/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_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:44:23,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:44:23,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:44:23,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:44:23,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:44:23,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:44:23,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:44:23,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:44:23,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:44:23,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:44:23,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:44:23,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:44:23,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:44:23,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:44:23,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:44:23,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:44:23,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:44:23,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:44:23,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:44:23,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:44:23,859 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 04:44:23,885 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:44:23,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:44:23,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:44:23,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:44:23,889 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:44:23,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:44:23,889 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:44:23,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:44:23,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:44:23,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:44:23,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:44:23,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:44:23,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:44:23,891 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:44:23,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:44:23,891 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:44:23,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:44:23,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:44:23,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:44:23,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:44:23,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:44:23,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:44:23,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:44:23,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:44:23,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:44:23,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:44:23,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:44:23,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:44:23,894 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:44:24,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:44:24,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:44:24,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:44:24,189 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:44:24,190 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:44:24,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound20.c [2021-05-06 04:44:24,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbe30f0e5/56d3dba62a24419c8363c9f7524c1fa5/FLAG5e84ea803 [2021-05-06 04:44:24,649 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:44:24,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound20.c [2021-05-06 04:44:24,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbe30f0e5/56d3dba62a24419c8363c9f7524c1fa5/FLAG5e84ea803 [2021-05-06 04:44:25,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbe30f0e5/56d3dba62a24419c8363c9f7524c1fa5 [2021-05-06 04:44:25,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:44:25,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:44:25,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:25,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:44:25,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:44:25,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a0abe1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25, skipping insertion in model container [2021-05-06 04:44:25,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:44:25,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:44:25,188 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_unwindbound20.c[458,471] [2021-05-06 04:44:25,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:25,209 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:44:25,220 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_unwindbound20.c[458,471] [2021-05-06 04:44:25,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:25,248 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:44:25,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25 WrapperNode [2021-05-06 04:44:25,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:25,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:44:25,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:44:25,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:44:25,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:44:25,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:44:25,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:44:25,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:44:25,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (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 04:44:25,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:44:25,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:44:25,379 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:44:25,379 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:44:25,379 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:44:25,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:44:25,380 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:44:25,380 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:44:25,380 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:44:25,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:44:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 04:44:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:44:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:44:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:44:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:44:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:44:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:44:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:44:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:44:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:44:25,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:44:25,548 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:44:25,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:25 BoogieIcfgContainer [2021-05-06 04:44:25,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:44:25,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:44:25,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:44:25,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:44:25,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:44:25" (1/3) ... [2021-05-06 04:44:25,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4261e612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:25, skipping insertion in model container [2021-05-06 04:44:25,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (2/3) ... [2021-05-06 04:44:25,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4261e612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:25, skipping insertion in model container [2021-05-06 04:44:25,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:25" (3/3) ... [2021-05-06 04:44:25,555 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound20.c [2021-05-06 04:44:25,576 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:44:25,579 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:44:25,591 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:44:25,632 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:44:25,632 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:44:25,633 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:44:25,638 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:44:25,638 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:44:25,638 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:44:25,638 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:44:25,638 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:44:25,661 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 04:44:25,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 04:44:25,664 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:25,665 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:25,665 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:25,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:25,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times [2021-05-06 04:44:25,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:25,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699513284] [2021-05-06 04:44:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:25,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:44:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:25,932 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 04:44:25,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:25,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699513284] [2021-05-06 04:44:25,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699513284] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:25,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:25,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:44:25,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873601366] [2021-05-06 04:44:25,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:44:25,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:25,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:44:25,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:25,953 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 04:44:26,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:26,043 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-05-06 04:44:26,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:44:26,045 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 04:44:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:26,050 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:44:26,050 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 04:44:26,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:26,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 04:44:26,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-06 04:44:26,088 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 04:44:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-06 04:44:26,091 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-06 04:44:26,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:26,092 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-06 04:44:26,092 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 04:44:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-06 04:44:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 04:44:26,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:26,094 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:26,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:44:26,094 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:26,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:26,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times [2021-05-06 04:44:26,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:26,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926187529] [2021-05-06 04:44:26,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:26,129 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:26,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088106142] [2021-05-06 04:44:26,130 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 04:44:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:26,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 04:44:26,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:26,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,299 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 04:44:26,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:26,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926187529] [2021-05-06 04:44:26,300 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:26,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088106142] [2021-05-06 04:44:26,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088106142] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:26,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:26,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 04:44:26,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412717947] [2021-05-06 04:44:26,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 04:44:26,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:26,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 04:44:26,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:44:26,303 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 04:44:26,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:26,314 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-06 04:44:26,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 04:44:26,314 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 04:44:26,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:26,315 INFO L225 Difference]: With dead ends: 28 [2021-05-06 04:44:26,315 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 04:44:26,316 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:44:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 04:44:26,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 04:44:26,320 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 04:44:26,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-06 04:44:26,320 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-06 04:44:26,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:26,321 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-06 04:44:26,321 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 04:44:26,321 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-06 04:44:26,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 04:44:26,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:26,322 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:26,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:44:26,535 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:26,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 1 times [2021-05-06 04:44:26,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:26,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246590193] [2021-05-06 04:44:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:26,553 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:26,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812620958] [2021-05-06 04:44:26,554 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 04:44:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:26,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:44:26,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:26,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,644 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 04:44:26,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:26,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246590193] [2021-05-06 04:44:26,644 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:26,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812620958] [2021-05-06 04:44:26,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812620958] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:26,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:26,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:44:26,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138311081] [2021-05-06 04:44:26,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:44:26,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:26,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:44:26,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:44:26,646 