/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:49:49,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:49:49,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:49:49,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:49:49,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:49:49,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:49:49,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:49:49,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:49:49,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:49:49,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:49:49,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:49:49,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:49:49,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:49:49,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:49:49,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:49:49,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:49:49,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:49:49,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:49:49,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:49:49,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:49:49,980 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 14:49:50,015 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:49:50,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:49:50,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:49:50,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:49:50,017 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:49:50,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:49:50,017 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:49:50,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:49:50,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:49:50,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:49:50,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:49:50,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:49:50,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:49:50,018 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:49:50,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:49:50,018 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:49:50,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:49:50,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:49:50,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:49:50,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:49:50,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:49:50,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:49:50,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:49:50,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:49:50,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:49:50,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:49:50,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:49:50,019 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:49:50,019 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:49:50,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:49:50,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:49:50,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:49:50,239 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:49:50,240 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:49:50,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2021-05-02 14:49:50,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/371634bde/bdb2920c21b94bf1863eeaa962a66aa9/FLAG957ccc784 [2021-05-02 14:49:50,625 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:49:50,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2021-05-02 14:49:50,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/371634bde/bdb2920c21b94bf1863eeaa962a66aa9/FLAG957ccc784 [2021-05-02 14:49:50,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/371634bde/bdb2920c21b94bf1863eeaa962a66aa9 [2021-05-02 14:49:50,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:49:50,647 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:49:50,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:49:50,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:49:50,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:49:50,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:49:50" (1/1) ... [2021-05-02 14:49:50,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3814a8d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:50, skipping insertion in model container [2021-05-02 14:49:50,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:49:50" (1/1) ... [2021-05-02 14:49:50,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:49:50,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:49:50,746 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2021-05-02 14:49:50,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:49:50,762 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:49:50,807 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2021-05-02 14:49:50,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:49:50,852 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:49:50,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:50 WrapperNode [2021-05-02 14:49:50,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:49:50,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:49:50,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:49:50,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:49:50,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:50" (1/1) ... [2021-05-02 14:49:50,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:50" (1/1) ... [2021-05-02 14:49:50,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:50" (1/1) ... [2021-05-02 14:49:50,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:50" (1/1) ... [2021-05-02 14:49:50,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:50" (1/1) ... [2021-05-02 14:49:50,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:50" (1/1) ... [2021-05-02 14:49:50,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:50" (1/1) ... [2021-05-02 14:49:50,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:49:50,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:49:50,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:49:50,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:49:50,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:50" (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 14:49:51,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:49:51,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:49:51,014 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:49:51,014 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:49:51,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:49:51,014 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:49:51,015 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:49:51,015 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:49:51,015 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:49:51,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:49:51,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:49:51,016 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:49:51,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:49:51,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:49:51,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:49:51,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:49:51,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:49:51,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:49:51,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:49:51,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:49:51,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:49:51,321 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:49:51,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:49:51 BoogieIcfgContainer [2021-05-02 14:49:51,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:49:51,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:49:51,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:49:51,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:49:51,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:49:50" (1/3) ... [2021-05-02 14:49:51,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12cc49d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:49:51, skipping insertion in model container [2021-05-02 14:49:51,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:50" (2/3) ... [2021-05-02 14:49:51,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12cc49d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:49:51, skipping insertion in model container [2021-05-02 14:49:51,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:49:51" (3/3) ... [2021-05-02 14:49:51,327 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound10.c [2021-05-02 14:49:51,330 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:49:51,345 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:49:51,355 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:49:51,377 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:49:51,377 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:49:51,377 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:49:51,377 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:49:51,377 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:49:51,377 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:49:51,377 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:49:51,377 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:49:51,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:49:51,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 14:49:51,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:51,409 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 14:49:51,409 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:51,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2021-05-02 14:49:51,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:51,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849666233] [2021-05-02 