/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/ps4-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:44:22,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:44:22,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:44:22,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:44:22,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:44:22,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:44:22,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:44:22,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:44:22,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:44:22,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:44:22,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:44:22,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:44:22,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:44:22,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:44:22,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:44:22,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:44:22,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:44:22,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:44:22,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:44:22,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:44:22,999 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 04:44:23,028 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:44:23,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:44:23,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:44:23,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:44:23,030 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:44:23,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:44:23,031 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:44:23,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:44:23,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:44:23,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:44:23,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:44:23,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:44:23,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:44:23,032 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:44:23,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:44:23,032 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:44:23,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:44:23,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:44:23,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:44:23,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:44:23,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:44:23,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:44:23,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:44:23,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:44:23,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:44:23,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:44:23,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:44:23,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:44:23,034 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:44:23,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:44:23,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:44:23,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:44:23,313 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:44:23,313 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:44:23,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound100.c [2021-05-06 04:44:23,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0927eb418/945e8cc1434e4ecbac1619e969cd90ea/FLAG178985708 [2021-05-06 04:44:23,762 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:44:23,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound100.c [2021-05-06 04:44:23,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0927eb418/945e8cc1434e4ecbac1619e969cd90ea/FLAG178985708 [2021-05-06 04:44:23,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0927eb418/945e8cc1434e4ecbac1619e969cd90ea [2021-05-06 04:44:23,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:44:23,783 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:44:23,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:23,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:44:23,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:44:23,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:23" (1/1) ... [2021-05-06 04:44:23,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e5c261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:23, skipping insertion in model container [2021-05-06 04:44:23,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:23" (1/1) ... [2021-05-06 04:44:23,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:44:23,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:44:23,914 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/ps4-ll_unwindbound100.c[458,471] [2021-05-06 04:44:23,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:23,932 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:44:23,941 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/ps4-ll_unwindbound100.c[458,471] [2021-05-06 04:44:23,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:23,990 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:44:23,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:23 WrapperNode [2021-05-06 04:44:23,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:24,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:44:24,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:44:24,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:44:24,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:23" (1/1) ... [2021-05-06 04:44:24,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:23" (1/1) ... [2021-05-06 04:44:24,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:23" (1/1) ... [2021-05-06 04:44:24,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:23" (1/1) ... [2021-05-06 04:44:24,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:23" (1/1) ... [2021-05-06 04:44:24,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:23" (1/1) ... [2021-05-06 04:44:24,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:23" (1/1) ... [2021-05-06 04:44:24,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:44:24,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:44:24,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:44:24,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:44:24,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:44:24,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:44:24,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:44:24,107 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:44:24,108 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:44:24,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:44:24,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:44:24,108 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:44:24,108 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:44:24,108 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:44:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:44:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 04:44:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:44:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:44:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:44:24,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:44:24,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:44:24,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:44:24,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:44:24,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:44:24,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:44:24,320 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:44:24,320 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:44:24,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:24 BoogieIcfgContainer [2021-05-06 04:44:24,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:44:24,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:44:24,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:44:24,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:44:24,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:44:23" (1/3) ... [2021-05-06 04:44:24,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f51a662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:24, skipping insertion in model container [2021-05-06 04:44:24,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:23" (2/3) ... [2021-05-06 04:44:24,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f51a662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:24, skipping insertion in model container [2021-05-06 04:44:24,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:24" (3/3) ... [2021-05-06 04:44:24,327 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound100.c [2021-05-06 04:44:24,330 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:44:24,333 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:44:24,358 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:44:24,371 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:44:24,371 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:44:24,371 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:44:24,371 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:44:24,371 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:44:24,371 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:44:24,371 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:44:24,371 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:44:24,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:24,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 04:44:24,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:24,384 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:24,384 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:24,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:24,388 INFO L82 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times [2021-05-06 04:44:24,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:24,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771158255] [2021-05-06 04:44:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:24,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:44:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:24,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:24,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771158255] [2021-05-06 04:44:24,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771158255] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:24,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:24,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:44:24,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452816215] [2021-05-06 04:44:24,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:44:24,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:24,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:44:24,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:24,536 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:24,612 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-05-06 04:44:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:44:24,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 04:44:24,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:24,618 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:44:24,618 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 04:44:24,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 04:44:24,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-06 04:44:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-06 04:44:24,640 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-06 04:44:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:24,641 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-06 04:44:24,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-06 04:44:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 04:44:24,641 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:24,642 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:24,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:44:24,642 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:24,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times [2021-05-06 04:44:24,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:24,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224175710] [2021-05-06 04:44:24,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:24,655 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:24,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376026042] [2021-05-06 04:44:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:24,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 04:44:24,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:24,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:24,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:24,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:24,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:24,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:24,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:24,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224175710] [2021-05-06 04:44:24,824 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:24,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376026042] [2021-05-06 04:44:24,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376026042] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:24,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:24,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 04:44:24,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49695547] [2021-05-06 04:44:24,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 04:44:24,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:24,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 04:44:24,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:44:24,826 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:24,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:24,835 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-06 04:44:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 04:44:24,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 04:44:24,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:24,836 INFO L225 Difference]: With dead ends: 28 [2021-05-06 04:44:24,836 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 04:44:24,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:44:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 04:44:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 04:44:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-06 04:44:24,840 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-06 04:44:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:24,840 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-06 04:44:24,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-06 04:44:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 04:44:24,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:24,841 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:25,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:44:25,058 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:25,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:25,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 1 times [2021-05-06 04:44:25,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:25,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242089661] [2021-05-06 04:44:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:25,082 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:25,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645074271] [2021-05-06 04:44:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:25,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:44:25,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:25,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:25,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:25,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242089661] [2021-05-06 04:44:25,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:25,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645074271] [2021-05-06 