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 04:44:26,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:26,681 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-05-06 04:44:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:44:26,681 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 04:44:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:26,682 INFO L225 Difference]: With dead ends: 30 [2021-05-06 04:44:26,682 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 04:44:26,683 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 04:44:26,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 04:44:26,688 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 04:44:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 04:44:26,689 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-06 04:44:26,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:26,690 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 04:44:26,690 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 04:44:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 04:44:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 04:44:26,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:26,691 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 04:44:26,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:26,914 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 1 times [2021-05-06 04:44:26,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:26,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133243111] [2021-05-06 04:44:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:26,924 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:26,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355671674] [2021-05-06 04:44:26,924 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 04:44:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:26,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:44:26,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:26,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,048 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 04:44:27,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:27,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133243111] [2021-05-06 04:44:27,049 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:27,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355671674] [2021-05-06 04:44:27,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355671674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:27,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:27,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 04:44:27,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098062720] [2021-05-06 04:44:27,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:44:27,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:44:27,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:44:27,051 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 04:44:27,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:27,074 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-06 04:44:27,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:44:27,075 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 04:44:27,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:27,076 INFO L225 Difference]: With dead ends: 36 [2021-05-06 04:44:27,076 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 04:44:27,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:27,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 04:44:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 04:44:27,080 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 04:44:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 04:44:27,085 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-06 04:44:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:27,086 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 04:44:27,086 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 04:44:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 04:44:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 04:44:27,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:27,088 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:27,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:27,301 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash -261798320, now seen corresponding path program 1 times [2021-05-06 04:44:27,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:27,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811646865] [2021-05-06 04:44:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:27,309 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:27,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414037117] [2021-05-06 04:44:27,310 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 04:44:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:27,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:44:27,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:27,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,475 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 04:44:27,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:27,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811646865] [2021-05-06 04:44:27,476 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:27,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414037117] [2021-05-06 04:44:27,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414037117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:27,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:27,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:44:27,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557357665] [2021-05-06 04:44:27,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:44:27,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:27,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:44:27,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:27,480 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 04:44:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:27,536 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-06 04:44:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:44:27,537 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 04:44:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:27,537 INFO L225 Difference]: With dead ends: 38 [2021-05-06 04:44:27,538 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 04:44:27,538 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 04:44:27,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 04:44:27,543 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 04:44:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-06 04:44:27,544 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-06 04:44:27,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:27,545 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-06 04:44:27,545 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 04:44:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-06 04:44:27,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 04:44:27,546 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:27,546 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 04:44:27,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:27,761 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:27,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:27,761 INFO L82 PathProgramCache]: Analyzing trace with hash 891414954, now seen corresponding path program 1 times [2021-05-06 04:44:27,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:27,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061591280] [2021-05-06 04:44:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:27,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:27,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802796320] [2021-05-06 04:44:27,770 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 04:44:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:27,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 04:44:27,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:27,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,051 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 04:44:28,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:28,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061591280] [2021-05-06 04:44:28,052 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:28,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802796320] [2021-05-06 04:44:28,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802796320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:28,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:28,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:44:28,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763955512] [2021-05-06 04:44:28,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:44:28,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:28,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:44:28,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:28,055 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 04:44:28,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:28,143 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-06 04:44:28,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:28,143 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 04:44:28,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:28,144 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:44:28,144 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 04:44:28,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 04:44:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 04:44:28,157 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 04:44:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 04:44:28,157 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-06 04:44:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:28,158 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 04:44:28,158 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 04:44:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 04:44:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:44:28,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:28,159 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 04:44:28,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 04:44:28,384 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:28,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:28,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1647059121, now seen corresponding path program 2 times [2021-05-06 04:44:28,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:28,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515224734] [2021-05-06 04:44:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:28,393 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:28,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567188278] [2021-05-06 04:44:28,393 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 04:44:28,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:28,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:28,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 04:44:28,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:28,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,565 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 04:44:28,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:28,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515224734] [2021-05-06 04:44:28,565 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:28,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567188278] [2021-05-06 04:44:28,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567188278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:28,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:28,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:44:28,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250557737] [2021-05-06 04:44:28,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:44:28,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:28,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:44:28,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:28,567 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 04:44:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:28,616 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-06 04:44:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:44:28,617 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 04:44:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:28,617 INFO L225 Difference]: With dead ends: 44 [2021-05-06 04:44:28,617 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 04:44:28,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:44:28,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 04:44:28,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 04:44:28,622 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 04:44:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-06 04:44:28,622 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-05-06 04:44:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:28,623 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-06 04:44:28,623 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 04:44:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-06 04:44:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:44:28,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:28,623 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:28,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:28,849 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:28,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:28,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1645271661, now seen corresponding path program 2 times [2021-05-06 04:44:28,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:28,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646666484] [2021-05-06 04:44:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:28,856 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:28,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533955534] [2021-05-06 04:44:28,857 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 04:44:28,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:28,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:28,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 04:44:28,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:29,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,050 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 04:44:29,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:29,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646666484] [2021-05-06 04:44:29,050 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:29,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533955534] [2021-05-06 04:44:29,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533955534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:29,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:29,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:44:29,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91932967] [2021-05-06 04:44:29,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:44:29,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:29,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:44:29,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:29,052 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 04:44:29,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:29,156 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-05-06 04:44:29,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:29,157 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 04:44:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:29,158 INFO L225 Difference]: With dead ends: 46 [2021-05-06 04:44:29,158 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 04:44:29,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:29,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 04:44:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 04:44:29,163 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 04:44:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-06 04:44:29,163 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-05-06 04:44:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:29,164 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-06 