14:49:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:51,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:49:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:51,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:49:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:51,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:49:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:51,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:49:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:51,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:49:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:51,567 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 14:49:51,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:51,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849666233] [2021-05-02 14:49:51,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849666233] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:49:51,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:49:51,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:49:51,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490301151] [2021-05-02 14:49:51,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:49:51,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:51,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:49:51,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:49:51,581 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:51,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:51,670 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2021-05-02 14:49:51,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:49:51,671 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 14:49:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:51,676 INFO L225 Difference]: With dead ends: 72 [2021-05-02 14:49:51,676 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:49:51,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:49:51,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:49:51,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-02 14:49:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:49:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-02 14:49:51,703 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-02 14:49:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:51,703 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-02 14:49:51,704 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 14:49:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-02 14:49:51,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:49:51,705 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:51,705 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 14:49:51,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:49:51,705 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:51,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2021-05-02 14:49:51,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:51,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857972313] [2021-05-02 14:49:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:51,720 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:51,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043741101] [2021-05-02 14:49:51,720 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 14:49:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:51,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:49:51,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:51,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,941 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 14:49:51,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:51,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857972313] [2021-05-02 14:49:51,941 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:51,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043741101] [2021-05-02 14:49:51,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043741101] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:49:51,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:49:51,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:49:51,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251225384] [2021-05-02 14:49:51,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 14:49:51,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:51,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 14:49:51,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:49:51,943 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:51,954 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-05-02 14:49:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 14:49:51,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 14:49:51,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:51,956 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:49:51,956 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 14:49:51,956 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:49:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 14:49:51,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 14:49:51,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:49:51,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-02 14:49:51,962 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-02 14:49:51,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:51,963 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-02 14:49:51,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:51,963 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-02 14:49:51,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:49:51,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:51,964 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 14:49:52,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:49:52,180 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2021-05-02 14:49:52,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:52,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324649932] [2021-05-02 14:49:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:52,209 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:52,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541123238] [2021-05-02 14:49:52,210 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 14:49:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:52,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:49:52,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:52,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,417 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 14:49:52,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:52,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324649932] [2021-05-02 14:49:52,418 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:52,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541123238] [2021-05-02 14:49:52,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541123238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:52,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:52,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:49:52,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927538245] [2021-05-02 14:49:52,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:49:52,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:52,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:49:52,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:49:52,420 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:52,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:52,523 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2021-05-02 14:49:52,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:49:52,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 14:49:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:52,524 INFO L225 Difference]: With dead ends: 53 [2021-05-02 14:49:52,524 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 14:49:52,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:49:52,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 14:49:52,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-02 14:49:52,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:49:52,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 14:49:52,530 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-02 14:49:52,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:52,531 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 14:49:52,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:52,531 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 14:49:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 14:49:52,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:52,532 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:52,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:52,760 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:52,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2021-05-02 14:49:52,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:52,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400730468] [2021-05-02 14:49:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:52,769 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:52,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010903303] [2021-05-02 14:49:52,769 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 14:49:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:52,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:49:52,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:52,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,924 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 14:49:52,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:52,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400730468] [2021-05-02 14:49:52,924 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:52,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010903303] [2021-05-02 14:49:52,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010903303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:52,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:52,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:49:52,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919298348] [2021-05-02 