04:44:25,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645074271] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:25,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:25,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:44:25,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260579175] [2021-05-06 04:44:25,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:44:25,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:25,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:44:25,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:44:25,173 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:25,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:25,204 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-05-06 04:44:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:44:25,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 04:44:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:25,205 INFO L225 Difference]: With dead ends: 30 [2021-05-06 04:44:25,205 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 04:44:25,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:25,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 04:44:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 04:44:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 04:44:25,211 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-06 04:44:25,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:25,211 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 04:44:25,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 04:44:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 04:44:25,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:25,212 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:25,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:25,425 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:25,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:25,426 INFO L82 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 1 times [2021-05-06 04:44:25,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:25,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984523687] [2021-05-06 04:44:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:25,435 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:25,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813816002] [2021-05-06 04:44:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:25,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:44:25,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:25,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:25,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:25,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984523687] [2021-05-06 04:44:25,565 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:25,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813816002] [2021-05-06 04:44:25,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813816002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:25,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:25,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 04:44:25,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465584594] [2021-05-06 04:44:25,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:44:25,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:25,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:44:25,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:44:25,566 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:25,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:25,587 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-06 04:44:25,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:44:25,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 04:44:25,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:25,588 INFO L225 Difference]: With dead ends: 36 [2021-05-06 04:44:25,588 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 04:44:25,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:25,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 04:44:25,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 04:44:25,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 04:44:25,592 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-06 04:44:25,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:25,592 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 04:44:25,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:25,592 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 04:44:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 04:44:25,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:25,593 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:25,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:25,817 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:25,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:25,818 INFO L82 PathProgramCache]: Analyzing trace with hash -261798320, now seen corresponding path program 1 times [2021-05-06 04:44:25,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:25,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737311442] [2021-05-06 04:44:25,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:25,834 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:25,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371311872] [2021-05-06 04:44:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:25,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:44:25,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:25,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:25,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:25,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737311442] [2021-05-06 04:44:25,960 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:25,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371311872] [2021-05-06 04:44:25,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371311872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:25,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:25,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:44:25,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888282129] [2021-05-06 04:44:25,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:44:25,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:25,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:44:25,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:25,962 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:25,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:25,996 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-06 04:44:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:44:25,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 04:44:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:25,997 INFO L225 Difference]: With dead ends: 38 [2021-05-06 04:44:25,997 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 04:44:25,998 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 04:44:26,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 04:44:26,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:26,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-06 04:44:26,002 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-06 04:44:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:26,003 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-06 04:44:26,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-06 04:44:26,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 04:44:26,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:26,003 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:26,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:26,220 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:26,220 INFO L82 PathProgramCache]: Analyzing trace with hash 891414954, now seen corresponding path program 1 times [2021-05-06 04:44:26,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:26,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818359187] [2021-05-06 04:44:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:26,227 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:26,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649294756] [2021-05-06 04:44:26,228 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 04:44:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:26,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 04:44:26,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:26,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 04:44:26,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:26,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818359187] [2021-05-06 04:44:26,467 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:26,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649294756] [2021-05-06 04:44:26,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649294756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:26,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:26,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:44:26,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903086003] [2021-05-06 04:44:26,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:44:26,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:26,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:44:26,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:26,469 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:26,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:26,556 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-06 04:44:26,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:26,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-06 04:44:26,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:26,557 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:44:26,557 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 04:44:26,558 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 04:44:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 04:44:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 04:44:26,567 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-06 04:44:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:26,568 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 04:44:26,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 04:44:26,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:44:26,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:26,568 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:26,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 04:44:26,785 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:26,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:26,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1647059121, now seen corresponding path program 2 times [2021-05-06 04:44:26,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:26,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482331469] [2021-05-06 04:44:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:26,804 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:26,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013339416] [2021-05-06 04:44:26,805 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:26,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:26,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:26,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 04:44:26,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:26,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:26,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:26,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482331469] [2021-05-06 04:44:26,925 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:26,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013339416] [2021-05-06 04:44:26,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013339416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:26,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:26,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:44:26,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630858328] [2021-05-06 04:44:26,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:44:26,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:26,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:44:26,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:26,926 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:26,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:26,965 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-06 04:44:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:44:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 04:44:26,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:26,968 INFO L225 Difference]: With dead ends: 44 [2021-05-06 04:44:26,968 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 04:44:26,969 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:44:26,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 04:44:26,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 04:44:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:26,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-06 04:44:26,985 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-05-06 04:44:26,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:26,985 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-06 04:44:26,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:26,985 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-06 04:44:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:44:26,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:26,986 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:27,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:27,206 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:27,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1645271661, now seen corresponding path program 2 times [2021-05-06 04:44:27,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:27,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199614898] [2021-05-06 04:44:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:27,212 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:27,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754833454] [2021-05-06 04:44:27,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:27,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:27,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:27,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 04:44:27,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:27,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 04:44:27,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:27,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199614898] [2021-05-06 04:44:27,353 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:27,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754833454] [2021-05-06 04:44:27,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754833454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:27,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:27,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:44:27,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820797762] [2021-05-06 04:44:27,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:44:27,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:27,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:44:27,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:27,354 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:27,454 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-05-06 04:44:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:27,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 04:44:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:27,455 INFO L225 Difference]: With dead ends: 46 [2021-05-06 04:44:27,455 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 04:44:27,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 04:44:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 04:44:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-06 04:44:27,459 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-05-06 04:44:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:27,459 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-06 