021-05-06 02:32:44,914 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-05-06 02:32:46,633 WARN L205 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 218 DAG size of output: 35 [2021-05-06 02:32:48,065 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 217 DAG size of output: 32 [2021-05-06 02:32:48,111 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-06 02:32:48,111 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-06 02:32:48,111 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-06 02:32:48,111 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:32:48,112 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 02:32:48,112 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:32:48,112 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:32:48,112 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-06 02:32:48,112 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:32:48,112 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:32:48,112 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-06 02:32:48,112 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-06 02:32:48,112 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:32:48,112 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:32:48,112 INFO L198 CegarLoopUtils]: For program point L25(line 25) no Hoare annotation was computed. [2021-05-06 02:32:48,112 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 19 73) no Hoare annotation was computed. [2021-05-06 02:32:48,112 INFO L198 CegarLoopUtils]: For program point L50(lines 46 55) no Hoare annotation was computed. [2021-05-06 02:32:48,113 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse2 (<= 1 main_~y~0))) (or (not (<= |old(~counter~0)| 0)) (and (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) .cse0 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse1 .cse2) (and .cse0 (= main_~k~0 0) .cse1 .cse2 (= main_~c~0 main_~a~0)))) [2021-05-06 02:32:48,113 INFO L198 CegarLoopUtils]: For program point L46-1(lines 46 55) no Hoare annotation was computed. [2021-05-06 02:32:48,113 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 19 73) no Hoare annotation was computed. [2021-05-06 02:32:48,113 INFO L194 CegarLoopUtils]: At program point L46-3(lines 46 55) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse1) (not (<= |old(~counter~0)| 0)) (and .cse0 (= main_~k~0 0) (= main_~c~0 main_~a~0) .cse1))) [2021-05-06 02:32:48,113 INFO L198 CegarLoopUtils]: For program point L46-4(lines 46 55) no Hoare annotation was computed. [2021-05-06 02:32:48,113 INFO L198 CegarLoopUtils]: For program point L40(lines 40 67) no Hoare annotation was computed. [2021-05-06 02:32:48,113 INFO L198 CegarLoopUtils]: For program point L71(line 71) no Hoare annotation was computed. [2021-05-06 02:32:48,113 INFO L194 CegarLoopUtils]: At program point L40-2(lines 38 67) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-06 02:32:48,113 INFO L194 CegarLoopUtils]: At program point L40-3(lines 40 67) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-06 02:32:48,113 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 19 73) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-06 02:32:48,113 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-06 02:32:48,113 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (= ~counter~0 |old(~counter~0)|))) [2021-05-06 02:32:48,113 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) (<= 1 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0))) [2021-05-06 02:32:48,114 INFO L194 CegarLoopUtils]: At program point L47(line 47) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse1) (not (<= |old(~counter~0)| 0)) (and .cse0 (= main_~k~0 0) (= main_~c~0 main_~a~0) .cse1))) [2021-05-06 02:32:48,114 INFO L194 CegarLoopUtils]: At program point L47-1(line 47) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (not (<= |old(~counter~0)| 0)) (and (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) .cse0 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse1) (and .cse0 (= main_~k~0 0) .cse1 (= main_~c~0 main_~a~0)))) [2021-05-06 02:32:48,114 INFO L198 CegarLoopUtils]: For program point L41(lines 41 42) no Hoare annotation was computed. [2021-05-06 02:32:48,114 INFO L194 CegarLoopUtils]: At program point L70(line 70) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-06 02:32:48,114 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) (<= 1 main_~x~0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (<= 1 main_~b~0) (= ~counter~0 |old(~counter~0)|) (= main_~p~0 1) (= main_~s~0 1))) [2021-05-06 02:32:48,114 INFO L194 CegarLoopUtils]: At program point L37-1(line 37) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) (<= 1 main_~x~0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (< main_~xy~0 2147483647) (<= 1 main_~b~0) (= ~counter~0 |old(~counter~0)|) (= main_~p~0 1) (= main_~s~0 1))) [2021-05-06 02:32:48,114 