/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/prod4br-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:14:25,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:14:25,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:14:25,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:14:25,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:14:25,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:14:25,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:14:25,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:14:25,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:14:25,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:14:25,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:14:25,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:14:25,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:14:25,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:14:25,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:14:25,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:14:25,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:14:25,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:14:25,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:14:25,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:14:25,550 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 [2021-05-02 16:14:25,577 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:14:25,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:14:25,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:14:25,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:14:25,579 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:14:25,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:14:25,579 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:14:25,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:14:25,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:14:25,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:14:25,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:14:25,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:14:25,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:14:25,591 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:14:25,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:14:25,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:14:25,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:14:25,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:14:25,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:14:25,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:14:25,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:14:25,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:14:25,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:14:25,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:14:25,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:14:25,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:14:25,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:14:25,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:14:25,592 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:14:25,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:14:25,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:14:25,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:14:25,842 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:14:25,843 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:14:25,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2021-05-02 16:14:25,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64576ba4d/b9bc8bba45c4479e9ec067f7701cbbc0/FLAGa1380c2fc [2021-05-02 16:14:26,251 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:14:26,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2021-05-02 16:14:26,257 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64576ba4d/b9bc8bba45c4479e9ec067f7701cbbc0/FLAGa1380c2fc [2021-05-02 16:14:26,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64576ba4d/b9bc8bba45c4479e9ec067f7701cbbc0 [2021-05-02 16:14:26,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:14:26,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:14:26,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:14:26,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:14:26,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:14:26,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e94669c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26, skipping insertion in model container [2021-05-02 16:14:26,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:14:26,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:14:26,381 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/prod4br-ll_unwindbound100.c[524,537] [2021-05-02 16:14:26,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:14:26,402 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:14:26,435 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/prod4br-ll_unwindbound100.c[524,537] [2021-05-02 16:14:26,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:14:26,478 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:14:26,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26 WrapperNode [2021-05-02 16:14:26,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:14:26,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:14:26,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:14:26,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:14:26,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:14:26,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:14:26,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:14:26,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:14:26,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (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 [2021-05-02 16:14:26,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:14:26,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:14:26,576 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:14:26,577 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:14:26,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:14:26,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:14:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:14:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:14:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:14:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:14:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 16:14:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:14:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:14:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:14:26,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:14:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:14:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:14:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:14:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:14:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:14:26,854 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:14:26,854 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:14:26,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:14:26 BoogieIcfgContainer [2021-05-02 16:14:26,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:14:26,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:14:26,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:14:26,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:14:26,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:14:26" (1/3) ... [2021-05-02 16:14:26,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ef3361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:14:26, skipping insertion in model container [2021-05-02 16:14:26,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (2/3) ... [2021-05-02 16:14:26,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ef3361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:14:26, skipping insertion in model container [2021-05-02 16:14:26,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:14:26" (3/3) ... [2021-05-02 16:14:26,867 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound100.c [2021-05-02 16:14:26,871 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:14:26,874 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:14:26,884 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:14:26,898 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:14:26,898 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:14:26,899 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:14:26,899 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:14:26,899 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:14:26,899 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:14:26,899 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:14:26,899 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:14:26,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:14:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 16:14:26,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:26,913 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:26,914 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:26,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:26,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1717894843, now seen corresponding path program 1 times [2021-05-02 16:14:26,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:26,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137413821] [2021-05-02 16:14:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:27,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:14:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:27,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:14:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:27,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:27,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137413821] [2021-05-02 16:14:27,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137413821] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:14:27,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:14:27,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:14:27,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741735401] [2021-05-02 16:14:27,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:14:27,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:27,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:14:27,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:14:27,178 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:14:27,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:27,295 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2021-05-02 16:14:27,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:14:27,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 16:14:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:27,304 INFO L225 Difference]: With dead ends: 56 [2021-05-02 16:14:27,304 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 16:14:27,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:14:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 16:14:27,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 16:14:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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) [2021-05-02 16:14:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-02 16:14:27,340 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-05-02 16:14:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:27,340 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-02 16:14:27,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:14:27,341 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-02 16:14:27,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 16:14:27,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:27,342 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:27,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:14:27,343 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:27,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:27,343 INFO L82 PathProgramCache]: Analyzing trace with hash 444281082, now seen corresponding path program 1 times [2021-05-02 16:14:27,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:27,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099860812] [2021-05-02 16:14:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:27,375 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:27,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581304638] [2021-05-02 16:14:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 16:14:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:27,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:14:27,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:27,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:27,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:27,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:27,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:27,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:27,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:27,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099860812] [2021-05-02 16:14:27,570 