/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/egcd2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:41:07,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:41:07,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:41:07,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:41:07,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:41:07,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:41:07,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:41:07,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:41:07,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:41:07,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:41:07,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:41:07,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:41:07,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:41:07,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:41:07,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:41:07,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:41:07,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:41:07,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:41:07,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:41:07,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:41:07,641 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 13:41:07,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:41:07,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:41:07,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:41:07,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:41:07,681 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:41:07,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:41:07,681 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:41:07,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:41:07,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:41:07,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:41:07,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:41:07,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:41:07,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:41:07,683 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:41:07,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:41:07,683 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:41:07,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:41:07,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:41:07,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:41:07,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:41:07,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:41:07,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:41:07,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:41:07,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:41:07,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:41:07,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:41:07,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:41:07,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:41:07,685 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:41:07,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:41:08,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:41:08,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:41:08,019 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:41:08,020 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:41:08,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2021-05-02 13:41:08,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81f113f54/2d1ede23dd01434682a0294eeaf9cae6/FLAG7ac54b279 [2021-05-02 13:41:08,506 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:41:08,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2021-05-02 13:41:08,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81f113f54/2d1ede23dd01434682a0294eeaf9cae6/FLAG7ac54b279 [2021-05-02 13:41:08,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81f113f54/2d1ede23dd01434682a0294eeaf9cae6 [2021-05-02 13:41:08,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:41:08,544 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:41:08,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:41:08,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:41:08,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:41:08,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:41:08" (1/1) ... [2021-05-02 13:41:08,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b8f07c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:41:08, skipping insertion in model container [2021-05-02 13:41:08,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:41:08" (1/1) ... [2021-05-02 13:41:08,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:41:08,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:41:08,729 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/egcd2-ll.c[490,503] [2021-05-02 13:41:08,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:41:08,783 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:41:08,795 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/egcd2-ll.c[490,503] [2021-05-02 13:41:08,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:41:08,843 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:41:08,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:41:08 WrapperNode [2021-05-02 13:41:08,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:41:08,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:41:08,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:41:08,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:41:08,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:41:08" (1/1) ... [2021-05-02 13:41:08,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:41:08" (1/1) ... [2021-05-02 13:41:08,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:41:08" (1/1) ... [2021-05-02 13:41:08,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:41:08" (1/1) ... [2021-05-02 13:41:08,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:41:08" (1/1) ... [2021-05-02 13:41:08,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:41:08" (1/1) ... [2021-05-02 13:41:08,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:41:08" (1/1) ... [2021-05-02 13:41:08,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:41:08,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:41:08,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:41:08,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:41:08,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:41:08" (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 13:41:08,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:41:08,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:41:08,964 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:41:08,964 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:41:08,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:41:08,964 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:41:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:41:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:41:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:41:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:41:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:41:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:41:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:41:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:41:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:41:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:41:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:41:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:41:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:41:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:41:09,295 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:41:09,295 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 13:41:09,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:41:09 BoogieIcfgContainer [2021-05-02 13:41:09,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:41:09,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:41:09,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:41:09,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:41:09,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:41:08" (1/3) ... [2021-05-02 13:41:09,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74cb9632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:41:09, skipping insertion in model container [2021-05-02 13:41:09,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:41:08" (2/3) ... [2021-05-02 13:41:09,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74cb9632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:41:09, skipping insertion in model container [2021-05-02 13:41:09,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:41:09" (3/3) ... [2021-05-02 13:41:09,303 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2021-05-02 13:41:09,308 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:41:09,311 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:41:09,327 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:41:09,346 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:41:09,346 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:41:09,347 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:41:09,347 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:41:09,347 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:41:09,347 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:41:09,347 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:41:09,347 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:41:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 13:41:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:41:09,365 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:09,366 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:09,366 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:09,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:09,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1872307417, now seen corresponding path program 1 times [2021-05-02 13:41:09,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:09,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46023483] [2021-05-02 13:41:09,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:09,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:41:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:09,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:41:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:09,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 13:41:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:09,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 