04:44:27,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:27,459 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-06 04:44:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 04:44:27,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:27,460 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:27,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:27,673 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:27,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1036651181, now seen corresponding path program 2 times [2021-05-06 04:44:27,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:27,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338291184] [2021-05-06 04:44:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:27,678 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:27,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121716826] [2021-05-06 04:44:27,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:27,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:27,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:27,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 04:44:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:27,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 04:44:27,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:27,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338291184] [2021-05-06 04:44:27,879 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:27,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121716826] [2021-05-06 04:44:27,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121716826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:27,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:27,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:44:27,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857725285] [2021-05-06 04:44:27,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:44:27,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:27,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:44:27,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:27,880 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:28,042 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-05-06 04:44:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:44:28,043 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-06 04:44:28,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:28,044 INFO L225 Difference]: With dead ends: 49 [2021-05-06 04:44:28,044 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 04:44:28,044 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 04:44:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 04:44:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:28,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-06 04:44:28,048 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-06 04:44:28,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:28,048 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-06 04:44:28,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:28,049 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-06 04:44:28,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 04:44:28,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:28,049 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:28,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 04:44:28,257 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:28,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:28,258 INFO L82 PathProgramCache]: Analyzing trace with hash 486001554, now seen corresponding path program 3 times [2021-05-06 04:44:28,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:28,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980229974] [2021-05-06 04:44:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:28,263 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:28,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082576353] [2021-05-06 04:44:28,263 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:28,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:44:28,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:28,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:44:28,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:28,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:28,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:28,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980229974] [2021-05-06 04:44:28,406 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:28,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082576353] [2021-05-06 04:44:28,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082576353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:28,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:28,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:44:28,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393283200] [2021-05-06 04:44:28,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:28,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:28,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:28,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:28,409 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:28,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:28,454 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-06 04:44:28,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:44:28,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-06 04:44:28,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:28,456 INFO L225 Difference]: With dead ends: 52 [2021-05-06 04:44:28,456 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 04:44:28,456 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 04:44:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 04:44:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-06 04:44:28,463 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-05-06 04:44:28,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:28,463 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-06 04:44:28,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:28,463 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-06 04:44:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 04:44:28,466 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:28,466 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:28,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:28,673 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:28,673 INFO L82 PathProgramCache]: Analyzing trace with hash 487789014, now seen corresponding path program 3 times [2021-05-06 04:44:28,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:28,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856314050] [2021-05-06 04:44:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:28,678 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:28,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410840189] [2021-05-06 04:44:28,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:28,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 04:44:28,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:28,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 04:44:28,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:28,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 04:44:28,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:28,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856314050] [2021-05-06 04:44:28,817 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:28,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410840189] [2021-05-06 04:44:28,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410840189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:28,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:28,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:44:28,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696806335] [2021-05-06 04:44:28,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:28,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:28,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:28,818 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 04:44:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:28,857 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-06 04:44:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:44:28,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-06 04:44:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:28,859 INFO L225 Difference]: With dead ends: 50 [2021-05-06 04:44:28,859 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 04:44:28,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 04:44:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 04:44:28,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-06 04:44:28,870 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-05-06 04:44:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:28,870 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-06 04:44:28,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 04:44:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-06 04:44:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 04:44:28,871 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:28,871 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:29,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:29,076 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1383171920, now seen corresponding path program 3 times [2021-05-06 04:44:29,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:29,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518099311] [2021-05-06 04:44:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:29,081 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:29,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52929805] [2021-05-06 04:44:29,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:29,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:44:29,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:29,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 04:44:29,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:29,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 04:44:29,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:29,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518099311] [2021-05-06 04:44:29,238 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:29,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52929805] [2021-05-06 04:44:29,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52929805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:29,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:29,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:44:29,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910311442] [2021-05-06 04:44:29,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:44:29,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:29,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:44:29,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:29,239 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:29,310 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-06 04:44:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:29,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-05-06 04:44:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:29,311 INFO L225 Difference]: With dead ends: 52 [2021-05-06 04:44:29,311 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 04:44:29,312 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:29,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 04:44:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 04:44:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-06 04:44:29,315 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2021-05-06 04:44:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:29,315 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-06 04:44:29,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-06 04:44:29,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 04:44:29,316 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:29,316 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:29,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 04:44:29,533 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:29,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:29,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1386691371, now seen corresponding path program 4 times [2021-05-06 04:44:29,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:29,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684267161] [2021-05-06 04:44:29,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:29,538 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:29,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207198448] [2021-05-06 04:44:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:29,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:29,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:29,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 04:44:29,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:29,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:29,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:29,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684267161] [2021-05-06 04:44:29,738 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:29,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207198448] [2021-05-06 04:44:29,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207198448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:29,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:29,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:44:29,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748866636] [2021-05-06 04:44:29,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:44:29,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:29,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:44:29,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:44:29,739 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:29,789 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-05-06 04:44:29,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 04:44:29,790 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), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-05-06 04:44:29,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:29,790 INFO L225 Difference]: With dead ends: 58 [2021-05-06 04:44:29,790 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 04:44:29,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 04:44:29,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-06 04:44:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-06 04:44:29,794 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-05-06 04:44:29,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:29,794 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-06 04:44:29,794 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), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-06 04:44:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 04:44:29,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:29,795 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:30,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 04:44:30,001 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:30,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:30,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1037185971, now seen corresponding path program 4 times [2021-05-06 04:44:30,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:30,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007568971] [2021-05-06 04:44:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:30,006 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:30,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418539547] [2021-05-06 04:44:30,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:30,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:30,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:30,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 04:44:30,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:30,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 