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:27,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581304638] [2021-05-02 16:14:27,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581304638] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:14:27,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:14:27,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:14:27,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966543473] [2021-05-02 16:14:27,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:14:27,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:27,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:14:27,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:14:27,572 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:14:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:27,583 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-02 16:14:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:14:27,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 16:14:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:27,584 INFO L225 Difference]: With dead ends: 37 [2021-05-02 16:14:27,584 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 16:14:27,585 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:14:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 16:14:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 16:14:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 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) [2021-05-02 16:14:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 16:14:27,589 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-05-02 16:14:27,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:27,589 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 16:14:27,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:14:27,589 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 16:14:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 16:14:27,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:27,590 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:27,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:14:27,805 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:27,805 INFO L82 PathProgramCache]: Analyzing trace with hash 446068542, now seen corresponding path program 1 times [2021-05-02 16:14:27,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:27,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579179103] [2021-05-02 16:14:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:27,813 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:27,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027630505] [2021-05-02 16:14:27,813 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 [2021-05-02 16:14:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:27,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 16:14:27,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:27,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:27,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:28,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:28,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579179103] [2021-05-02 16:14:28,038 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:28,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027630505] [2021-05-02 16:14:28,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027630505] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:14:28,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:14:28,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 16:14:28,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943961396] [2021-05-02 16:14:28,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:14:28,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:28,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:14:28,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:14:28,040 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:14:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:28,191 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-05-02 16:14:28,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:14:28,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 16:14:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:28,192 INFO L225 Difference]: With dead ends: 42 [2021-05-02 16:14:28,192 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 16:14:28,193 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:14:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 16:14:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-05-02 16:14:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:14:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-02 16:14:28,203 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2021-05-02 16:14:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:28,204 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-02 16:14:28,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:14:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-02 16:14:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 16:14:28,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:28,204 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:28,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:28,413 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:28,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1308579644, now seen corresponding path program 1 times [2021-05-02 16:14:28,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:28,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030315008] [2021-05-02 16:14:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:28,421 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:28,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645862504] [2021-05-02 16:14:28,421 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 [2021-05-02 16:14:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:14:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:28,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:28,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:28,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030315008] [2021-05-02 16:14:28,826 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:28,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645862504] [2021-05-02 16:14:28,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645862504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:28,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:28,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:14:28,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115475844] [2021-05-02 16:14:28,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:14:28,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:28,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:14:28,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:14:28,827 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:29,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:29,089 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2021-05-02 16:14:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:14:29,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 16:14:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:29,090 INFO L225 Difference]: With dead ends: 51 [2021-05-02 16:14:29,091 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 16:14:29,091 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:14:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 16:14:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 16:14:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:14:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-02 16:14:29,096 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 24 [2021-05-02 16:14:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:29,096 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-02 16:14:29,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-02 16:14:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 16:14:29,097 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:29,097 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:29,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:29,313 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:29,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:29,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1797927234, now seen corresponding path program 1 times [2021-05-02 16:14:29,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:29,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807549479] [2021-05-02 16:14:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:29,320 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:29,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035754588] [2021-05-02 16:14:29,320 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 [2021-05-02 16:14:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:29,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:14:29,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:29,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:29,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:29,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807549479] [2021-05-02 16:14:29,413 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:29,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035754588] [2021-05-02 16:14:29,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035754588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:29,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:29,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:14:29,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947072674] [2021-05-02 16:14:29,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:14:29,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:29,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:14:29,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:14:29,414 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:14:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:29,436 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-02 16:14:29,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:14:29,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-05-02 16:14:29,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:29,437 INFO L225 Difference]: With dead ends: 56 [2021-05-02 16:14:29,437 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 16:14:29,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:14:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 16:14:29,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 16:14:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 36 states have internal predecessors, (47), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:14:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-05-02 16:14:29,442 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 27 [2021-05-02 16:14:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:29,442 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-05-02 16:14:29,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:14:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-05-02 16:14:29,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 16:14:29,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:29,443 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:29,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:29,658 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:29,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:29,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1799714694, now seen corresponding path program 1 times [2021-05-02 16:14:29,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:29,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412286650] [2021-05-02 16:14:29,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:29,665 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:29,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942573294] [2021-05-02 16:14:29,665 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 [2021-05-02 16:14:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:29,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 16:14:29,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:29,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:29,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:29,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412286650] [2021-05-02 16:14:29,964 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:29,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942573294] [2021-05-02 16:14:29,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942573294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:29,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:29,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:14:29,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852618730] [2021-05-02 16:14:29,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:14:29,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:29,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:14:29,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:14:29,966 