04:44:29,164 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 04:44:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-06 04:44:29,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 04:44:29,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:29,165 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 04:44:29,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:29,388 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:29,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:29,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1036651181, now seen corresponding path program 2 times [2021-05-06 04:44:29,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:29,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993966392] [2021-05-06 04:44:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:29,395 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:29,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240895748] [2021-05-06 04:44:29,396 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 04:44:29,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:29,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:29,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 04:44:29,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:29,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,637 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 04:44:29,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:29,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993966392] [2021-05-06 04:44:29,637 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:29,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240895748] [2021-05-06 04:44:29,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240895748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:29,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:29,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:44:29,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531924812] [2021-05-06 04:44:29,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:44:29,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:29,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:44:29,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:29,639 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 04:44:29,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:29,830 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-05-06 04:44:29,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:44:29,830 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 04:44:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:29,831 INFO L225 Difference]: With dead ends: 49 [2021-05-06 04:44:29,831 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 04:44:29,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 04:44:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 04:44:29,836 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 04:44:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-06 04:44:29,836 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-06 04:44:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:29,837 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-06 04:44:29,837 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 04:44:29,837 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-06 04:44:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 04:44:29,838 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:29,838 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 04:44:30,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 04:44:30,059 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:30,060 INFO L82 PathProgramCache]: Analyzing trace with hash 486001554, now seen corresponding path program 3 times [2021-05-06 04:44:30,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:30,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73797995] [2021-05-06 04:44:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:30,067 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:30,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002685086] [2021-05-06 04:44:30,067 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 04:44:30,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:44:30,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:30,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:44:30,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:30,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,269 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 04:44:30,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:30,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73797995] [2021-05-06 04:44:30,270 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:30,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002685086] [2021-05-06 04:44:30,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002685086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:30,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:30,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:44:30,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029369963] [2021-05-06 04:44:30,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:30,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:30,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:30,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:30,273 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 04:44:30,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:30,338 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-06 04:44:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:44:30,339 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 04:44:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:30,341 INFO L225 Difference]: With dead ends: 52 [2021-05-06 04:44:30,341 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 04:44:30,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:30,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 04:44:30,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 04:44:30,348 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 04:44:30,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-06 04:44:30,352 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-05-06 04:44:30,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:30,353 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-06 04:44:30,353 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 04:44:30,353 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-06 04:44:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 04:44:30,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:30,357 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:30,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:30,581 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:30,581 INFO L82 PathProgramCache]: Analyzing trace with hash 487789014, now seen corresponding path program 3 times [2021-05-06 04:44:30,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:30,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652831626] [2021-05-06 04:44:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:30,587 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:30,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547743763] [2021-05-06 04:44:30,588 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 04:44:30,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 04:44:30,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:30,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 04:44:30,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:30,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,778 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 04:44:30,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:30,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652831626] [2021-05-06 04:44:30,778 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:30,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547743763] [2021-05-06 04:44:30,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547743763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:30,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:30,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:44:30,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460751472] [2021-05-06 04:44:30,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:30,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:30,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:30,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:30,780 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 04:44:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:30,832 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-06 04:44:30,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:44:30,833 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 04:44:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:30,833 INFO L225 Difference]: With dead ends: 50 [2021-05-06 04:44:30,834 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 04:44:30,834 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:30,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 04:44:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 04:44:30,839 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 04:44:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-06 04:44:30,839 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-05-06 04:44:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:30,840 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-06 04:44:30,840 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 04:44:30,840 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-06 04:44:30,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 04:44:30,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:30,840 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 04:44:31,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:31,048 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:31,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1383171920, now seen corresponding path program 3 times [2021-05-06 04:44:31,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:31,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283438391] [2021-05-06 04:44:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:31,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:31,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937667522] [2021-05-06 04:44:31,055 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 04:44:31,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:44:31,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:31,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 04:44:31,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:31,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,297 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 04:44:31,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:31,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283438391] [2021-05-06 04:44:31,297 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:31,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937667522] [2021-05-06 04:44:31,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937667522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:31,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:31,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:44:31,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090952296] [2021-05-06 04:44:31,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:44:31,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:31,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:44:31,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:31,299 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 04:44:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:31,382 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-06 04:44:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:31,382 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 04:44:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:31,383 INFO L225 Difference]: With dead ends: 52 [2021-05-06 04:44:31,383 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 04:44:31,383 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 04:44:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 04:44:31,388 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 04:44:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-06 04:44:31,389 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2021-05-06 04:44:31,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:31,389 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-06 04:44:31,389 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 04:44:31,389 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-06 04:44:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 04:44:31,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:31,390 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 04:44:31,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 04:44:31,604 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:31,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:31,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1386691371, now seen corresponding path program 4 times [2021-05-06 04:44:31,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:31,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935657237] [2021-05-06 04:44:31,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:31,611 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:31,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399606554] [2021-05-06 04:44:31,611 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 04:44:31,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:31,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:31,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 04:44:31,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:31,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,726 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 04:44:31,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,828 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 04:44:31,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:31,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935657237] [2021-05-06 04:44:31,829 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:31,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399606554] [2021-05-06 04:44:31,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399606554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:31,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:31,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:44:31,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320885900] [2021-05-06 04:44:31,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:44:31,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:31,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:44:31,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:44:31,830 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 04:44:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:31,895 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-05-06 04:44:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 04:44:31,896 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 04:44:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:31,896 INFO L225 Difference]: With dead ends: 58 [2021-05-06 04:44:31,896 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 04:44:31,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:31,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 04:44:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-06 04:44:31,902 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 04:44:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-06 04:44:31,902 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-05-06 04:44:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:31,902 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-06 04:44:31,902 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 04:44:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-06 04:44:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 04:44:31,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:31,903 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 04:44:32,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 04:44:32,126 