13:41:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:09,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 13:41:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 13:41:09,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:09,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46023483] [2021-05-02 13:41:09,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46023483] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:41:09,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:41:09,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:41:09,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786491449] [2021-05-02 13:41:09,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:41:09,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:09,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:41:09,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:41:09,620 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:41:09,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:09,804 INFO L93 Difference]: Finished difference Result 67 states and 106 transitions. [2021-05-02 13:41:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:41:09,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-02 13:41:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:09,811 INFO L225 Difference]: With dead ends: 67 [2021-05-02 13:41:09,812 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 13:41:09,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:41:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 13:41:09,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 13:41:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 13:41:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 13:41:09,867 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 32 [2021-05-02 13:41:09,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:09,867 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 13:41:09,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:41:09,870 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 13:41:09,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 13:41:09,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:09,873 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:09,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:41:09,874 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:09,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:09,875 INFO L82 PathProgramCache]: Analyzing trace with hash 310247117, now seen corresponding path program 1 times [2021-05-02 13:41:09,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:09,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35769816] [2021-05-02 13:41:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:09,913 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:09,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959762815] [2021-05-02 13:41:09,914 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 13:41:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:09,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 13:41:09,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:10,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:10,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:10,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:10,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:10,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:41:10,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:10,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35769816] [2021-05-02 13:41:10,137 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:10,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959762815] [2021-05-02 13:41:10,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959762815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:10,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:10,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 13:41:10,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635658171] [2021-05-02 13:41:10,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:41:10,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:10,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:41:10,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:41:10,140 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:41:10,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:10,233 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2021-05-02 13:41:10,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:41:10,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 13:41:10,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:10,235 INFO L225 Difference]: With dead ends: 49 [2021-05-02 13:41:10,235 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 13:41:10,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:41:10,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 13:41:10,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-02 13:41:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 13:41:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-02 13:41:10,250 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 33 [2021-05-02 13:41:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:10,250 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-02 13:41:10,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:41:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-02 13:41:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 13:41:10,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:10,251 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:10,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:41:10,476 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1036600877, now seen corresponding path program 1 times [2021-05-02 13:41:10,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:10,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627605488] [2021-05-02 13:41:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:10,510 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:10,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705645546] [2021-05-02 13:41:10,510 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 13:41:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:10,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:41:10,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:10,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:10,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:10,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:10,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:10,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:10,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:10,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:10,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:41:10,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:10,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627605488] [2021-05-02 13:41:10,785 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:10,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705645546] [2021-05-02 13:41:10,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705645546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:10,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:10,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:41:10,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16476517] [2021-05-02 13:41:10,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:41:10,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:10,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:41:10,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:41:10,787 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:41:10,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:10,948 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-05-02 13:41:10,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:41:10,949 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 13:41:10,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:10,953 INFO L225 Difference]: With dead ends: 54 [2021-05-02 13:41:10,953 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 13:41:10,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:41:10,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 13:41:10,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2021-05-02 13:41:10,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:41:10,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 13:41:10,983 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 34 [2021-05-02 13:41:10,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:10,983 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 13:41:10,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:41:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 13:41:10,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 13:41:10,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:10,984 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:11,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:11,209 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:11,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:11,210 INFO L82 PathProgramCache]: Analyzing trace with hash -844413996, now seen corresponding path program 1 times [2021-05-02 13:41:11,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:11,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109638474] [2021-05-02 13:41:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:11,223 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:11,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436735787] [2021-05-02 13:41:11,224 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 13:41:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:11,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:41:11,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:11,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:41:11,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:11,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109638474] [2021-05-02 13:41:11,462 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:11,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436735787] [2021-05-02 13:41:11,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436735787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:11,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:11,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:41:11,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664224714] [2021-05-02 