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:34,422 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2021-05-02 16:14:34,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:14:34,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 16:14:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:34,423 INFO L225 Difference]: With dead ends: 63 [2021-05-02 16:14:34,423 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 16:14:34,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:14:34,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 16:14:34,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-02 16:14:34,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.3) internal successors, (52), 42 states have internal predecessors, (52), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:14:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 16:14:34,428 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2021-05-02 16:14:34,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:34,429 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 16:14:34,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:34,429 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 16:14:34,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:14:34,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:34,429 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:34,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:34,630 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:34,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:34,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1357155568, now seen corresponding path program 1 times [2021-05-02 16:14:34,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:34,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207623173] [2021-05-02 16:14:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:34,636 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:34,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160427444] [2021-05-02 16:14:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:34,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 16:14:34,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:34,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:34,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:34,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:34,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:34,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:34,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207623173] [2021-05-02 16:14:34,844 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:34,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160427444] [2021-05-02 16:14:34,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160427444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:34,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:34,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:14:34,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426065030] [2021-05-02 16:14:34,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:14:34,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:34,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:14:34,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:14:34,846 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:39,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:39,303 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2021-05-02 16:14:39,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:14:39,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 16:14:39,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:39,304 INFO L225 Difference]: With dead ends: 79 [2021-05-02 16:14:39,304 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 16:14:39,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:14:39,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 16:14:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 16:14:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:14:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2021-05-02 16:14:39,311 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 28 [2021-05-02 16:14:39,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:39,311 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2021-05-02 16:14:39,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2021-05-02 16:14:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 16:14:39,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:39,312 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:39,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:39,525 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:39,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:39,525 INFO L82 PathProgramCache]: Analyzing trace with hash -293334773, now seen corresponding path program 1 times [2021-05-02 16:14:39,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:39,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615808660] [2021-05-02 16:14:39,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:39,531 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:39,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940021655] [2021-05-02 16:14:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:39,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 16:14:39,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:39,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:39,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:39,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:39,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:39,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:39,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615808660] [2021-05-02 16:14:39,738 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:39,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940021655] [2021-05-02 16:14:39,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940021655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:39,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:39,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:14:39,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860579115] [2021-05-02 16:14:39,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:14:39,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:39,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:14:39,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:14:39,739 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:44,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:44,078 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2021-05-02 16:14:44,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:14:44,079 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 16:14:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:44,079 INFO L225 Difference]: With dead ends: 92 [2021-05-02 16:14:44,080 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 16:14:44,080 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:14:44,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 16:14:44,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-05-02 16:14:44,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:14:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-05-02 16:14:44,086 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 29 [2021-05-02 16:14:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:44,086 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-05-02 16:14:44,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:44,086 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-05-02 16:14:44,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 16:14:44,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:44,087 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:44,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:44,305 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:44,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:44,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1481672589, now seen corresponding path program 1 times [2021-05-02 16:14:44,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:44,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208886657] [2021-05-02 16:14:44,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:44,310 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:44,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554431094] [2021-05-02 16:14:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:44,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 16:14:44,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:44,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:44,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:44,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:44,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:44,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:44,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208886657] [2021-05-02 16:14:44,491 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:44,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554431094] [2021-05-02 16:14:44,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554431094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:44,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:44,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:14:44,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55380931] [2021-05-02 16:14:44,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:14:44,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:44,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:14:44,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:14:44,492 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:44,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:44,660 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2021-05-02 16:14:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:14:44,661 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 16:14:44,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:44,662 INFO L225 Difference]: With dead ends: 87 [2021-05-02 16:14:44,662 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 16:14:44,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:14:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 16:14:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-05-02 16:14:44,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 55 states have internal predecessors, (69), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:14:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-05-02 16:14:44,668 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 29 [2021-05-02 16:14:44,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:44,668 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-05-02 16:14:44,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:44,668 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-05-02 16:14:44,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 16:14:44,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:44,671 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:44,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 16:14:44,873 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:44,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:44,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1680888588, now seen corresponding path program 1 times [2021-05-02 16:14:44,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:44,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978465347] [2021-05-02 16:14:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:44,880 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:44,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89198796] [2021-05-02 16:14:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:44,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 16:14:44,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:44,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:44,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:44,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:44,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:44,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:44,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:44,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:14:45,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:45,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978465347] [2021-05-02 16:14:45,029 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:45,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89198796] [2021-05-02 16:14:45,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89198796] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:14:45,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:14:45,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 16:14:45,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089975603] [2021-05-02 16:14:45,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:14:45,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:45,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:14:45,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:14:45,031 