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:32,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:32,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1037185971, now seen corresponding path program 4 times [2021-05-06 04:44:32,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:32,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804800596] [2021-05-06 04:44:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:32,132 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:32,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266051333] [2021-05-06 04:44:32,133 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 04:44:32,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:32,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:32,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 04:44:32,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:32,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,487 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 04:44:32,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:32,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804800596] [2021-05-06 04:44:32,487 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:32,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266051333] [2021-05-06 04:44:32,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266051333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:32,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:32,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:44:32,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158713726] [2021-05-06 04:44:32,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:44:32,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:32,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:44:32,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:32,489 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 04:44:32,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:32,593 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-05-06 04:44:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:44:32,594 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 04:44:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:32,594 INFO L225 Difference]: With dead ends: 60 [2021-05-06 04:44:32,594 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 04:44:32,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:32,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 04:44:32,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 04:44:32,601 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 04:44:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-06 04:44:32,601 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-06 04:44:32,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:32,602 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-06 04:44:32,602 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 04:44:32,602 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-06 04:44:32,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 04:44:32,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:32,602 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 04:44:32,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 04:44:32,809 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:32,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:32,809 INFO L82 PathProgramCache]: Analyzing trace with hash 999934744, now seen corresponding path program 5 times [2021-05-06 04:44:32,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:32,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823178028] [2021-05-06 04:44:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:32,814 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:32,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240766335] [2021-05-06 04:44:32,814 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 04:44:32,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 04:44:32,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:32,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 04:44:32,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:32,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,047 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 04:44:33,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:33,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823178028] [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 [1240766335] [2021-05-06 04:44:33,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240766335] 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 [9] total 9 [2021-05-06 04:44:33,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623376092] [2021-05-06 04:44:33,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 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 9 interpolants. [2021-05-06 04:44:33,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:33,048 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 04:44:33,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:33,133 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-05-06 04:44:33,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 04:44:33,134 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 04:44:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:33,135 INFO L225 Difference]: With dead ends: 66 [2021-05-06 04:44:33,135 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 04:44:33,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:33,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 04:44:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 04:44:33,141 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 04:44:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-06 04:44:33,141 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 52 [2021-05-06 04:44:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:33,142 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-06 04:44:33,142 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 04:44:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-06 04:44:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 04:44:33,143 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:33,143 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 04:44:33,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:33,357 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:33,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1795671114, now seen corresponding path program 5 times [2021-05-06 04:44:33,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:33,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271925591] [2021-05-06 04:44:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:33,363 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:33,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971060132] [2021-05-06 04:44:33,363 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 04:44:33,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 04:44:33,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:33,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 04:44:33,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:33,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,709 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 04:44:33,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:33,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271925591] [2021-05-06 04:44:33,710 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:33,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971060132] [2021-05-06 04:44:33,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971060132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:33,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:33,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:44:33,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495939612] [2021-05-06 04:44:33,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:44:33,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:33,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:44:33,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:33,711 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 04:44:33,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:33,826 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-05-06 04:44:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 04:44:33,826 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 04:44:33,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:33,827 INFO L225 Difference]: With dead ends: 68 [2021-05-06 04:44:33,827 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 04:44:33,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 04:44:33,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 04:44:33,832 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 04:44:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-05-06 04:44:33,833 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2021-05-06 04:44:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:33,833 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-05-06 04:44:33,833 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 04:44:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-05-06 04:44:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 04:44:33,834 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:33,834 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 04:44:34,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:34,041 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:34,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:34,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1633541723, now seen corresponding path program 6 times [2021-05-06 04:44:34,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:34,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644889069] [2021-05-06 04:44:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:34,045 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:34,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152342147] [2021-05-06 04:44:34,045 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 04:44:34,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 04:44:34,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:34,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 04:44:34,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:34,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,283 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 04:44:34,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:34,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644889069] [2021-05-06 04:44:34,283 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:34,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152342147] [2021-05-06 04:44:34,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152342147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:34,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:34,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:44:34,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084747993] [2021-05-06 04:44:34,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:44:34,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:34,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:44:34,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:34,284 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 04:44:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:34,389 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-05-06 04:44:34,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 04:44:34,389 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 04:44:34,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:34,390 INFO L225 Difference]: With dead ends: 74 [2021-05-06 04:44:34,390 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 04:44:34,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 04:44:34,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-06 04:44:34,396 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 04:44:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-06 04:44:34,396 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2021-05-06 04:44:34,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:34,396 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-06 04:44:34,396 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 04:44:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-06 04:44:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 04:44:34,397 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:34,397 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 04:44:34,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:34,617 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:34,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1180930233, now seen corresponding path program 6 times [2021-05-06 04:44:34,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:34,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621434587] [2021-05-06 04:44:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:34,624 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:34,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052925960] [2021-05-06 04:44:34,624 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 04:44:34,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 04:44:34,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:34,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 04:44:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:34,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,066 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 04:44:35,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:35,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621434587] [2021-05-06 04:44:35,066 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:35,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052925960] [2021-05-06 04:44:35,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052925960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:35,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:35,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 04:44:35,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751200568] [2021-05-06 04:44:35,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 04:44:35,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:35,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 04:44:35,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:35,068 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 04:44:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:35,219 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-05-06 04:44:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 04:44:35,219 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 04:44:35,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:35,220 INFO L225 Difference]: With dead ends: 76 [2021-05-06 04:44:35,220 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 04:44:35,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 04:44:35,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-06 04:44:35,226 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 04:44:35,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-05-06 04:44:35,226 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2021-05-06 04:44:35,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:35,227 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-05-06 04:44:35,227 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 04:44:35,227 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-05-06 04:44:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 04:44:35,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:35,227 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 04:44:35,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 04:44:35,452 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:35,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1699217054, now seen corresponding path program 7 times [2021-05-06 04:44:35,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:35,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925847758] [2021-05-06 04:44:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:35,457 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:35,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626642459] [2021-05-06 04:44:35,458 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 04:44:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:35,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 