14:49:52,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:49:52,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:52,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:49:52,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:49:52,926 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:53,031 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2021-05-02 14:49:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:49:53,031 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 14:49:53,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:53,032 INFO L225 Difference]: With dead ends: 59 [2021-05-02 14:49:53,032 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 14:49:53,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:49:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 14:49:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-05-02 14:49:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:49:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-05-02 14:49:53,039 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2021-05-02 14:49:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:53,039 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-05-02 14:49:53,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:53,039 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-05-02 14:49:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 14:49:53,040 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:53,040 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 14:49:53,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:53,256 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:53,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:53,256 INFO L82 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2021-05-02 14:49:53,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:53,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130854879] [2021-05-02 14:49:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:53,265 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:53,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395811075] [2021-05-02 14:49:53,265 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 14:49:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:53,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:49:53,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:53,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:49:53,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:53,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130854879] [2021-05-02 14:49:53,419 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:53,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395811075] [2021-05-02 14:49:53,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395811075] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:49:53,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:49:53,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:49:53,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961786257] [2021-05-02 14:49:53,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:49:53,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:53,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:49:53,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:49:53,420 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:53,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:53,445 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-05-02 14:49:53,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:49:53,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 14:49:53,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:53,447 INFO L225 Difference]: With dead ends: 63 [2021-05-02 14:49:53,447 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 14:49:53,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:49:53,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 14:49:53,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 14:49:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:49:53,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-05-02 14:49:53,452 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 39 [2021-05-02 14:49:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:53,453 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-05-02 14:49:53,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:53,453 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-05-02 14:49:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 14:49:53,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:53,454 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:53,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:53,673 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:53,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:53,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2021-05-02 14:49:53,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:53,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024709744] [2021-05-02 14:49:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:53,682 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:53,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251455818] [2021-05-02 14:49:53,682 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 14:49:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:53,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:49:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:53,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:49:53,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:53,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024709744] [2021-05-02 14:49:53,916 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:53,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251455818] [2021-05-02 14:49:53,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251455818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:53,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:53,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:49:53,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663852670] [2021-05-02 14:49:53,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:49:53,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:53,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:49:53,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:49:53,918 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:49:53,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:53,992 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-05-02 14:49:53,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:49:53,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 14:49:53,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:53,993 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:49:53,993 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 14:49:53,994 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:53,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 14:49:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 14:49:54,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:49:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-05-02 14:49:54,010 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-05-02 14:49:54,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:54,010 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-05-02 14:49:54,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:49:54,010 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-05-02 14:49:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 14:49:54,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:54,011 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:54,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:49:54,224 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:54,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:54,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2021-05-02 14:49:54,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:54,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759302296] [2021-05-02 14:49:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:54,233 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:54,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808108092] [2021-05-02 14:49:54,233 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 14:49:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:54,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:49:54,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:54,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,438 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 14:49:54,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:54,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759302296] [2021-05-02 14:49:54,438 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:54,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808108092] [2021-05-02 14:49:54,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808108092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:54,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:54,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:49:54,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156205380] [2021-05-02 14:49:54,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:49:54,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:54,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:49:54,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:49:54,439 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (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 14:49:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:54,568 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2021-05-02 14:49:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:49:54,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (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 46 [2021-05-02 14:49:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:54,569 INFO L225 Difference]: With dead ends: 62 [2021-05-02 14:49:54,569 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 14:49:54,569 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:54,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 