13:41:11,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:41:11,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:11,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:41:11,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:41:11,466 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 13:41:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:11,626 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2021-05-02 13:41:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:41:11,627 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-02 13:41:11,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:11,630 INFO L225 Difference]: With dead ends: 53 [2021-05-02 13:41:11,630 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 13:41:11,630 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:41:11,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 13:41:11,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 13:41:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 13:41:11,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2021-05-02 13:41:11,646 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 39 [2021-05-02 13:41:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:11,646 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2021-05-02 13:41:11,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 13:41:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2021-05-02 13:41:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 13:41:11,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:11,648 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:11,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:11,852 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:11,853 INFO L82 PathProgramCache]: Analyzing trace with hash -644493747, now seen corresponding path program 1 times [2021-05-02 13:41:11,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:11,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121071078] [2021-05-02 13:41:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:11,864 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:11,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254699] [2021-05-02 13:41:11,864 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 13:41:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:11,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:41:11,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:11,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:11,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-02 13:41:12,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:12,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121071078] [2021-05-02 13:41:12,118 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:12,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254699] [2021-05-02 13:41:12,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:12,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:12,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:41:12,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097548277] [2021-05-02 13:41:12,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:41:12,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:12,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:41:12,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:41:12,120 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 13:41:12,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:12,241 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-05-02 13:41:12,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:41:12,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 13:41:12,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:12,243 INFO L225 Difference]: With dead ends: 57 [2021-05-02 13:41:12,243 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 13:41:12,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:41:12,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 13:41:12,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 13:41:12,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 13:41:12,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-05-02 13:41:12,253 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 44 [2021-05-02 13:41:12,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:12,254 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-05-02 13:41:12,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 13:41:12,254 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-05-02 13:41:12,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 13:41:12,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:12,255 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:12,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:12,478 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:12,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:12,479 INFO L82 PathProgramCache]: Analyzing trace with hash -79102156, now seen corresponding path program 1 times [2021-05-02 13:41:12,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:12,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759365303] [2021-05-02 13:41:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:12,489 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:12,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658851781] [2021-05-02 13:41:12,489 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 13:41:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:12,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:41:12,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:12,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 13:41:12,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:12,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759365303] [2021-05-02 13:41:12,803 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:12,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658851781] [2021-05-02 13:41:12,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658851781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:12,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:12,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:41:12,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912789135] [2021-05-02 13:41:12,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:41:12,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:12,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:41:12,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:41:12,805 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 13:41:15,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:15,071 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-05-02 13:41:15,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:41:15,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2021-05-02 13:41:15,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:15,076 INFO L225 Difference]: With dead ends: 61 [2021-05-02 13:41:15,076 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 13:41:15,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:41:15,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 13:41:15,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-05-02 13:41:15,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 13:41:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-05-02 13:41:15,089 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 49 [2021-05-02 13:41:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:15,089 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-05-02 13:41:15,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 13:41:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-05-02 13:41:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 13:41:15,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:15,090 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:15,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 13:41:15,295 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:15,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2126113716, now seen corresponding path program 1 times [2021-05-02 13:41:15,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:15,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435965318] [2021-05-02 13:41:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:15,304 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:15,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240183603] [2021-05-02 13:41:15,304 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 13:41:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:15,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:41:15,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:15,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 13:41:15,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:15,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435965318] [2021-05-02 13:41:15,554 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:15,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240183603] [2021-05-02 13:41:15,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240183603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:15,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:15,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:41:15,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997508489] [2021-05-02 13:41:15,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:41:15,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:15,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:41:15,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:41:15,557 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 13:41:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:15,722 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2021-05-02 13:41:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:41:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-05-02 13:41:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:15,725 INFO L225 Difference]: With dead ends: 88 [2021-05-02 13:41:15,725 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 13:41:15,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:41:15,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 13:41:15,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-05-02 13:41:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 13:41:15,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2021-05-02 13:41:15,759 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 56 [2021-05-02 13:41:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:15,761 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2021-05-02 13:41:15,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 13:41:15,761 