04:44:35,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:35,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,728 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 04:44:35,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:35,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925847758] [2021-05-06 04:44:35,728 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:35,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626642459] [2021-05-06 04:44:35,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626642459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:35,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:35,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:44:35,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419521851] [2021-05-06 04:44:35,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:44:35,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:44:35,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:35,730 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 04:44:35,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:35,843 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-05-06 04:44:35,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 04:44:35,844 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 04:44:35,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:35,845 INFO L225 Difference]: With dead ends: 82 [2021-05-06 04:44:35,845 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 04:44:35,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:35,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 04:44:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 04:44:35,857 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 04:44:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-06 04:44:35,858 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 68 [2021-05-06 04:44:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:35,859 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-06 04:44:35,859 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 04:44:35,859 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-06 04:44:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 04:44:35,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:35,859 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 04:44:36,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 04:44:36,077 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:36,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:36,077 INFO L82 PathProgramCache]: Analyzing trace with hash -763940164, now seen corresponding path program 7 times [2021-05-06 04:44:36,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:36,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765859853] [2021-05-06 04:44:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:36,083 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:36,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281141020] [2021-05-06 04:44:36,083 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 04:44:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:36,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 04:44:36,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:36,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,612 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 04:44:36,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:36,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765859853] [2021-05-06 04:44:36,613 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:36,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281141020] [2021-05-06 04:44:36,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281141020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:36,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:36,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 04:44:36,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751431517] [2021-05-06 04:44:36,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 04:44:36,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:36,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 04:44:36,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:36,614 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 04:44:36,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:36,790 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-05-06 04:44:36,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 04:44:36,791 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 04:44:36,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:36,791 INFO L225 Difference]: With dead ends: 84 [2021-05-06 04:44:36,791 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 04:44:36,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:44:36,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 04:44:36,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-06 04:44:36,797 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 04:44:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-05-06 04:44:36,797 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2021-05-06 04:44:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:36,798 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-05-06 04:44:36,798 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 04:44:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-05-06 04:44:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 04:44:36,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:36,798 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 04:44:37,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 04:44:37,005 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:37,005 INFO L82 PathProgramCache]: Analyzing trace with hash 989539297, now seen corresponding path program 8 times [2021-05-06 04:44:37,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:37,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839972607] [2021-05-06 04:44:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:37,010 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:37,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291056241] [2021-05-06 04:44:37,010 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 04:44:37,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:37,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:37,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 04:44:37,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:37,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,106 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 04:44:37,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,274 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 04:44:37,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:37,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839972607] [2021-05-06 04:44:37,275 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:37,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291056241] [2021-05-06 04:44:37,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291056241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:37,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:37,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 04:44:37,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382631975] [2021-05-06 04:44:37,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 04:44:37,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:37,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 04:44:37,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:37,276 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 04:44:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:37,406 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-05-06 04:44:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 04:44:37,407 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 04:44:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:37,407 INFO L225 Difference]: With dead ends: 90 [2021-05-06 04:44:37,407 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 04:44:37,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:44:37,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 04:44:37,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-06 04:44:37,413 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 04:44:37,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-06 04:44:37,413 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 76 [2021-05-06 04:44:37,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:37,414 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-06 04:44:37,414 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 04:44:37,414 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-06 04:44:37,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 04:44:37,414 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:37,414 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 04:44:37,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 04:44:37,629 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:37,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:37,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1500110401, now seen corresponding path program 8 times [2021-05-06 04:44:37,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:37,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361003537] [2021-05-06 04:44:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:37,634 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:37,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231334906] [2021-05-06 04:44:37,634 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 04:44:38,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:38,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:38,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 04:44:38,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:38,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,425 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 04:44:38,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:38,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361003537] [2021-05-06 04:44:38,426 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:38,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231334906] [2021-05-06 04:44:38,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231334906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:38,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:38,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 04:44:38,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190886597] [2021-05-06 04:44:38,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 04:44:38,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:38,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 04:44:38,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:38,428 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 04:44:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:38,632 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-05-06 04:44:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 04:44:38,632 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 04:44:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:38,633 INFO L225 Difference]: With dead ends: 92 [2021-05-06 04:44:38,633 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 04:44:38,633 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 04:44:38,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-06 04:44:38,639 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 04:44:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-05-06 04:44:38,639 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2021-05-06 04:44:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:38,640 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-05-06 04:44:38,640 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 04:44:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-05-06 04:44:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 04:44:38,640 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:38,641 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 04:44:38,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 04:44:38,846 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:38,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2095421916, now seen corresponding path program 9 times [2021-05-06 04:44:38,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:38,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465193609] [2021-05-06 04:44:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:38,855 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:38,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358648950] [2021-05-06 04:44:38,856 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 04:44:38,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 04:44:38,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:38,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 04:44:38,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:38,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,183 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 04:44:39,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:39,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465193609] [2021-05-06 04:44:39,184 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:39,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358648950] [2021-05-06 04:44:39,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358648950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:39,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:39,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 04:44:39,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577186414] [2021-05-06 04:44:39,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 04:44:39,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:39,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 04:44:39,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:39,185 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 04:44:39,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:39,323 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2021-05-06 04:44:39,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 04:44:39,324 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 04:44:39,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:39,324 INFO L225 Difference]: With dead ends: 98 [2021-05-06 04:44:39,325 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 04:44:39,325 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:44:39,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 04:44:39,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 04:44:39,330 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 04:44:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-06 04:44:39,331 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 84 [2021-05-06 04:44:39,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:39,331 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-06 04:44:39,331 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 04:44:39,331 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-06 04:44:39,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 04:44:39,332 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:39,332 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 04:44:39,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:39,537 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:39,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:39,538 INFO L82 PathProgramCache]: Analyzing trace with hash 488857026, now seen corresponding path program 9 times [2021-05-06 04:44:39,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:39,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935190961] [2021-05-06 04:44:39,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:39,544 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:39,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330793835] [2021-05-06 04:44:39,544 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 04:44:40,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 04:44:40,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 04:44:40,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:40,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,342 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 