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-06 02:32:48,114 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-06 02:32:48,114 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-06 02:32:48,114 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:32:48,114 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:32:48,114 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-06 02:32:48,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:32:48 BoogieIcfgContainer [2021-05-06 02:32:48,131 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:32:48,131 INFO L168 Benchmark]: Toolchain (without parser) took 58449.81 ms. Allocated memory was 207.6 MB in the beginning and 639.6 MB in the end (delta: 432.0 MB). Free memory was 173.0 MB in the beginning and 366.1 MB in the end (delta: -193.2 MB). Peak memory consumption was 368.7 MB. Max. memory is 8.0 GB. [2021-05-06 02:32:48,132 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 207.6 MB. Free memory is still 189.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:32:48,132 INFO L168 Benchmark]: CACSL2BoogieTranslator took 196.35 ms. Allocated memory is still 207.6 MB. Free memory was 172.8 MB in the beginning and 162.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 02:32:48,132 INFO L168 Benchmark]: Boogie Preprocessor took 67.73 ms. Allocated memory is still 207.6 MB. Free memory was 162.5 MB in the beginning and 190.7 MB in the end (delta: -28.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:32:48,132 INFO L168 Benchmark]: RCFGBuilder took 402.55 ms. Allocated memory is still 207.6 MB. Free memory was 190.7 MB in the beginning and 172.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:32:48,132 INFO L168 Benchmark]: TraceAbstraction took 57775.11 ms. Allocated memory was 207.6 MB in the beginning and 639.6 MB in the end (delta: 432.0 MB). Free memory was 171.9 MB in the beginning and 366.1 MB in the end (delta: -194.3 MB). Peak memory consumption was 369.2 MB. Max. memory is 8.0 GB. [2021-05-06 02:32:48,134 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 207.6 MB. Free memory is still 189.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 196.35 ms. Allocated memory is still 207.6 MB. Free memory was 172.8 MB in the beginning and 162.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 67.73 ms. Allocated memory is still 207.6 MB. Free memory was 162.5 MB in the beginning and 190.7 MB in the end (delta: -28.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 402.55 ms. Allocated memory is still 207.6 MB. Free memory was 190.7 MB in the beginning and 172.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 57775.11 ms. Allocated memory was 207.6 MB in the beginning and 639.6 MB in the end (delta: 432.0 MB). Free memory was 171.9 MB in the beginning and 366.1 MB in the end (delta: -194.3 MB). Peak memory consumption was 369.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 47205.6ms, OverallIterations: 43, TraceHistogramMax: 21, EmptinessCheckTime: 64.7ms, AutomataDifference: 17244.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 10497.4ms, InitialAbstractionConstructionTime: 15.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2319 SDtfs, 1642 SDslu, 11277 SDs, 0 SdLazy, 10079 SolverSat, 1344 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10858.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4179 GetRequests, 3647 SyntacticMatches, 17 SemanticMatches, 515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 9169.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=974occurred in iteration=42, InterpolantAutomatonStates: 479, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1464.8ms AutomataMinimizationTime, 43 MinimizatonAttempts, 442 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 640 PreInvPairs, 1013 NumberOfFragments, 451 HoareAnnotationTreeSize, 640 FomulaSimplifications, 344212 FormulaSimplificationTreeSizeReduction, 1969.1ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 19664 FormulaSimplificationTreeSizeReductionInter, 8488.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 511.8ms SsaConstructionTime, 2745.9ms SatisfiabilityAnalysisTime, 14131.2ms InterpolantComputationTime, 4062 NumberOfCodeBlocks, 3702 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 4019 ConstructedInterpolants, 0 QuantifiedInterpolants, 23357 SizeOfPredicates, 281 NumberOfNonLiveVariables, 11975 ConjunctsInSsa, 1249 ConjunctsInUnsatCore, 43 InterpolantComputations, 4 PerfectInterpolantSequences, 9884/13557 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((((1 <= x && a == k * b + c) && b == y * s + x * q) && a == y * r + x * p) && 1 <= y) || !(\old(counter) <= 0)) || (((1 <= x && k == 0) && c == a) && 1 <= y) - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || (1 <= x && 1 <= y) RESULT: Ultimate proved your program to be correct! Received shutdown request...