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:14:45,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:45,129 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2021-05-02 16:14:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 16:14:45,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-05-02 16:14:45,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:45,130 INFO L225 Difference]: With dead ends: 98 [2021-05-02 16:14:45,130 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 16:14:45,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:14:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 16:14:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2021-05-02 16:14:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 66 states have internal predecessors, (84), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:14:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-05-02 16:14:45,148 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 33 [2021-05-02 16:14:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:45,148 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-05-02 16:14:45,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:14:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-05-02 16:14:45,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 16:14:45,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:45,149 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:45,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:45,373 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:45,373 INFO L82 PathProgramCache]: Analyzing trace with hash 368374993, now seen corresponding path program 1 times [2021-05-02 16:14:45,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:45,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945486893] [2021-05-02 16:14:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:45,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:45,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896610917] [2021-05-02 16:14:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:45,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 16:14:45,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:45,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:14:45,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:45,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945486893] [2021-05-02 16:14:45,704 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:45,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896610917] [2021-05-02 16:14:45,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896610917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:45,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:45,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 16:14:45,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844238296] [2021-05-02 16:14:45,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 16:14:45,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:45,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 16:14:45,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:14:45,705 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:14:48,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:48,015 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2021-05-02 16:14:48,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 16:14:48,016 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 16:14:48,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:48,017 INFO L225 Difference]: With dead ends: 103 [2021-05-02 16:14:48,017 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 16:14:48,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:14:48,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 16:14:48,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2021-05-02 16:14:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 73 states have internal predecessors, (92), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:14:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2021-05-02 16:14:48,024 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 35 [2021-05-02 16:14:48,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:48,024 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2021-05-02 16:14:48,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:14:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2021-05-02 16:14:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 16:14:48,025 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:48,025 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:48,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 16:14:48,237 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:48,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:48,237 INFO L82 PathProgramCache]: Analyzing trace with hash -218431021, now seen corresponding path program 1 times [2021-05-02 16:14:48,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:48,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028016484] [2021-05-02 16:14:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:48,242 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:48,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275386821] [2021-05-02 16:14:48,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:48,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 16:14:48,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:48,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:14:48,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:48,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028016484] [2021-05-02 16:14:48,498 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:48,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275386821] [2021-05-02 16:14:48,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275386821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:48,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:48,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:14:48,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631434291] [2021-05-02 16:14:48,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:14:48,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:48,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:14:48,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:14:48,499 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:14:49,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:49,020 INFO L93 Difference]: Finished difference Result 123 states and 163 transitions. [2021-05-02 16:14:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 16:14:49,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 16:14:49,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:49,021 INFO L225 Difference]: With dead ends: 123 [2021-05-02 16:14:49,021 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 16:14:49,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 369.2ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:14:49,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 16:14:49,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-05-02 16:14:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 79 states have internal predecessors, (101), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:14:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2021-05-02 16:14:49,027 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 35 [2021-05-02 16:14:49,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:49,028 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2021-05-02 16:14:49,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:14:49,028 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2021-05-02 16:14:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:14:49,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:49,029 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:49,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 16:14:49,244 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:49,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:49,244 INFO L82 PathProgramCache]: Analyzing trace with hash 604176890, now seen corresponding path program 2 times [2021-05-02 16:14:49,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:49,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918748569] [2021-05-02 16:14:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:49,260 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:49,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350584090] [2021-05-02 16:14:49,260 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 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 [2021-05-02 16:14:49,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:14:49,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:14:49,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:14:49,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:49,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:49,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:49,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918748569] [2021-05-02 16:14:49,392 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:49,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350584090] [2021-05-02 16:14:49,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350584090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:49,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:49,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:14:49,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960399752] [2021-05-02 16:14:49,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:14:49,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:49,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:14:49,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:14:49,394 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:14:49,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:49,436 INFO L93 Difference]: Finished difference Result 128 states and 171 transitions. [2021-05-02 16:14:49,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:14:49,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-02 16:14:49,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:49,437 INFO L225 Difference]: With dead ends: 128 [2021-05-02 16:14:49,437 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 16:14:49,437 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:14:49,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 16:14:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-05-02 16:14:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.3297872340425532) internal successors, (125), 96 states have internal predecessors, (125), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:14:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 157 transitions. [2021-05-02 16:14:49,443 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 157 transitions. Word has length 36 [2021-05-02 16:14:49,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:49,443 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 157 transitions. [2021-05-02 16:14:49,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:14:49,443 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 157 transitions. [2021-05-02 16:14:49,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:14:49,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:49,444 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:49,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:49,653 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash 605964350, now seen corresponding path program 2 times [2021-05-02 16:14:49,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:49,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348111293] [2021-05-02 16:14:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:49,658 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:49,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144504757] [2021-05-02 16:14:49,658 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 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 [2021-05-02 16:14:49,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:14:49,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:14:49,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 16:14:49,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:49,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:00,293 WARN L205 SmtUtils]: Spent 8.41 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 16:15:13,636 WARN L205 SmtUtils]: Spent 13.29 s on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 16:15:13,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:13,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:14,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:14,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:14,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:14,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:14,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:14,975 WARN L159 QuantifierPusher]: Ignoring assumption.