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2021-05-02 13:41:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 13:41:15,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:15,764 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:15,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:15,985 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:15,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:15,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1051433450, now seen corresponding path program 1 times [2021-05-02 13:41:15,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:15,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355233482] [2021-05-02 13:41:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:15,995 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:15,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264678066] [2021-05-02 13:41:15,995 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 13:41:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:16,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 13:41:16,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:16,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 13:41:16,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:16,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355233482] [2021-05-02 13:41:16,234 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:16,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264678066] [2021-05-02 13:41:16,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264678066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:16,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:16,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:41:16,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38538911] [2021-05-02 13:41:16,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:41:16,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:16,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:41:16,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:41:16,235 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 13:41:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:16,421 INFO L93 Difference]: Finished difference Result 121 states and 167 transitions. [2021-05-02 13:41:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:41:16,422 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2021-05-02 13:41:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:16,423 INFO L225 Difference]: With dead ends: 121 [2021-05-02 13:41:16,423 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 13:41:16,424 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:41:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 13:41:16,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2021-05-02 13:41:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 58 states have internal predecessors, (64), 39 states have call successors, (39), 9 states have call predecessors, (39), 8 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-02 13:41:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2021-05-02 13:41:16,459 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 58 [2021-05-02 13:41:16,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:16,460 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2021-05-02 13:41:16,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 13:41:16,460 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2021-05-02 13:41:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 13:41:16,465 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:16,465 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:16,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:16,681 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:16,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:16,681 INFO L82 PathProgramCache]: Analyzing trace with hash 998199389, now seen corresponding path program 1 times [2021-05-02 13:41:16,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:16,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525565060] [2021-05-02 13:41:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:16,691 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:16,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010694640] [2021-05-02 13:41:16,691 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 13:41:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:16,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 13:41:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:16,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-02 13:41:17,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:17,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525565060] [2021-05-02 13:41:17,000 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:17,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010694640] [2021-05-02 13:41:17,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010694640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:17,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:17,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:41:17,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736015490] [2021-05-02 13:41:17,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:41:17,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:17,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:41:17,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:41:17,002 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 13:41:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:17,277 INFO L93 Difference]: Finished difference Result 147 states and 208 transitions. [2021-05-02 13:41:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:41:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-05-02 13:41:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:17,279 INFO L225 Difference]: With dead ends: 147 [2021-05-02 13:41:17,279 INFO L226 Difference]: Without dead ends: 144 [2021-05-02 13:41:17,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:41:17,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-02 13:41:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-05-02 13:41:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 80 states have internal predecessors, (88), 58 states have call successors, (58), 10 states have call predecessors, (58), 9 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 13:41:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 201 transitions. [2021-05-02 13:41:17,306 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 201 transitions. Word has length 64 [2021-05-02 13:41:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:17,306 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 201 transitions. [2021-05-02 13:41:17,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 13:41:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 201 transitions. [2021-05-02 13:41:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 13:41:17,307 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:17,307 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:17,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 13:41:17,533 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:17,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:17,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1412509540, now seen corresponding path program 2 times [2021-05-02 13:41:17,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:17,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037364592] [2021-05-02 13:41:17,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:17,542 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:17,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28022934] [2021-05-02 13:41:17,542 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 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 13:41:17,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:41:17,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:41:17,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 13:41:17,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:17,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-05-02 13:41:17,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:17,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037364592] [2021-05-02 13:41:17,944 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:17,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28022934] [2021-05-02 13:41:17,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28022934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:17,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:17,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 13:41:17,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962162575] [2021-05-02 13:41:17,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:41:17,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:17,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:41:17,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:41:17,946 INFO L87 Difference]: Start difference. First operand 141 states and 201 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 13:41:18,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:18,361 INFO L93 Difference]: Finished difference Result 149 states and 208 transitions. [2021-05-02 13:41:18,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:41:18,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 69 [2021-05-02 13:41:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:18,363 INFO L225 Difference]: With dead ends: 149 [2021-05-02 13:41:18,363 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 13:41:18,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:41:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 13:41:18,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2021-05-02 13:41:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 83 states have internal predecessors, (91), 58 states have call successors, (58), 11 states have call predecessors, (58), 10 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 13:41:18,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 204 transitions. [2021-05-02 13:41:18,386 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 204 transitions. Word has length 69 [2021-05-02 13:41:18,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:18,386 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 204 transitions. [2021-05-02 13:41:18,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 13:41:18,387 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 204 transitions. [2021-05-02 13:41:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 13:41:18,387 