14:49:54,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 14:49:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:49:54,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-05-02 14:49:54,575 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 46 [2021-05-02 14:49:54,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:54,575 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-05-02 14:49:54,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (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 14:49:54,575 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-05-02 14:49:54,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 14:49:54,576 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:54,576 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:54,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:54,803 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:54,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:54,804 INFO L82 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2021-05-02 14:49:54,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:54,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458712058] [2021-05-02 14:49:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:54,811 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:54,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935656284] [2021-05-02 14:49:54,811 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 14:49:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:54,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 14:49:54,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:54,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,975 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 14:49:54,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:54,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458712058] [2021-05-02 14:49:54,976 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:54,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935656284] [2021-05-02 14:49:54,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935656284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:54,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:54,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:49:54,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13888616] [2021-05-02 14:49:54,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:49:54,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:54,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:49:54,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:54,977 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 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 14:49:57,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:57,142 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-05-02 14:49:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:49:57,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 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 51 [2021-05-02 14:49:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:57,143 INFO L225 Difference]: With dead ends: 66 [2021-05-02 14:49:57,143 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 14:49:57,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:49:57,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 14:49:57,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 14:49:57,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:49:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-05-02 14:49:57,149 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 51 [2021-05-02 14:49:57,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:57,149 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-05-02 14:49:57,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 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 14:49:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-05-02 14:49:57,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 14:49:57,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:57,150 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:57,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:57,365 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:57,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 1 times [2021-05-02 14:49:57,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:57,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024072274] [2021-05-02 14:49:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:57,372 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:57,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153161784] [2021-05-02 14:49:57,373 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 14:49:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:57,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:49:57,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:57,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 14:49:57,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:57,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024072274] [2021-05-02 14:49:57,518 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:57,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153161784] [2021-05-02 14:49:57,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153161784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:57,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:57,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:49:57,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463034771] [2021-05-02 14:49:57,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:49:57,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:57,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:49:57,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:49:57,519 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 14:49:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:57,624 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2021-05-02 14:49:57,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:49:57,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 59 [2021-05-02 14:49:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:57,626 INFO L225 Difference]: With dead ends: 96 [2021-05-02 14:49:57,626 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 14:49:57,626 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:57,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 14:49:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-05-02 14:49:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 14:49:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2021-05-02 14:49:57,635 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2021-05-02 14:49:57,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:57,635 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2021-05-02 14:49:57,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 14:49:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2021-05-02 14:49:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 14:49:57,636 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:57,636 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:57,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:49:57,851 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:57,851 INFO L82 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2021-05-02 14:49:57,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:57,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177054175] [2021-05-02 14:49:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:57,868 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:57,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804276831] [2021-05-02 14:49:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:57,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:49:57,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:57,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 14:49:58,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:58,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177054175] [2021-05-02 14:49:58,038 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:58,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804276831] [2021-05-02 14:49:58,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804276831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:58,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:58,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:49:58,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147801446] [2021-05-02 14:49:58,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:49:58,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:58,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:49:58,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:49:58,039 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:49:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:58,079 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2021-05-02 14:49:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:49:58,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2021-05-02 14:49:58,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:58,080 INFO L225 Difference]: With dead ends: 107 [2021-05-02 14:49:58,080 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 14:49:58,080 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:49:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 14:49:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-02 14:49:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 14:49:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-02 14:49:58,088 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 60 [2021-05-02 14:49:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:58,089 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-02 14:49:58,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:49:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-02 14:49:58,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:49:58,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:58,105 