04:44:40,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:40,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935190961] [2021-05-06 04:44:40,343 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:40,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330793835] [2021-05-06 04:44:40,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330793835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:40,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:40,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 04:44:40,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548808559] [2021-05-06 04:44:40,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 04:44:40,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:40,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 04:44:40,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:44:40,344 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 04:44:40,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:40,572 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-05-06 04:44:40,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 04:44:40,572 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 04:44:40,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:40,573 INFO L225 Difference]: With dead ends: 100 [2021-05-06 04:44:40,573 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 04:44:40,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:44:40,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 04:44:40,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-06 04:44:40,578 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 04:44:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-05-06 04:44:40,578 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2021-05-06 04:44:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:40,579 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-05-06 04:44:40,579 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 04:44:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-05-06 04:44:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 04:44:40,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:40,579 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 04:44:40,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 04:44:40,780 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:40,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1958171289, now seen corresponding path program 10 times [2021-05-06 04:44:40,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:40,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11629521] [2021-05-06 04:44:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:40,785 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:40,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871361369] [2021-05-06 04:44:40,785 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 04:44:41,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:41,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:41,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 04:44:41,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:41,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,497 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 04:44:41,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:41,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11629521] [2021-05-06 04:44:41,498 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:41,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871361369] [2021-05-06 04:44:41,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871361369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:41,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:41,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 04:44:41,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096182657] [2021-05-06 04:44:41,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 04:44:41,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:41,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 04:44:41,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:41,499 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 04:44:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:41,657 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2021-05-06 04:44:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 04:44:41,658 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 04:44:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:41,659 INFO L225 Difference]: With dead ends: 106 [2021-05-06 04:44:41,659 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 04:44:41,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-06 04:44:41,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 04:44:41,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 04:44:41,665 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 04:44:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-06 04:44:41,666 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 92 [2021-05-06 04:44:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:41,666 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-06 04:44:41,666 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 04:44:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-06 04:44:41,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 04:44:41,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:41,667 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 04:44:41,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:41,872 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:41,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:41,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2105665221, now seen corresponding path program 10 times [2021-05-06 04:44:41,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:41,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987232895] [2021-05-06 04:44:41,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:41,880 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:41,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951647060] [2021-05-06 04:44:41,880 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 04:44:42,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:42,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:42,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-06 04:44:42,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:42,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,981 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 04:44:42,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:42,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987232895] [2021-05-06 04:44:42,982 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:42,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951647060] [2021-05-06 04:44:42,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951647060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:42,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:42,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 04:44:42,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916643176] [2021-05-06 04:44:42,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 04:44:42,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:42,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 04:44:42,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:42,987 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 04:44:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:43,271 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-05-06 04:44:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 04:44:43,272 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 04:44:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:43,272 INFO L225 Difference]: With dead ends: 108 [2021-05-06 04:44:43,272 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 04:44:43,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 04:44:43,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 04:44:43,278 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 04:44:43,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-05-06 04:44:43,279 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2021-05-06 04:44:43,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:43,279 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-05-06 04:44:43,279 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 04:44:43,279 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-05-06 04:44:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 04:44:43,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:43,280 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 04:44:43,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 04:44:43,486 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:43,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:43,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1311310250, now seen corresponding path program 11 times [2021-05-06 04:44:43,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:43,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546934681] [2021-05-06 04:44:43,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:43,492 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:43,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306043075] [2021-05-06 04:44:43,493 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 04:44:43,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 04:44:43,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:43,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 04:44:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:43,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,138 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 04:44:44,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:44,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546934681] [2021-05-06 04:44:44,138 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:44,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306043075] [2021-05-06 04:44:44,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306043075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:44,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:44,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 04:44:44,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203829578] [2021-05-06 04:44:44,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 04:44:44,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:44,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 04:44:44,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:44:44,139 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 04:44:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:44,306 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2021-05-06 04:44:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 04:44:44,306 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 04:44:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:44,307 INFO L225 Difference]: With dead ends: 114 [2021-05-06 04:44:44,307 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 04:44:44,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-06 04:44:44,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 04:44:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-06 04:44:44,314 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 04:44:44,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-05-06 04:44:44,315 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 100 [2021-05-06 04:44:44,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:44,315 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-05-06 04:44:44,315 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 04:44:44,315 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-05-06 04:44:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-06 04:44:44,316 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:44,316 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 04:44:44,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 04:44:44,523 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:44,523 INFO L82 PathProgramCache]: Analyzing trace with hash -65749816, now seen corresponding path program 11 times [2021-05-06 04:44:44,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:44,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093928810] [2021-05-06 04:44:44,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:44,531 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:44,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561886977] [2021-05-06 04:44:44,531 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 04:44:45,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 04:44:45,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:45,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 04:44:45,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:45,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,295 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 04:44:45,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:45,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093928810] [2021-05-06 04:44:45,296 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:45,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561886977] [2021-05-06 04:44:45,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561886977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:45,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:45,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 04:44:45,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144963389] [2021-05-06 04:44:45,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 04:44:45,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:45,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 04:44:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:44:45,297 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 04:44:45,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:45,583 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2021-05-06 04:44:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 04:44:45,583 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 04:44:45,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:45,584 INFO L225 Difference]: With dead ends: 116 [2021-05-06 04:44:45,584 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 04:44:45,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-05-06 04:44:45,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 04:44:45,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 04:44:45,590 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 04:44:45,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-05-06 04:44:45,591 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 106 [2021-05-06 04:44:45,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:45,591 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-05-06 04:44:45,591 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 04:44:45,591 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-05-06 04:44:45,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 04:44:45,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:45,592 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 04:44:45,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 04:44:45,798 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:45,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:45,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1935565549, now seen corresponding path program 12 times [2021-05-06 04:44:45,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:45,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876511952] [2021-05-06 04:44:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:45,803 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:45,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017683894] [2021-05-06 04:44:45,803 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 04:44:45,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 04:44:45,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:45,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 04:44:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:46,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,268 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 04:44:46,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:46,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876511952] [2021-05-06 04:44:46,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:46,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017683894] [2021-05-06 