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:18,387 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:18,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:18,613 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:18,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:18,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1763593091, now seen corresponding path program 3 times [2021-05-02 13:41:18,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:18,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249255404] [2021-05-02 13:41:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:18,621 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:18,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541569254] [2021-05-02 13:41:18,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:18,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:41:18,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:41:18,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 13:41:18,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:18,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:18,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 13:41:19,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:19,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249255404] [2021-05-02 13:41:19,089 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:19,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541569254] [2021-05-02 13:41:19,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541569254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:19,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:19,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 13:41:19,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696966866] [2021-05-02 13:41:19,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:41:19,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:19,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:41:19,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:41:19,104 INFO L87 Difference]: Start difference. First operand 145 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 13:41:19,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:19,538 INFO L93 Difference]: Finished difference Result 153 states and 211 transitions. [2021-05-02 13:41:19,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:41:19,539 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-02 13:41:19,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:19,543 INFO L225 Difference]: With dead ends: 153 [2021-05-02 13:41:19,543 INFO L226 Difference]: Without dead ends: 151 [2021-05-02 13:41:19,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:41:19,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-02 13:41:19,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2021-05-02 13:41:19,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 86 states have internal predecessors, (94), 58 states have call successors, (58), 12 states have call predecessors, (58), 11 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 13:41:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 207 transitions. [2021-05-02 13:41:19,571 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 207 transitions. Word has length 74 [2021-05-02 13:41:19,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:19,573 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 207 transitions. [2021-05-02 13:41:19,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 13:41:19,573 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 207 transitions. [2021-05-02 13:41:19,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 13:41:19,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:19,574 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:19,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:19,798 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:19,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1525288661, now seen corresponding path program 2 times [2021-05-02 13:41:19,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:19,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187813889] [2021-05-02 13:41:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:19,810 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:19,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095398575] [2021-05-02 13:41:19,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:19,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:41:19,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:41:19,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 13:41:19,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:19,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:19,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 27 proven. 32 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-05-02 13:41:20,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:20,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187813889] [2021-05-02 13:41:20,102 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:20,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095398575] [2021-05-02 13:41:20,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095398575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:20,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:20,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 13:41:20,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414161102] [2021-05-02 13:41:20,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:41:20,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:20,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:41:20,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:41:20,104 INFO L87 Difference]: Start difference. First operand 149 states and 207 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 13:41:20,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:20,526 INFO L93 Difference]: Finished difference Result 171 states and 236 transitions. [2021-05-02 13:41:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:41:20,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2021-05-02 13:41:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:20,530 INFO L225 Difference]: With dead ends: 171 [2021-05-02 13:41:20,530 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 13:41:20,530 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-02 13:41:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 13:41:20,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 163. [2021-05-02 13:41:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 94 states have internal predecessors, (103), 62 states have call successors, (62), 14 states have call predecessors, (62), 13 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 13:41:20,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 224 transitions. [2021-05-02 13:41:20,559 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 224 transitions. Word has length 78 [2021-05-02 13:41:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:20,559 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 224 transitions. [2021-05-02 13:41:20,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 13:41:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 224 transitions. [2021-05-02 13:41:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 13:41:20,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:20,561 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:20,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 13:41:20,777 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash 815826741, now seen corresponding path program 1 times [2021-05-02 13:41:20,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:20,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297607819] [2021-05-02 13:41:20,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:20,783 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:20,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3034815] [2021-05-02 13:41:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:20,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 13:41:20,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:20,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:20,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:21,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:21,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:21,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:21,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:21,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:21,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:21,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:21,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:21,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 44 proven. 25 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 13:41:21,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:21,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297607819] [2021-05-02 13:41:21,292 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:21,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3034815] [2021-05-02 13:41:21,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3034815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:21,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:21,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 13:41:21,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680429262] [2021-05-02 13:41:21,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:41:21,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:21,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:41:21,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:41:21,293 INFO L87 Difference]: Start difference. First operand 163 states and 224 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 13:41:21,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:21,810 INFO L93 Difference]: Finished difference Result 188 states and 260 transitions. [2021-05-02 13:41:21,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:41:21,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 80 [2021-05-02 13:41:21,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:21,813 INFO L225 Difference]: With dead ends: 188 [2021-05-02 13:41:21,813 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 13:41:21,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-02 13:41:21,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 13:41:21,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-05-02 13:41:21,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 98 states have (on average 1.183673469387755) internal