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:58,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:58,321 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:58,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:58,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2021-05-02 14:49:58,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:58,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075027973] [2021-05-02 14:49:58,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:58,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:58,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629247618] [2021-05-02 14:49:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:58,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:49:58,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:58,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 14:49:58,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:58,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075027973] [2021-05-02 14:49:58,486 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:58,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629247618] [2021-05-02 14:49:58,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629247618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:58,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:58,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:49:58,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785887187] [2021-05-02 14:49:58,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:49:58,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:58,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:49:58,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:49:58,487 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:49:58,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:58,646 INFO L93 Difference]: Finished difference Result 178 states and 253 transitions. [2021-05-02 14:49:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:49:58,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 14:49:58,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:58,647 INFO L225 Difference]: With dead ends: 178 [2021-05-02 14:49:58,647 INFO L226 Difference]: Without dead ends: 170 [2021-05-02 14:49:58,648 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:49:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-02 14:49:58,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2021-05-02 14:49:58,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 91 states have internal predecessors, (112), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-02 14:49:58,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2021-05-02 14:49:58,658 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 61 [2021-05-02 14:49:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:58,659 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2021-05-02 14:49:58,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:49:58,659 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2021-05-02 14:49:58,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 14:49:58,659 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:58,659 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:58,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:58,878 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:58,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 1 times [2021-05-02 14:49:58,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:58,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602182783] [2021-05-02 14:49:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:58,884 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:58,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639126338] [2021-05-02 14:49:58,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:58,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:49:58,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:58,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:58,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 14:49:59,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:59,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602182783] [2021-05-02 14:49:59,009 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:59,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639126338] [2021-05-02 14:49:59,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639126338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:59,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:59,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:49:59,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264938733] [2021-05-02 14:49:59,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:49:59,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:59,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:49:59,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:49:59,010 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:49:59,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:59,054 INFO L93 Difference]: Finished difference Result 175 states and 244 transitions. [2021-05-02 14:49:59,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:49:59,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-02 14:49:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:59,058 INFO L225 Difference]: With dead ends: 175 [2021-05-02 14:49:59,058 INFO L226 Difference]: Without dead ends: 142 [2021-05-02 14:49:59,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:49:59,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-02 14:49:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-02 14:49:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 91 states have internal predecessors, (111), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-02 14:49:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2021-05-02 14:49:59,077 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 62 [2021-05-02 14:49:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:59,077 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2021-05-02 14:49:59,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:49:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2021-05-02 14:49:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 14:49:59,078 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:59,078 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:59,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:49:59,294 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:59,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:59,294 INFO L82 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 1 times [2021-05-02 14:49:59,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:59,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151279969] [2021-05-02 14:49:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:59,300 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:59,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047817042] [2021-05-02 14:49:59,301 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 14:49:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:59,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:49:59,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:59,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 14:49:59,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:59,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151279969] [2021-05-02 14:49:59,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:59,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047817042] [2021-05-02 14:49:59,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047817042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:59,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:59,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:49:59,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417417185] [2021-05-02 14:49:59,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:49:59,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:59,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:49:59,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:49:59,461 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:49:59,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:59,527 INFO L93 Difference]: Finished difference Result 245 states and 345 transitions. [2021-05-02 14:49:59,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:49:59,528 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-02 14:49:59,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:59,529 INFO L225 Difference]: With dead ends: 245 [2021-05-02 14:49:59,529 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 14:49:59,530 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:49:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 14:49:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-05-02 14:49:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 108 states have internal predecessors, (130), 46 states have call successors, (46), 16 states have call predecessors, (46), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 14:49:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2021-05-02 14:49:59,561 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 66 [2021-05-02 14:49:59,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:59,562 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2021-05-02 14:49:59,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:49:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2021-05-02 14:49:59,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 14:49:59,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:59,562 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:59,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:49:59,778 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:59,779 INFO L82 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2021-05-02 14:49:59,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:59,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177685518] [2021-05-02 14:49:59,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:59,784 