04:44:46,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017683894] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:46,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:46,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 04:44:46,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60292699] [2021-05-06 04:44:46,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 04:44:46,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:46,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 04:44:46,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:46,270 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 04:44:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:46,460 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2021-05-06 04:44:46,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 04:44:46,460 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 04:44:46,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:46,461 INFO L225 Difference]: With dead ends: 122 [2021-05-06 04:44:46,461 INFO L226 Difference]: Without dead ends: 117 [2021-05-06 04:44:46,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-06 04:44:46,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-06 04:44:46,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-06 04:44:46,468 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 04:44:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-05-06 04:44:46,468 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 108 [2021-05-06 04:44:46,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:46,468 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-05-06 04:44:46,469 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 04:44:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-05-06 04:44:46,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 04:44:46,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:46,469 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 04:44:46,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 04:44:46,673 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:46,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:46,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1170284597, now seen corresponding path program 12 times [2021-05-06 04:44:46,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:46,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656829499] [2021-05-06 04:44:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:46,683 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:46,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168288907] [2021-05-06 04:44:46,683 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 04:44:47,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 04:44:47,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:47,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 04:44:47,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:47,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,767 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 04:44:47,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:47,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656829499] [2021-05-06 04:44:47,767 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:47,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168288907] [2021-05-06 04:44:47,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168288907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:47,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:47,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 04:44:47,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917388219] [2021-05-06 04:44:47,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 04:44:47,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:47,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 04:44:47,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:47,768 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 04:44:48,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:48,095 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2021-05-06 04:44:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 04:44:48,096 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 04:44:48,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:48,097 INFO L225 Difference]: With dead ends: 124 [2021-05-06 04:44:48,097 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 04:44:48,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:44:48,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 04:44:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-06 04:44:48,104 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 04:44:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-05-06 04:44:48,104 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2021-05-06 04:44:48,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:48,105 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-05-06 04:44:48,105 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 04:44:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-05-06 04:44:48,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 04:44:48,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:48,105 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 04:44:48,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-06 04:44:48,306 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:48,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1334563120, now seen corresponding path program 13 times [2021-05-06 04:44:48,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:48,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808480428] [2021-05-06 04:44:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:48,311 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:48,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936109941] [2021-05-06 04:44:48,311 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 04:44:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:48,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 04:44:48,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:48,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,663 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 04:44:48,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:48,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808480428] [2021-05-06 04:44:48,664 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:48,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936109941] [2021-05-06 04:44:48,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936109941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:48,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:48,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 04:44:48,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205247837] [2021-05-06 04:44:48,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 04:44:48,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:48,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 04:44:48,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:44:48,665 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 04:44:48,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:48,892 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2021-05-06 04:44:48,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 04:44:48,892 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 04:44:48,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:48,893 INFO L225 Difference]: With dead ends: 130 [2021-05-06 04:44:48,893 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 04:44:48,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-06 04:44:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 04:44:48,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-06 04:44:48,900 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 04:44:48,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-05-06 04:44:48,900 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 116 [2021-05-06 04:44:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:48,901 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-05-06 04:44:48,901 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 04:44:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-05-06 04:44:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 04:44:48,901 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:48,901 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 04:44:49,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:49,117 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:49,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:49,117 INFO L82 PathProgramCache]: Analyzing trace with hash -966570034, now seen corresponding path program 13 times [2021-05-06 04:44:49,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:49,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245917588] [2021-05-06 04:44:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:49,122 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:49,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156421071] [2021-05-06 04:44:49,123 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 04:44:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-06 04:44:49,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:50,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,082 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 04:44:50,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:50,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245917588] [2021-05-06 04:44:50,082 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:50,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156421071] [2021-05-06 04:44:50,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156421071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:50,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:50,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 04:44:50,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490076450] [2021-05-06 04:44:50,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 04:44:50,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:50,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 04:44:50,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-05-06 04:44:50,083 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 04:44:50,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:50,420 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2021-05-06 04:44:50,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 04:44:50,420 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 04:44:50,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:50,421 INFO L225 Difference]: With dead ends: 132 [2021-05-06 04:44:50,421 INFO L226 Difference]: Without dead ends: 127 [2021-05-06 04:44:50,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-05-06 04:44:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-06 04:44:50,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-06 04:44:50,429 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 04:44:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-05-06 04:44:50,429 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2021-05-06 04:44:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:50,430 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-05-06 04:44:50,431 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 04:44:50,431 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-05-06 04:44:50,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 04:44:50,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:50,431 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 04:44:50,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-06 04:44:50,637 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:50,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:50,638 INFO L82 PathProgramCache]: Analyzing trace with hash -464237453, now seen corresponding path program 14 times [2021-05-06 04:44:50,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:50,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782950548] [2021-05-06 04:44:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:50,643 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:50,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231466522] [2021-05-06 04:44:50,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:44:50,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:50,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:50,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 04:44:50,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:50,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,977 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 04:44:51,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,070 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 04:44:51,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:51,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782950548] [2021-05-06 04:44:51,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:51,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231466522] [2021-05-06 04:44:51,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231466522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:51,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:51,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 04:44:51,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419263066] [2021-05-06 04:44:51,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 04:44:51,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:51,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 04:44:51,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:51,073 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 04:44:51,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:51,292 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2021-05-06 04:44:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 04:44:51,292 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 04:44:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:51,293 INFO L225 Difference]: With dead ends: 138 [2021-05-06 04:44:51,293 INFO L226 Difference]: Without dead ends: 133 [2021-05-06 04:44:51,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-06 04:44:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-06 04:44:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-05-06 04:44:51,301 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 04:44:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-05-06 04:44:51,301 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 124 [2021-05-06 04:44:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:51,302 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-05-06 04:44:51,302 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 04:44:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-05-06 04:44:51,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 04:44:51,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:51,303 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 04:44:51,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 04:44:51,526 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:51,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:51,526 INFO L82 PathProgramCache]: Analyzing trace with hash 467995857, now seen corresponding path program 14 times [2021-05-06 04:44:51,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:51,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401036605] [2021-05-06 04:44:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:51,532 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:51,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278985866] [2021-05-06 04:44:51,532 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 04:44:52,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:52,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:52,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 04:44:52,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:52,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,616 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 04:44:52,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:52,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401036605] [2021-05-06 04:44:52,616 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:52,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278985866] [2021-05-06 