04:44:30,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:30,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007568971] [2021-05-06 04:44:30,287 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:30,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418539547] [2021-05-06 04:44:30,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418539547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:30,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:30,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:44:30,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956660074] [2021-05-06 04:44:30,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:44:30,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:30,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:44:30,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:30,288 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:30,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:30,369 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-05-06 04:44:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:44:30,369 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-05-06 04:44:30,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:30,370 INFO L225 Difference]: With dead ends: 60 [2021-05-06 04:44:30,370 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 04:44:30,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 04:44:30,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 04:44:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-06 04:44:30,374 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-06 04:44:30,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:30,374 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-06 04:44:30,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-06 04:44:30,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 04:44:30,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:30,375 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:30,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 04:44:30,581 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:30,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:30,582 INFO L82 PathProgramCache]: Analyzing trace with hash 999934744, now seen corresponding path program 5 times [2021-05-06 04:44:30,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:30,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160317507] [2021-05-06 04:44:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:30,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:30,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670617563] [2021-05-06 04:44:30,586 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 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 04:44:30,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 04:44:30,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:30,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 04:44:30,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:30,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:30,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:30,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160317507] [2021-05-06 04:44:30,748 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:30,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670617563] [2021-05-06 04:44:30,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670617563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:30,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:30,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:44:30,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65020706] [2021-05-06 04:44:30,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:44:30,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:30,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:44:30,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:30,750 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:30,818 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-05-06 04:44:30,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 04:44:30,818 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), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2021-05-06 04:44:30,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:30,819 INFO L225 Difference]: With dead ends: 66 [2021-05-06 04:44:30,819 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 04:44:30,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:30,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 04:44:30,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 04:44:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-06 04:44:30,823 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 52 [2021-05-06 04:44:30,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:30,823 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-06 04:44:30,823 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), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:30,823 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-06 04:44:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 04:44:30,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:30,823 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:31,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:31,037 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:31,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1795671114, now seen corresponding path program 5 times [2021-05-06 04:44:31,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:31,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453162361] [2021-05-06 04:44:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:31,041 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:31,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770460498] [2021-05-06 04:44:31,041 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 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 04:44:31,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 04:44:31,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:31,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 04:44:31,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:31,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 04:44:31,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:31,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453162361] [2021-05-06 04:44:31,332 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:31,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770460498] [2021-05-06 04:44:31,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770460498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:31,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:31,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:44:31,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910709567] [2021-05-06 04:44:31,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:44:31,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:31,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:44:31,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:31,334 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:31,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:31,435 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-05-06 04:44:31,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 04:44:31,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2021-05-06 04:44:31,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:31,436 INFO L225 Difference]: With dead ends: 68 [2021-05-06 04:44:31,436 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 04:44:31,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 04:44:31,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 04:44:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:44:31,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-05-06 04:44:31,440 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2021-05-06 04:44:31,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:31,440 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-05-06 04:44:31,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:31,440 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-05-06 04:44:31,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 04:44:31,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:31,441 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:31,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:31,645 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:31,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:31,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1633541723, now seen corresponding path program 6 times [2021-05-06 04:44:31,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:31,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410686491] [2021-05-06 04:44:31,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:31,657 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:31,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263772119] [2021-05-06 04:44:31,657 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 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 04:44:31,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 04:44:31,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:31,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 04:44:31,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:31,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:31,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:31,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410686491] [2021-05-06 04:44:31,842 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:31,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263772119] [2021-05-06 04:44:31,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263772119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:31,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:31,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:44:31,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795523126] [2021-05-06 04:44:31,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:44:31,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:31,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:44:31,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:31,843 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:31,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:31,920 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-05-06 04:44:31,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 04:44:31,920 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), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 60 [2021-05-06 04:44:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:31,920 INFO L225 Difference]: With dead ends: 74 [2021-05-06 04:44:31,920 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 04:44:31,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:31,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 04:44:31,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-06 04:44:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:44:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-06 04:44:31,924 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2021-05-06 04:44:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:31,924 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-06 04:44:31,924 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), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-06 04:44:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 04:44:31,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:31,925 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:32,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:32,141 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:32,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:32,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1180930233, now seen corresponding path program 6 times [2021-05-06 04:44:32,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:32,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957942497] [2021-05-06 04:44:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:32,146 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:32,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549864057] [2021-05-06 04:44:32,146 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 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 04:44:32,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 04:44:32,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:32,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 04:44:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:32,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 04:44:32,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:32,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957942497] [2021-05-06 04:44:32,529 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:32,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549864057] [2021-05-06 04:44:32,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549864057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:32,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:32,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 04:44:32,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225938542] [2021-05-06 04:44:32,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 04:44:32,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:32,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 04:44:32,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:32,532 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:44:32,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:32,652 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-05-06 04:44:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 04:44:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 66 [2021-05-06 04:44:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:32,653 INFO L225 Difference]: With dead ends: 76 [2021-05-06 04:44:32,653 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 04:44:32,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 04:44:32,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-06 04:44:32,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:44:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-05-06 04:44:32,656 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2021-05-06 04:44:32,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:32,657 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-05-06 04:44:32,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:44:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-05-06 04:44:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 04:44:32,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:32,657 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:32,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 04:44:32,858 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1699217054, now seen corresponding path program 7 times [2021-05-06 04:44:32,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:32,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054331526] [2021-05-06 04:44:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:32,865 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:32,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502987720] [2021-05-06 04:44:32,865 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 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 04:44:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:32,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 04:44:32,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:32,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:33,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:33,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054331526] [2021-05-06 04:44:33,047 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:33,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502987720] [2021-05-06 04:44:33,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502987720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:33,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:33,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:44:33,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268376528] [2021-05-06 