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:59,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714524554] [2021-05-02 14:49:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:59,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 14:49:59,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:59,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:59,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-02 14:50:00,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:00,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177685518] [2021-05-02 14:50:00,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:00,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714524554] [2021-05-02 14:50:00,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714524554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:00,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:00,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:50:00,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143031907] [2021-05-02 14:50:00,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:50:00,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:00,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:50:00,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:50:00,045 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 14:50:00,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:00,212 INFO L93 Difference]: Finished difference Result 202 states and 269 transitions. [2021-05-02 14:50:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:50:00,212 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 68 [2021-05-02 14:50:00,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:00,213 INFO L225 Difference]: With dead ends: 202 [2021-05-02 14:50:00,213 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 14:50:00,214 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:50:00,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 14:50:00,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2021-05-02 14:50:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 126 states have (on average 1.2619047619047619) internal successors, (159), 133 states have internal predecessors, (159), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (50), 45 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 14:50:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 262 transitions. [2021-05-02 14:50:00,226 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 262 transitions. Word has length 68 [2021-05-02 14:50:00,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:00,226 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 262 transitions. [2021-05-02 14:50:00,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 14:50:00,226 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 262 transitions. [2021-05-02 14:50:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 14:50:00,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:00,227 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:00,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:50:00,442 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:00,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:00,443 INFO L82 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 2 times [2021-05-02 14:50:00,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:00,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876908482] [2021-05-02 14:50:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:00,448 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:00,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588488333] [2021-05-02 14:50:00,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:00,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:50:00,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:00,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 14:50:00,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:00,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 14:50:00,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:00,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876908482] [2021-05-02 14:50:00,684 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:00,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588488333] [2021-05-02 14:50:00,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588488333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:00,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:00,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:50:00,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207818067] [2021-05-02 14:50:00,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:50:00,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:00,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:50:00,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:50:00,685 INFO L87 Difference]: Start difference. First operand 196 states and 262 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:50:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:00,841 INFO L93 Difference]: Finished difference Result 224 states and 301 transitions. [2021-05-02 14:50:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:50:00,841 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2021-05-02 14:50:00,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:00,842 INFO L225 Difference]: With dead ends: 224 [2021-05-02 14:50:00,842 INFO L226 Difference]: Without dead ends: 222 [2021-05-02 14:50:00,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:50:00,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-02 14:50:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2021-05-02 14:50:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 138 states have (on average 1.2681159420289856) internal successors, (175), 146 states have internal predecessors, (175), 62 states have call successors, (62), 19 states have call predecessors, (62), 18 states have return successors, (59), 53 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 14:50:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 296 transitions. [2021-05-02 14:50:00,855 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 296 transitions. Word has length 73 [2021-05-02 14:50:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:00,855 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 296 transitions. [2021-05-02 14:50:00,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:50:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 296 transitions. [2021-05-02 14:50:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 14:50:00,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:00,856 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:01,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:01,071 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:01,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:01,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 3 times [2021-05-02 14:50:01,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:01,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530296822] [2021-05-02 14:50:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:01,077 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:01,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399569660] [2021-05-02 14:50:01,077 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 14:50:01,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:50:01,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:01,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 14:50:01,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:01,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 14:50:01,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:01,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530296822] [2021-05-02 14:50:01,420 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:01,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399569660] [2021-05-02 14:50:01,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399569660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:01,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:01,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:50:01,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630206869] [2021-05-02 14:50:01,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:50:01,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:01,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:50:01,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:50:01,422 INFO L87 Difference]: Start difference. First operand 219 states and 296 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:50:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:01,711 INFO L93 Difference]: Finished difference Result 228 states and 304 transitions. [2021-05-02 14:50:01,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:50:01,712 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2021-05-02 14:50:01,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:01,713 INFO L225 Difference]: With dead ends: 228 [2021-05-02 14:50:01,713 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 14:50:01,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:50:01,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 14:50:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2021-05-02 14:50:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 141 states have (on average 1.2624113475177305) internal successors, (178), 149 states have internal predecessors, (178), 62 states have call successors, (62), 20 states have call predecessors, (62), 19 states have return successors, (59), 53 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 14:50:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 299 transitions. [2021-05-02 14:50:01,726 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 299 transitions. Word has length 78 [2021-05-02 14:50:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:01,726 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 299 transitions. [2021-05-02 14:50:01,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:50:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 299 transitions. [2021-05-02 14:50:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 14:50:01,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:01,727 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:01,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:50:01,942 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:01,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:01,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 2 times [2021-05-02 14:50:01,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:01,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835773578] [2021-05-02 14:50:01,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:01,948 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:01,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256491575] [2021-05-02 14:50:01,948 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 14:50:01,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:50:01,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:01,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 14:50:01,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:02,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 41 proven. 