successors, (116), 106 states have internal predecessors, (116), 71 states have call successors, (71), 15 states have call predecessors, (71), 14 states have return successors, (68), 62 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-02 13:41:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 255 transitions. [2021-05-02 13:41:21,838 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 255 transitions. Word has length 80 [2021-05-02 13:41:21,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:21,838 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 255 transitions. [2021-05-02 13:41:21,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 13:41:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 255 transitions. [2021-05-02 13:41:21,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 13:41:21,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:21,839 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 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, 1] [2021-05-02 13:41:22,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 13:41:22,061 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:22,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1902002164, now seen corresponding path program 4 times [2021-05-02 13:41:22,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:22,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798372858] [2021-05-02 13:41:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:22,070 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:22,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618522150] [2021-05-02 13:41:22,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:22,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:41:22,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:41:22,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:41:22,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:22,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-05-02 13:41:22,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:22,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798372858] [2021-05-02 13:41:22,314 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:22,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618522150] [2021-05-02 13:41:22,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618522150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:41:22,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:41:22,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 13:41:22,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783680548] [2021-05-02 13:41:22,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 13:41:22,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:22,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 13:41:22,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:41:22,315 INFO L87 Difference]: Start difference. First operand 184 states and 255 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 13:41:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:22,415 INFO L93 Difference]: Finished difference Result 222 states and 310 transitions. [2021-05-02 13:41:22,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:41:22,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 89 [2021-05-02 13:41:22,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:22,417 INFO L225 Difference]: With dead ends: 222 [2021-05-02 13:41:22,417 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 13:41:22,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:41:22,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 13:41:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 158. [2021-05-02 13:41:22,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 92 states have internal predecessors, (95), 58 states have call successors, (58), 15 states have call predecessors, (58), 14 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 13:41:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 208 transitions. [2021-05-02 13:41:22,442 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 208 transitions. Word has length 89 [2021-05-02 13:41:22,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:22,442 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 208 transitions. [2021-05-02 13:41:22,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 13:41:22,443 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 208 transitions. [2021-05-02 13:41:22,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 13:41:22,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:22,445 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:22,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 13:41:22,649 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:22,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1738688612, now seen corresponding path program 1 times [2021-05-02 13:41:22,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:22,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508257862] [2021-05-02 13:41:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:22,655 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:22,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934387322] [2021-05-02 13:41:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:41:22,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 13:41:22,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:22,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:22,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:23,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:23,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:23,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:23,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 83 proven. 56 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 13:41:25,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:25,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508257862] [2021-05-02 13:41:25,413 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:25,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934387322] [2021-05-02 13:41:25,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934387322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:25,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:25,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 13:41:25,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662325804] [2021-05-02 13:41:25,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 13:41:25,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:25,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 13:41:25,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:41:25,414 INFO L87 Difference]: Start difference. First operand 158 states and 208 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 13:41:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:32,047 INFO L93 Difference]: Finished difference Result 165 states and 214 transitions. [2021-05-02 13:41:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:41:32,048 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 96 [2021-05-02 13:41:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:32,049 INFO L225 Difference]: With dead ends: 165 [2021-05-02 13:41:32,049 INFO L226 Difference]: Without dead ends: 163 [2021-05-02 13:41:32,050 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 417.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:41:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-02 13:41:32,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 137. [2021-05-02 13:41:32,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 80 states have internal predecessors, (83), 49 states have call successors, (49), 14 states have call predecessors, (49), 13 states have return successors, (46), 42 states have call predecessors, (46), 46 states have call successors, (46) [2021-05-02 13:41:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 178 transitions. [2021-05-02 13:41:32,069 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 178 transitions. Word has length 96 [2021-05-02 13:41:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:32,069 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 178 transitions. [2021-05-02 13:41:32,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 13:41:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 178 transitions. [2021-05-02 13:41:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 13:41:32,070 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:32,070 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:32,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:32,285 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:32,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1265808182, now seen corresponding path program 3 times [2021-05-02 13:41:32,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:32,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636808807] [2021-05-02 13:41:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:32,292 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:32,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776815796] [2021-05-02 13:41:32,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:32,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 13:41:32,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:41:32,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:41:32,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:32,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:32,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:32,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:32,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-05-02 13:41:32,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:32,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636808807] [2021-05-02 13:41:32,562 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:32,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776815796] [2021-05-02 13:41:32,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776815796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:32,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:32,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 13:41:32,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184775078] [2021-05-02 13:41:32,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:41:32,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:32,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:41:32,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:41:32,564 INFO L87 Difference]: Start difference. First operand 137 states and 178 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 