04:44:33,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:44:33,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:33,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:44:33,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:33,048 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:44:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:33,154 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-05-06 04:44:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 04:44:33,154 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), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 68 [2021-05-06 04:44:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:33,155 INFO L225 Difference]: With dead ends: 82 [2021-05-06 04:44:33,155 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 04:44:33,155 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 04:44:33,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 04:44:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:44:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-06 04:44:33,160 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 68 [2021-05-06 04:44:33,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:33,160 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-06 04:44:33,160 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), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:44:33,160 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-06 04:44:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 04:44:33,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:33,161 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:33,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 04:44:33,377 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:33,377 INFO L82 PathProgramCache]: Analyzing trace with hash -763940164, now seen corresponding path program 7 times [2021-05-06 04:44:33,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:33,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142582252] [2021-05-06 04:44:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:33,381 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:33,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082615640] [2021-05-06 04:44:33,381 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 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 04:44:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:33,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 04:44:33,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:33,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 16 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 04:44:33,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:33,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142582252] [2021-05-06 04:44:33,834 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:33,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082615640] [2021-05-06 04:44:33,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082615640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:33,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:33,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 04:44:33,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041320864] [2021-05-06 04:44:33,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 04:44:33,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:33,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 04:44:33,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:33,835 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:44:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:33,969 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-05-06 04:44:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 04:44:33,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 74 [2021-05-06 04:44:33,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:33,970 INFO L225 Difference]: With dead ends: 84 [2021-05-06 04:44:33,970 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 04:44:33,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:44:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 04:44:33,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-06 04:44:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:44:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-05-06 04:44:33,974 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2021-05-06 04:44:33,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:33,974 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-05-06 04:44:33,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:44:33,974 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-05-06 04:44:33,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 04:44:33,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:33,974 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:34,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 04:44:34,180 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:34,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:34,180 INFO L82 PathProgramCache]: Analyzing trace with hash 989539297, now seen corresponding path program 8 times [2021-05-06 04:44:34,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:34,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662258134] [2021-05-06 04:44:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:34,184 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:34,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398895386] [2021-05-06 04:44:34,184 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 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 04:44:34,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:34,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:34,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 04:44:34,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:34,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:34,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:34,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662258134] [2021-05-06 04:44:34,417 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:34,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398895386] [2021-05-06 04:44:34,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398895386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:34,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:34,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 04:44:34,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467542106] [2021-05-06 04:44:34,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 04:44:34,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:34,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 04:44:34,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:34,418 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:44:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:34,524 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-05-06 04:44:34,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 04:44:34,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 76 [2021-05-06 04:44:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:34,525 INFO L225 Difference]: With dead ends: 90 [2021-05-06 04:44:34,525 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 04:44:34,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:44:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 04:44:34,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-06 04:44:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:44:34,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-06 04:44:34,530 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 76 [2021-05-06 04:44:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:34,530 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-06 04:44:34,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:44:34,530 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-06 04:44:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 04:44:34,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:34,531 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:34,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 04:44:34,745 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:34,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:34,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1500110401, now seen corresponding path program 8 times [2021-05-06 04:44:34,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:34,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387105712] [2021-05-06 04:44:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:34,749 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:34,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120012672] [2021-05-06 04:44:34,749 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 04:44:35,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:35,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:35,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 04:44:35,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:35,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 18 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 04:44:35,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:35,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387105712] [2021-05-06 04:44:35,459 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:35,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120012672] [2021-05-06 04:44:35,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120012672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:35,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:35,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 04:44:35,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972337910] [2021-05-06 04:44:35,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 04:44:35,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:35,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 04:44:35,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:35,460 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:44:35,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:35,616 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-05-06 04:44:35,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 04:44:35,617 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), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2021-05-06 04:44:35,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:35,617 INFO L225 Difference]: With dead ends: 92 [2021-05-06 04:44:35,617 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 04:44:35,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:35,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 04:44:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-06 04:44:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:44:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-05-06 04:44:35,622 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2021-05-06 04:44:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:35,622 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-05-06 04:44:35,622 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), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:44:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-05-06 04:44:35,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 04:44:35,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:35,622 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:35,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 04:44:35,827 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:35,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:35,828 INFO L82 PathProgramCache]: Analyzing trace with hash -2095421916, now seen corresponding path program 9 times [2021-05-06 04:44:35,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:35,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150864270] [2021-05-06 04:44:35,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:35,833 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:35,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503337098] [2021-05-06 04:44:35,833 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 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 04:44:35,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 04:44:35,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:35,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 04:44:35,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:35,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:36,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:36,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150864270] [2021-05-06 04:44:36,102 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:36,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503337098] [2021-05-06 04:44:36,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503337098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:36,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:36,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 04:44:36,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309100643] [2021-05-06 04:44:36,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 04:44:36,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:36,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 04:44:36,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:36,103 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:44:36,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:36,246 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2021-05-06 04:44:36,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 04:44:36,247 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 84 [2021-05-06 04:44:36,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:36,247 INFO L225 Difference]: With dead ends: 98 [2021-05-06 04:44:36,247 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 04:44:36,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:44:36,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 04:44:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 04:44:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:44:36,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-06 04:44:36,252 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 84 [2021-05-06 04:44:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:36,252 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-06 04:44:36,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:44:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-06 04:44:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 04:44:36,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:36,252 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:36,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:36,457 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:36,457 INFO L82 PathProgramCache]: Analyzing trace with hash 488857026, now seen corresponding path program 9 times [2021-05-06 04:44:36,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:36,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589695397] [2021-05-06 04:44:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:36,461 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:36,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248655413] [2021-05-06 04:44:36,461 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 04:44:36,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 04:44:36,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:36,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 04:44:36,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:36,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 04:44:37,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:37,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589695397] [2021-05-06 04:44:37,196 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:37,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248655413] [2021-05-06 04:44:37,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248655413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:37,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:37,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 