36 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-02 14:50:02,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:02,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835773578] [2021-05-02 14:50:02,233 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:02,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256491575] [2021-05-02 14:50:02,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256491575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:02,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:02,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:50:02,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069661899] [2021-05-02 14:50:02,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:50:02,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:02,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:50:02,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:50:02,234 INFO L87 Difference]: Start difference. First operand 223 states and 299 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:50:02,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:02,500 INFO L93 Difference]: Finished difference Result 237 states and 317 transitions. [2021-05-02 14:50:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:50:02,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 82 [2021-05-02 14:50:02,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:02,502 INFO L225 Difference]: With dead ends: 237 [2021-05-02 14:50:02,502 INFO L226 Difference]: Without dead ends: 235 [2021-05-02 14:50:02,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:50:02,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-02 14:50:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 228. [2021-05-02 14:50:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 144 states have (on average 1.2569444444444444) internal successors, (181), 153 states have internal predecessors, (181), 63 states have call successors, (63), 21 states have call predecessors, (63), 20 states have return successors, (60), 53 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:50:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 304 transitions. [2021-05-02 14:50:02,515 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 304 transitions. Word has length 82 [2021-05-02 14:50:02,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:02,515 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 304 transitions. [2021-05-02 14:50:02,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:50:02,515 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 304 transitions. [2021-05-02 14:50:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 14:50:02,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:02,516 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:02,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:02,731 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:02,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:02,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 1 times [2021-05-02 14:50:02,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:02,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736414533] [2021-05-02 14:50:02,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:02,736 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:02,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688290194] [2021-05-02 14:50:02,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:02,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:50:02,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:02,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 14:50:02,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:02,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736414533] [2021-05-02 14:50:02,889 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:02,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688290194] [2021-05-02 14:50:02,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688290194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:02,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:02,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:50:02,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535590029] [2021-05-02 14:50:02,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:50:02,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:02,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:50:02,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:50:02,890 INFO L87 Difference]: Start difference. First operand 228 states and 304 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:50:02,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:02,957 INFO L93 Difference]: Finished difference Result 238 states and 314 transitions. [2021-05-02 14:50:02,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:50:02,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2021-05-02 14:50:02,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:02,958 INFO L225 Difference]: With dead ends: 238 [2021-05-02 14:50:02,958 INFO L226 Difference]: Without dead ends: 231 [2021-05-02 14:50:02,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:50:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-02 14:50:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-05-02 14:50:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 147 states have (on average 1.251700680272109) internal successors, (184), 156 states have internal predecessors, (184), 63 states have call successors, (63), 21 states have call predecessors, (63), 20 states have return successors, (60), 53 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:50:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 307 transitions. [2021-05-02 14:50:02,971 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 307 transitions. Word has length 83 [2021-05-02 14:50:02,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:02,971 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 307 transitions. [2021-05-02 14:50:02,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:50:02,971 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 307 transitions. [2021-05-02 14:50:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 14:50:02,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:02,972 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:03,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 14:50:03,187 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:03,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2021-05-02 14:50:03,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:03,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022039137] [2021-05-02 14:50:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:03,192 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:03,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784989787] [2021-05-02 14:50:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:03,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 14:50:03,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:03,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-05-02 14:50:03,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:03,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022039137] [2021-05-02 14:50:03,504 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:03,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784989787] [2021-05-02 14:50:03,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784989787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:03,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:03,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:50:03,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552341866] [2021-05-02 14:50:03,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:50:03,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:03,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:50:03,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:50:03,505 INFO L87 Difference]: Start difference. First operand 231 states and 307 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:50:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:03,872 INFO L93 Difference]: Finished difference Result 263 states and 352 transitions. [2021-05-02 14:50:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:50:03,872 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 84 [2021-05-02 14:50:03,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:03,873 INFO L225 Difference]: With dead ends: 263 [2021-05-02 14:50:03,873 INFO L226 Difference]: Without dead ends: 260 [2021-05-02 14:50:03,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:50:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-02 14:50:03,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2021-05-02 14:50:03,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 162 states have (on average 1.2592592592592593) internal successors, (204), 172 states have internal predecessors, (204), 72 states have call successors, (72), 