13:41:32,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:32,661 INFO L93 Difference]: Finished difference Result 143 states and 183 transitions. [2021-05-02 13:41:32,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:41:32,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 100 [2021-05-02 13:41:32,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:32,663 INFO L225 Difference]: With dead ends: 143 [2021-05-02 13:41:32,663 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 13:41:32,663 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:41:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 13:41:32,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-02 13:41:32,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 83 states have internal predecessors, (86), 49 states have call successors, (49), 15 states have call predecessors, (49), 14 states have return successors, (46), 42 states have call predecessors, (46), 46 states have call successors, (46) [2021-05-02 13:41:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 181 transitions. [2021-05-02 13:41:32,683 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 181 transitions. Word has length 100 [2021-05-02 13:41:32,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:32,686 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 181 transitions. [2021-05-02 13:41:32,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 13:41:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 181 transitions. [2021-05-02 13:41:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 13:41:32,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:32,687 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:32,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:32,901 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:32,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:32,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1068463892, now seen corresponding path program 2 times [2021-05-02 13:41:32,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:32,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383355967] [2021-05-02 13:41:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:32,908 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:32,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995964015] [2021-05-02 13:41:32,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:32,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:41:32,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:41:32,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 13:41:32,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:33,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 47 proven. 39 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-05-02 13:41:33,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:33,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383355967] [2021-05-02 13:41:33,598 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:33,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995964015] [2021-05-02 13:41:33,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995964015] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:33,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:33,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 13:41:33,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558216917] [2021-05-02 13:41:33,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 13:41:33,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:33,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 13:41:33,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:41:33,600 INFO L87 Difference]: Start difference. First operand 141 states and 181 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-05-02 13:41:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:34,252 INFO L93 Difference]: Finished difference Result 171 states and 225 transitions. [2021-05-02 13:41:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 13:41:34,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 102 [2021-05-02 13:41:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:34,254 INFO L225 Difference]: With dead ends: 171 [2021-05-02 13:41:34,254 INFO L226 Difference]: Without dead ends: 168 [2021-05-02 13:41:34,255 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 492.1ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-02 13:41:34,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-02 13:41:34,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2021-05-02 13:41:34,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 95 states have internal predecessors, (100), 61 states have call successors, (61), 16 states have call predecessors, (61), 15 states have return successors, (58), 54 states have call predecessors, (58), 58 states have call successors, (58) [2021-05-02 13:41:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 219 transitions. [2021-05-02 13:41:34,277 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 219 transitions. Word has length 102 [2021-05-02 13:41:34,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:34,277 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 219 transitions. [2021-05-02 13:41:34,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-05-02 13:41:34,278 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 219 transitions. [2021-05-02 13:41:34,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 13:41:34,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:34,279 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:34,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:34,493 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:34,493 INFO L82 PathProgramCache]: Analyzing trace with hash 351496396, now seen corresponding path program 3 times [2021-05-02 13:41:34,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:34,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521162220] [2021-05-02 13:41:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:34,500 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:34,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456797915] [2021-05-02 13:41:34,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:34,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:41:34,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:41:34,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 13:41:34,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:34,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-02 13:41:34,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:34,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521162220] [2021-05-02 13:41:34,752 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:34,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456797915] [2021-05-02 13:41:34,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456797915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:34,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:34,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 13:41:34,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943198962] [2021-05-02 13:41:34,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:41:34,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:34,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:41:34,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:41:34,754 INFO L87 Difference]: Start difference. First operand 166 states and 219 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-02 13:41:35,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:35,029 INFO L93 Difference]: Finished difference Result 212 states and 296 transitions. [2021-05-02 13:41:35,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:41:35,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2021-05-02 13:41:35,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:35,031 INFO L225 Difference]: With dead ends: 212 [2021-05-02 13:41:35,031 INFO L226 Difference]: Without dead ends: 204 [2021-05-02 13:41:35,034 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:41:35,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-02 13:41:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 185. [2021-05-02 13:41:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 96 states have (on average 1.15625) internal successors, (111), 98 states have internal predecessors, (111), 73 states have call successors, (73), 16 states have call predecessors, (73), 15 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2021-05-02 13:41:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 254 transitions. [2021-05-02 13:41:35,061 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 254 transitions. Word has length 105 [2021-05-02 13:41:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:35,061 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 254 transitions. [2021-05-02 13:41:35,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-02 13:41:35,061 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 254 transitions. [2021-05-02 13:41:35,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 13:41:35,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:35,063 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:35,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 13:41:35,285 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:35,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2080181613, now seen corresponding path program 2 times [2021-05-02 13:41:35,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:35,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018200228] [2021-05-02 13:41:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:35,293 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:35,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940603384] [2021-05-02 13:41:35,293 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:35,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:41:35,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:41:35,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 13:41:35,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:35,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-05-02 13:41:35,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:35,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018200228] [2021-05-02 13:41:35,882 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:35,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940603384] [2021-05-02 13:41:35,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940603384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:35,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:35,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 