04:44:37,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189179287] [2021-05-06 04:44:37,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 04:44:37,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:37,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 04:44:37,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:44:37,198 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:44:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:37,387 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-05-06 04:44:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 04:44:37,388 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 90 [2021-05-06 04:44:37,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:37,388 INFO L225 Difference]: With dead ends: 100 [2021-05-06 04:44:37,388 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 04:44:37,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:44:37,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 04:44:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-06 04:44:37,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:44:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-05-06 04:44:37,393 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2021-05-06 04:44:37,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:37,393 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-05-06 04:44:37,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:44:37,393 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-05-06 04:44:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 04:44:37,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:37,394 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:37,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 04:44:37,601 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:37,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:37,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1958171289, now seen corresponding path program 10 times [2021-05-06 04:44:37,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:37,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905952147] [2021-05-06 04:44:37,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:37,605 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:37,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937562111] [2021-05-06 04:44:37,605 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 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 04:44:38,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:38,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:38,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 04:44:38,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:38,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:38,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:38,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905952147] [2021-05-06 04:44:38,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:38,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937562111] [2021-05-06 04:44:38,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937562111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:38,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:38,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 04:44:38,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247979543] [2021-05-06 04:44:38,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 04:44:38,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:38,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 04:44:38,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:38,270 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:44:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:38,406 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2021-05-06 04:44:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 04:44:38,407 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 92 [2021-05-06 04:44:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:38,407 INFO L225 Difference]: With dead ends: 106 [2021-05-06 04:44:38,407 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 04:44:38,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-06 04:44:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 04:44:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 04:44:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:44:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-06 04:44:38,412 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 92 [2021-05-06 04:44:38,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:38,412 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-06 04:44:38,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:44:38,412 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-06 04:44:38,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 04:44:38,417 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:38,417 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:38,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:38,617 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:38,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2105665221, now seen corresponding path program 10 times [2021-05-06 04:44:38,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:38,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828799229] [2021-05-06 04:44:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:38,621 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:38,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480032032] [2021-05-06 04:44:38,621 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 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 04:44:39,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:39,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:39,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-06 04:44:39,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:39,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 22 proven. 220 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 04:44:39,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:39,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828799229] [2021-05-06 04:44:39,689 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:39,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480032032] [2021-05-06 04:44:39,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480032032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:39,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:39,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 04:44:39,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328365780] [2021-05-06 04:44:39,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 04:44:39,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:39,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 04:44:39,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:39,690 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:44:39,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:39,899 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-05-06 04:44:39,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 04:44:39,900 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 98 [2021-05-06 04:44:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:39,901 INFO L225 Difference]: With dead ends: 108 [2021-05-06 04:44:39,901 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 04:44:39,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:39,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 04:44:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 04:44:39,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:44:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-05-06 04:44:39,905 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2021-05-06 04:44:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:39,905 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-05-06 04:44:39,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:44:39,905 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-05-06 04:44:39,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 04:44:39,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:39,906 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:40,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 04:44:40,106 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:40,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:40,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1311310250, now seen corresponding path program 11 times [2021-05-06 04:44:40,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:40,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068537420] [2021-05-06 04:44:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:40,111 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:40,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596542325] [2021-05-06 04:44:40,111 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 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 04:44:40,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 04:44:40,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:40,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 04:44:40,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:40,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:40,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:40,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068537420] [2021-05-06 04:44:40,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:40,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596542325] [2021-05-06 04:44:40,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596542325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:40,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:40,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 04:44:40,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559567240] [2021-05-06 04:44:40,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 04:44:40,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:40,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 04:44:40,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:44:40,707 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:44:40,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:40,841 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2021-05-06 04:44:40,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 04:44:40,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 100 [2021-05-06 04:44:40,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:40,841 INFO L225 Difference]: With dead ends: 114 [2021-05-06 04:44:40,841 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 04:44:40,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-06 04:44:40,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 04:44:40,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-06 04:44:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:44:40,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-05-06 04:44:40,846 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 100 [2021-05-06 04:44:40,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:40,846 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-05-06 04:44:40,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:44:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-05-06 04:44:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-06 04:44:40,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:40,847 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:41,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 04:44:41,052 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:41,052 INFO L82 PathProgramCache]: Analyzing trace with hash -65749816, now seen corresponding path program 11 times [2021-05-06 04:44:41,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:41,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291553183] [2021-05-06 04:44:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:41,058 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:41,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20068798] [2021-05-06 04:44:41,058 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 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 04:44:41,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 04:44:41,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:41,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 04:44:41,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:41,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 24 proven. 264 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 04:44:41,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:41,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291553183] [2021-05-06 04:44:41,704 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:41,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20068798] [2021-05-06 04:44:41,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20068798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:41,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:41,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 04:44:41,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422415972] [2021-05-06 04:44:41,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 04:44:41,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:41,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 04:44:41,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:44:41,705 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:44:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:41,949 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2021-05-06 04:44:41,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 04:44:41,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 106 [2021-05-06 04:44:41,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:41,950 INFO L225 Difference]: With dead ends: 116 [2021-05-06 04:44:41,950 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 04:44:41,950 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-05-06 04:44:41,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 04:44:41,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 04:44:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:44:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-05-06 04:44:41,955 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 106 [2021-05-06 04:44:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:41,955 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-05-06 04:44:41,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:44:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-05-06 04:44:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 04:44:41,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:41,956 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:42,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 04:44:42,156 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:42,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:42,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1935565549, now seen corresponding path program 12 times [2021-05-06 04:44:42,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:42,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739382494] [2021-05-06 04:44:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:42,160 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:42,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097231179] [2021-05-06 04:44:42,161 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 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 04:44:42,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 04:44:42,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:42,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 04:44:42,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:42,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:42,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:42,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739382494] [2021-05-06 04:44:42,554 