04:44:52,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278985866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:52,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:52,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 04:44:52,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95579853] [2021-05-06 04:44:52,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 04:44:52,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:52,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 04:44:52,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:44:52,618 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 04:44:52,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:52,980 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2021-05-06 04:44:52,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 04:44:52,981 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 04:44:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:52,981 INFO L225 Difference]: With dead ends: 140 [2021-05-06 04:44:52,981 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 04:44:52,982 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:44:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 04:44:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-06 04:44:52,988 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 04:44:52,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-05-06 04:44:52,989 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 130 [2021-05-06 04:44:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:52,989 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-05-06 04:44:52,989 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 04:44:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-05-06 04:44:52,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 04:44:52,990 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:52,990 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 04:44:53,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 04:44:53,196 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:53,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:53,197 INFO L82 PathProgramCache]: Analyzing trace with hash -530918218, now seen corresponding path program 15 times [2021-05-06 04:44:53,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:53,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678283045] [2021-05-06 04:44:53,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:53,204 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:53,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029962474] [2021-05-06 04:44:53,205 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 04:44:53,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 04:44:53,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:53,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 04:44:53,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:53,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,216 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 04:44:54,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:54,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678283045] [2021-05-06 04:44:54,217 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:54,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029962474] [2021-05-06 04:44:54,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029962474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:54,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:54,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 04:44:54,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560378250] [2021-05-06 04:44:54,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 04:44:54,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:54,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 04:44:54,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 04:44:54,219 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 04:44:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:54,506 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2021-05-06 04:44:54,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 04:44:54,507 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 04:44:54,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:54,508 INFO L225 Difference]: With dead ends: 146 [2021-05-06 04:44:54,508 INFO L226 Difference]: Without dead ends: 141 [2021-05-06 04:44:54,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 04:44:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-06 04:44:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-06 04:44:54,515 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 04:44:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-05-06 04:44:54,516 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 132 [2021-05-06 04:44:54,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:54,516 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-05-06 04:44:54,516 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 04:44:54,517 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-05-06 04:44:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 04:44:54,517 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:54,517 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 04:44:54,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-06 04:44:54,723 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:54,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:54,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1557719340, now seen corresponding path program 15 times [2021-05-06 04:44:54,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:54,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811460713] [2021-05-06 04:44:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:54,730 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:54,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209999837] [2021-05-06 04:44:54,730 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 04:44:55,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 04:44:55,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:55,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-06 04:44:55,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:55,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,057 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 04:44:56,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:56,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811460713] [2021-05-06 04:44:56,058 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:56,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209999837] [2021-05-06 04:44:56,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209999837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:56,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:56,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 04:44:56,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345970168] [2021-05-06 04:44:56,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 04:44:56,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:56,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 04:44:56,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2021-05-06 04:44:56,059 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 04:44:56,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:56,576 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2021-05-06 04:44:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 04:44:56,577 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 04:44:56,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:56,578 INFO L225 Difference]: With dead ends: 148 [2021-05-06 04:44:56,578 INFO L226 Difference]: Without dead ends: 143 [2021-05-06 04:44:56,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 318.5ms TimeCoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-05-06 04:44:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-06 04:44:56,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-05-06 04:44:56,586 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 04:44:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2021-05-06 04:44:56,587 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 138 [2021-05-06 04:44:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:56,587 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2021-05-06 04:44:56,587 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 04:44:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2021-05-06 04:44:56,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-06 04:44:56,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:56,588 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 04:44:56,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-06 04:44:56,796 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:56,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1623037447, now seen corresponding path program 16 times [2021-05-06 04:44:56,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:56,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239900092] [2021-05-06 04:44:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:56,802 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:56,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38588230] [2021-05-06 04:44:56,802 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 04:44:57,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:57,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:57,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 04:44:57,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:57,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:58,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:58,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:58,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:58,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:58,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:58,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:58,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:58,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:58,091 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 04:44:58,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:58,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239900092] [2021-05-06 04:44:58,091 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:58,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38588230] [2021-05-06 04:44:58,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38588230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:58,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:58,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 04:44:58,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467931841] [2021-05-06 04:44:58,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 04:44:58,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:58,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 04:44:58,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:44:58,093 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 04:44:58,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:58,363 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2021-05-06 04:44:58,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 04:44:58,363 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 04:44:58,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:58,364 INFO L225 Difference]: With dead ends: 154 [2021-05-06 04:44:58,364 INFO L226 Difference]: Without dead ends: 149 [2021-05-06 04:44:58,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 299.2ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 04:44:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-06 04:44:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-06 04:44:58,371 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 04:44:58,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-05-06 04:44:58,372 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 140 [2021-05-06 04:44:58,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:58,372 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-05-06 04:44:58,372 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 04:44:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-05-06 04:44:58,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-06 04:44:58,373 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:58,373 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 04:44:58,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-06 04:44:58,579 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:58,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:58,579 INFO L82 PathProgramCache]: Analyzing trace with hash 831286743, now seen corresponding path program 16 times [2021-05-06 04:44:58,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:58,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215087616] [2021-05-06 04:44:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:58,584 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:58,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167743121] [2021-05-06 04:44:58,585 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 04:44:59,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:59,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:59,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 04:44:59,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:59,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,774 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 04:44:59,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:59,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215087616] [2021-05-06 04:44:59,774 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:59,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167743121] [2021-05-06 04:44:59,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167743121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:59,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:59,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 04:44:59,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525982331] [2021-05-06 04:44:59,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 04:44:59,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:59,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 04:44:59,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:44:59,775 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 04:45:00,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:00,196 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-05-06 04:45:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 04:45:00,198 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 04:45:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:00,199 INFO L225 Difference]: With dead ends: 156 [2021-05-06 04:45:00,199 INFO L226 Difference]: Without dead ends: 151 [2021-05-06 04:45:00,199 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2021-05-06 04:45:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-06 04:45:00,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-06 04:45:00,206 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 04:45:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-05-06 04:45:00,207 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2021-05-06 04:45:00,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:00,207 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-05-06 04:45:00,208 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 04:45:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-05-06 04:45:00,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-06 04:45:00,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:00,208 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 04:45:00,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-06 04:45:00,414 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:00,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:00,415 INFO L82 PathProgramCache]: Analyzing trace with hash 699272252, now seen corresponding path program 17 times [2021-05-06 04:45:00,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:00,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810129121] [2021-05-06 04:45:00,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:00,419 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:00,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514562699] [2021-05-06 04:45:00,420 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