13:41:35,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561042024] [2021-05-02 13:41:35,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 13:41:35,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:35,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 13:41:35,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:41:35,885 INFO L87 Difference]: Start difference. First operand 185 states and 254 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-02 13:41:37,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:37,693 INFO L93 Difference]: Finished difference Result 260 states and 372 transitions. [2021-05-02 13:41:37,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 13:41:37,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 111 [2021-05-02 13:41:37,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:37,695 INFO L225 Difference]: With dead ends: 260 [2021-05-02 13:41:37,695 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 13:41:37,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 848.3ms TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 13:41:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 13:41:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 252. [2021-05-02 13:41:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 128 states have internal predecessors, (148), 109 states have call successors, (109), 17 states have call predecessors, (109), 16 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2021-05-02 13:41:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 363 transitions. [2021-05-02 13:41:37,734 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 363 transitions. Word has length 111 [2021-05-02 13:41:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:37,735 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 363 transitions. [2021-05-02 13:41:37,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-02 13:41:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 363 transitions. [2021-05-02 13:41:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 13:41:37,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:37,737 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:37,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 13:41:37,952 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:37,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1295483154, now seen corresponding path program 3 times [2021-05-02 13:41:37,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:37,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650328366] [2021-05-02 13:41:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:37,958 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:37,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284201200] [2021-05-02 13:41:37,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:38,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:41:38,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:41:38,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 13:41:38,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:38,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2021-05-02 13:41:38,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:38,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650328366] [2021-05-02 13:41:38,500 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:38,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284201200] [2021-05-02 13:41:38,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284201200] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:38,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:38,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 13:41:38,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930033408] [2021-05-02 13:41:38,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 13:41:38,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:38,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 13:41:38,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:41:38,501 INFO L87 Difference]: Start difference. First operand 252 states and 363 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-02 13:41:39,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:39,272 INFO L93 Difference]: Finished difference Result 294 states and 415 transitions. [2021-05-02 13:41:39,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:41:39,273 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 116 [2021-05-02 13:41:39,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:39,275 INFO L225 Difference]: With dead ends: 294 [2021-05-02 13:41:39,275 INFO L226 Difference]: Without dead ends: 292 [2021-05-02 13:41:39,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-02 13:41:39,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-02 13:41:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2021-05-02 13:41:39,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 147 states have (on average 1.163265306122449) internal successors, (171), 149 states have internal predecessors, (171), 121 states have call successors, (121), 21 states have call predecessors, (121), 20 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2021-05-02 13:41:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 410 transitions. [2021-05-02 13:41:39,316 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 410 transitions. Word has length 116 [2021-05-02 13:41:39,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:39,316 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 410 transitions. [2021-05-02 13:41:39,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-02 13:41:39,316 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 410 transitions. [2021-05-02 13:41:39,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 13:41:39,318 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:39,318 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:39,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 13:41:39,533 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:39,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:39,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1515779717, now seen corresponding path program 4 times [2021-05-02 13:41:39,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:39,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222822848] [2021-05-02 13:41:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:39,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:39,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279961085] [2021-05-02 13:41:39,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:41:39,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:41:39,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:41:39,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-02 13:41:39,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:41:39,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:39,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:41:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 111 proven. 125 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-05-02 13:41:40,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:41:40,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222822848] [2021-05-02 13:41:40,377 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:41:40,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279961085] [2021-05-02 13:41:40,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279961085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:41:40,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:41:40,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 13:41:40,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786524142] [2021-05-02 13:41:40,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 13:41:40,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:41:40,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 13:41:40,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:41:40,378 INFO L87 Difference]: Start difference. First operand 289 states and 410 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-05-02 13:41:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:41:47,927 INFO L93 Difference]: Finished difference Result 305 states and 423 transitions. [2021-05-02 13:41:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 13:41:47,928 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 118 [2021-05-02 13:41:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:41:47,930 INFO L225 Difference]: With dead ends: 305 [2021-05-02 13:41:47,930 INFO L226 Difference]: Without dead ends: 303 [2021-05-02 13:41:47,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 529.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-02 13:41:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-05-02 13:41:47,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2021-05-02 13:41:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 156 states have (on average 1.1538461538461537) internal successors, (180), 158 states have internal predecessors, (180), 121 states have call successors, (121), 24 states have call predecessors, (121), 23 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2021-05-02 13:41:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 419 transitions. [2021-05-02 13:41:47,971 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 419 transitions. Word has length 118 [2021-05-02 13:41:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:41:47,972 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 419 transitions. [2021-05-02 13:41:47,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-05-02 13:41:47,972 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 419 transitions. [2021-05-02 13:41:47,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-02 13:41:47,973 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:41:47,973 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:41:48,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 13:41:48,189 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:41:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:41:48,189 INFO L82 PathProgramCache]: Analyzing trace with hash 2030078771, now seen corresponding path program 5 times [2021-05-02 13:41:48,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:41:48,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895206730] [2021-05-02 13:41:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:41:48,194 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:41:48,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784446897] [2021-05-02 13:41:48,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true