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:42,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097231179] [2021-05-06 04:44:42,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097231179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:42,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:42,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 04:44:42,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739333614] [2021-05-06 04:44:42,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 04:44:42,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:42,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 04:44:42,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:42,555 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:44:42,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:42,712 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2021-05-06 04:44:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 04:44:42,712 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 108 [2021-05-06 04:44:42,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:42,713 INFO L225 Difference]: With dead ends: 122 [2021-05-06 04:44:42,713 INFO L226 Difference]: Without dead ends: 117 [2021-05-06 04:44:42,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-06 04:44:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-06 04:44:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-06 04:44:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:44:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-05-06 04:44:42,719 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 108 [2021-05-06 04:44:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:42,719 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-05-06 04:44:42,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:44:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-05-06 04:44:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 04:44:42,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:42,720 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:42,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 04:44:42,929 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1170284597, now seen corresponding path program 12 times [2021-05-06 04:44:42,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:42,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084152432] [2021-05-06 04:44:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:42,936 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:42,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668116441] [2021-05-06 04:44:42,936 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 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 04:44:43,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 04:44:43,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:43,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 04:44:43,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:43,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 26 proven. 312 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 04:44:43,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:43,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084152432] [2021-05-06 04:44:43,895 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:43,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668116441] [2021-05-06 04:44:43,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668116441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:43,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:43,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 04:44:43,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757359014] [2021-05-06 04:44:43,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 04:44:43,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:43,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 04:44:43,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:43,896 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:44:44,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:44,175 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2021-05-06 04:44:44,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 04:44:44,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 114 [2021-05-06 04:44:44,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:44,176 INFO L225 Difference]: With dead ends: 124 [2021-05-06 04:44:44,176 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 04:44:44,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:44:44,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 04:44:44,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-06 04:44:44,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:44:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-05-06 04:44:44,181 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2021-05-06 04:44:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:44,181 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-05-06 04:44:44,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:44:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-05-06 04:44:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 04:44:44,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:44,181 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:44,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-06 04:44:44,390 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:44,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:44,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1334563120, now seen corresponding path program 13 times [2021-05-06 04:44:44,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:44,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884983086] [2021-05-06 04:44:44,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:44,394 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:44,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729204701] [2021-05-06 04:44:44,394 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 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 04:44:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:44,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 04:44:44,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:44,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:44,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:44,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884983086] [2021-05-06 04:44:44,700 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:44,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729204701] [2021-05-06 04:44:44,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729204701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:44,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:44,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 04:44:44,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748825655] [2021-05-06 04:44:44,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 04:44:44,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:44,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 04:44:44,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:44:44,701 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:44:44,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:44,884 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2021-05-06 04:44:44,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 04:44:44,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 116 [2021-05-06 04:44:44,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:44,885 INFO L225 Difference]: With dead ends: 130 [2021-05-06 04:44:44,885 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 04:44:44,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-06 04:44:44,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 04:44:44,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-06 04:44:44,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:44:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-05-06 04:44:44,890 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 116 [2021-05-06 04:44:44,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:44,890 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-05-06 04:44:44,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:44:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-05-06 04:44:44,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 04:44:44,891 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:44,891 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:45,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:45,107 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:45,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:45,107 INFO L82 PathProgramCache]: Analyzing trace with hash -966570034, now seen corresponding path program 13 times [2021-05-06 04:44:45,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:45,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887261109] [2021-05-06 04:44:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:45,111 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:45,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860839522] [2021-05-06 04:44:45,111 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 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 04:44:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:45,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-06 04:44:45,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:45,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 28 proven. 364 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 04:44:45,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:45,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887261109] [2021-05-06 04:44:45,954 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:45,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860839522] [2021-05-06 04:44:45,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860839522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:45,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:45,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 04:44:45,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086603906] [2021-05-06 04:44:45,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 04:44:45,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:45,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 04:44:45,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-05-06 04:44:45,955 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:44:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:46,301 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2021-05-06 04:44:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 04:44:46,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 122 [2021-05-06 04:44:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:46,302 INFO L225 Difference]: With dead ends: 132 [2021-05-06 04:44:46,302 INFO L226 Difference]: Without dead ends: 127 [2021-05-06 04:44:46,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-05-06 04:44:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-06 04:44:46,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-06 04:44:46,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:44:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-05-06 04:44:46,307 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2021-05-06 04:44:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:46,308 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-05-06 04:44:46,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:44:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-05-06 04:44:46,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 04:44:46,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:46,309 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:46,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-06 04:44:46,515 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:46,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:46,515 INFO L82 PathProgramCache]: Analyzing trace with hash -464237453, now seen corresponding path program 14 times [2021-05-06 04:44:46,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:46,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639930884] [2021-05-06 04:44:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:46,519 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:46,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485833264] [2021-05-06 04:44:46,519 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 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 04:44:46,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:46,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:46,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 04:44:46,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:46,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:46,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:46,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639930884] [2021-05-06 04:44:46,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:46,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485833264] [2021-05-06 04:44:46,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485833264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:46,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:46,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 04:44:46,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153476991] [2021-05-06 04:44:46,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 04:44:46,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:46,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 04:44:46,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:46,859 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:44:47,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:47,049 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2021-05-06 04:44:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 04:44:47,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 124 [2021-05-06 04:44:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:47,050 INFO L225 Difference]: With dead ends: 138 [2021-05-06 04:44:47,050 INFO L226 Difference]: Without dead ends: 133 [2021-05-06 04:44:47,050 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-06 04:44:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-06 04:44:47,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-05-06 04:44:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:44:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-05-06 04:44:47,055 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 124 [2021-05-06 04:44:47,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:47,055 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-05-06 04:44:47,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:44:47,055 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-05-06 04:44:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 04:44:47,056 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:47,056 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:47,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 04:44:47,272 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:47,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:47,272 INFO L82 PathProgramCache]: Analyzing trace with hash 467995857, now seen corresponding path program 14 times [2021-05-06 04:44:47,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:47,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247028861] [2021-05-06 04:44:47,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:47,277 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:47,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100998194] [2021-05-06 04:44:47,277 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 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 04:44:47,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:47,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:47,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 04:44:47,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:48,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 30 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-06 04:44:48,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:48,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247028861] [2021-05-06 04:44:48,241 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:48,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100998194] [2021-05-06 04:44:48,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100998194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:48,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:48,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 04:44:48,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314122105] [2021-05-06 04:44:48,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 04:44:48,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:48,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 04:44:48,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:44:48,242 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:44:48,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:48,588 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2021-05-06 04:44:48,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 04:44:48,589 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 130 [2021-05-06 04:44:48,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:48,589 INFO L225 Difference]: With dead ends: 140 [2021-05-06 04:44:48,589 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 04:44:48,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:44:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 04:44:48,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-06 04:44:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:44:48,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-05-06 04:44:48,618 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 130 [2021-05-06 04:44:48,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:48,619 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-05-06 04:44:48,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:44:48,619 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-05-06 04:44:48,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 04:44:48,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:48,620 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:48,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 04:44:48,826 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:48,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:48,826 INFO L82 PathProgramCache]: Analyzing trace with hash -530918218, now seen corresponding path program 15 times [2021-05-06 04:44:48,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:48,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928541324] [2021-05-06 04:44:48,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:48,830 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:48,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051105989] [2021-05-06 04:44:48,831 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 04:44:49,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 04:44:49,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:49,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 04:44:49,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:49,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:49,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:49,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928541324] [2021-05-06 04:44:49,683 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:49,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051105989] [2021-05-06 04:44:49,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051105989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:49,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:49,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 04:44:49,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794947597] [2021-05-06 04:44:49,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 04:44:49,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:49,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 04:44:49,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 04:44:49,685 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:44:49,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:49,924 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2021-05-06 04:44:49,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 04:44:49,925 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 132 [2021-05-06 04:44:49,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:49,926 INFO L225 Difference]: With dead ends: 146 [2021-05-06 04:44:49,926 INFO L226 Difference]: Without dead ends: 141 [2021-05-06 04:44:49,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 04:44:49,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-06 04:44:49,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-06 04:44:49,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:44:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-05-06 04:44:49,931 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 132 [2021-05-06 04:44:49,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:49,931 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-05-06 04:44:49,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:44:49,931 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-05-06 04:44:49,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 04:44:49,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:49,932 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:50,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-06 04:44:50,137 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:50,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:50,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1557719340, now seen corresponding path program 15 times [2021-05-06 04:44:50,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:50,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969387521] [2021-05-06 04:44:50,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:50,145 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:50,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673312797] [2021-05-06 04:44:50,145 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 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 04:44:50,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 04:44:50,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:50,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-06 04:44:50,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:50,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 76 proven. 481 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-05-06 04:44:51,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:51,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969387521] [2021-05-06 04:44:51,309 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:51,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673312797] [2021-05-06 04:44:51,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673312797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:51,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:51,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 04:44:51,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232740408] [2021-05-06 04:44:51,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 04:44:51,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:51,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 04:44:51,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2021-05-06 04:44:51,311 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:44:51,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:51,798 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2021-05-06 04:44:51,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 04:44:51,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 138 [2021-05-06 04:44:51,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:51,799 INFO L225 Difference]: With dead ends: 148 [2021-05-06 04:44:51,799 INFO L226 Difference]: Without dead ends: 143 [2021-05-06 04:44:51,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-05-06 04:44:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-06 04:44:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-05-06 04:44:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 04:44:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2021-05-06 04:44:51,810 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 138 [2021-05-06 04:44:51,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:51,810 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2021-05-06 04:44:51,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:44:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2021-05-06 04:44:51,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-06 04:44:51,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:51,811 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:52,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-06 04:44:52,018 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:52,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1623037447, now seen corresponding path program 16 times [2021-05-06 04:44:52,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:52,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381877908] [2021-05-06 04:44:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:52,023 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:52,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775837091] [2021-05-06 04:44:52,023 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 04:44:52,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:52,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:52,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 04:44:52,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:52,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:53,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:53,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381877908] [2021-05-06 04:44:53,238 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:53,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775837091] [2021-05-06 04:44:53,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775837091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:53,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:53,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 04:44:53,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344238562] [2021-05-06 04:44:53,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 04:44:53,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:53,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 04:44:53,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:44:53,239 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:44:53,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:53,503 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2021-05-06 04:44:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 04:44:53,504 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 140 [2021-05-06 04:44:53,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:53,504 INFO L225 Difference]: With dead ends: 154 [2021-05-06 04:44:53,504 INFO L226 Difference]: Without dead ends: 149 [2021-05-06 04:44:53,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 04:44:53,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-06 04:44:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-06 04:44:53,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 04:44:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-05-06 04:44:53,510 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 140 [2021-05-06 04:44:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:53,510 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-05-06 04:44:53,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:44:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-05-06 04:44:53,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-06 04:44:53,511 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:53,511 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:53,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-06 04:44:53,716 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:53,716 INFO L82 PathProgramCache]: Analyzing trace with hash 831286743, now seen corresponding path program 16 times [2021-05-06 04:44:53,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:53,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278465750] [2021-05-06 04:44:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:53,721 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:53,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101915458] [2021-05-06 04:44:53,721 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 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 04:44:54,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:54,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:54,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 04:44:54,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:54,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 34 proven. 544 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-05-06 04:44:54,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:54,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278465750] [2021-05-06 04:44:54,878 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:54,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101915458] [2021-05-06 04:44:54,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101915458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:54,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:54,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 04:44:54,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545616485] [2021-05-06 04:44:54,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 04:44:54,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:54,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 04:44:54,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:44:54,879 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 04:44:55,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:55,291 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-05-06 04:44:55,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 04:44:55,291 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 146 [2021-05-06 04:44:55,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:55,292 INFO L225 Difference]: With dead ends: 156 [2021-05-06 04:44:55,292 INFO L226 Difference]: Without dead ends: 151 [2021-05-06 04:44:55,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2021-05-06 04:44:55,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-06 04:44:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-06 04:44:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 04:44:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-05-06 04:44:55,297 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2021-05-06 04:44:55,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:55,297 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-05-06 04:44:55,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 04:44:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-05-06 04:44:55,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-06 04:44:55,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:55,298 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:55,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-06 04:44:55,503 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:55,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:55,504 INFO L82 PathProgramCache]: Analyzing trace with hash 699272252, now seen corresponding path program 17 times [2021-05-06 04:44:55,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:55,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507542422] [2021-05-06 04:44:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:55,510 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:55,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917257128] [2021-05-06 04:44:55,511 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 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