23 states have call predecessors, (72), 22 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 14:50:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 345 transitions. [2021-05-02 14:50:03,886 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 345 transitions. Word has length 84 [2021-05-02 14:50:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:03,886 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 345 transitions. [2021-05-02 14:50:03,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:50:03,886 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 345 transitions. [2021-05-02 14:50:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:50:03,887 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:03,887 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:04,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 14:50:04,105 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:04,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:04,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 2 times [2021-05-02 14:50:04,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:04,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612757744] [2021-05-02 14:50:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:04,110 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:04,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769581341] [2021-05-02 14:50:04,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:04,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:50:04,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:04,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:50:04,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:04,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 14:50:04,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:04,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612757744] [2021-05-02 14:50:04,279 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:04,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769581341] [2021-05-02 14:50:04,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769581341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:04,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:04,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:50:04,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227990691] [2021-05-02 14:50:04,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:50:04,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:04,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:50:04,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:50:04,280 INFO L87 Difference]: Start difference. First operand 257 states and 345 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:50:04,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:04,368 INFO L93 Difference]: Finished difference Result 299 states and 386 transitions. [2021-05-02 14:50:04,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:50:04,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 87 [2021-05-02 14:50:04,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:04,369 INFO L225 Difference]: With dead ends: 299 [2021-05-02 14:50:04,369 INFO L226 Difference]: Without dead ends: 292 [2021-05-02 14:50:04,369 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:50:04,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-02 14:50:04,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-05-02 14:50:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 187 states have (on average 1.2299465240641712) internal successors, (230), 196 states have internal predecessors, (230), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:50:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 377 transitions. [2021-05-02 14:50:04,383 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 377 transitions. Word has length 87 [2021-05-02 14:50:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:04,383 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 377 transitions. [2021-05-02 14:50:04,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:50:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 377 transitions. [2021-05-02 14:50:04,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 14:50:04,383 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:04,384 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:04,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 14:50:04,599 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:04,599 INFO L82 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 1 times [2021-05-02 14:50:04,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:04,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591884970] [2021-05-02 14:50:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:04,604 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:04,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323963855] [2021-05-02 14:50:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:04,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:50:04,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:04,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 14:50:04,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:04,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591884970] [2021-05-02 14:50:04,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:04,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323963855] [2021-05-02 14:50:04,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323963855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:04,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:04,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:50:04,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959773153] [2021-05-02 14:50:04,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:50:04,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:04,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:50:04,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:50:04,819 INFO L87 Difference]: Start difference. First operand 291 states and 377 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:50:04,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:04,933 INFO L93 Difference]: Finished difference Result 398 states and 543 transitions. [2021-05-02 14:50:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:50:04,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2021-05-02 14:50:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:04,935 INFO L225 Difference]: With dead ends: 398 [2021-05-02 14:50:04,935 INFO L226 Difference]: Without dead ends: 293 [2021-05-02 14:50:04,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:50:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-02 14:50:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-05-02 14:50:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 189 states have (on average 1.216931216931217) internal successors, (230), 198 states have internal predecessors, (230), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:50:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 377 transitions. [2021-05-02 14:50:04,952 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 377 transitions. Word has length 89 [2021-05-02 14:50:04,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:04,953 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 377 transitions. [2021-05-02 14:50:04,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:50:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 377 transitions. [2021-05-02 14:50:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 14:50:04,953 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:04,953 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:05,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 14:50:05,171 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:05,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:05,172 INFO L82 PathProgramCache]: Analyzing trace with hash 325787368, now seen corresponding path program 2 times [2021-05-02 14:50:05,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:05,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068483028] [2021-05-02 14:50:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:05,181 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:05,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032759432] [2021-05-02 14:50:05,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:05,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:50:05,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:50:05,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:05,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-05-02 14:50:05,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:05,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068483028] [2021-05-02 14:50:05,349 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:05,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032759432] [2021-05-02 14:50:05,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032759432] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:50:05,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:50:05,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:50:05,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359776503] [2021-05-02 14:50:05,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:50:05,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:05,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:50:05,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:50:05,350 INFO L87 Difference]: Start difference. First operand 293 states and 377 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 14:50:05,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:05,404 INFO L93 Difference]: Finished difference Result 451 states and 628 transitions. [2021-05-02 14:50:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:50:05,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2021-05-02 14:50:05,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:05,405 INFO L225 Difference]: With dead ends: 451 [2021-05-02 14:50:05,405 INFO L226 Difference]: Without dead ends: 343 [2021-05-02 14:50:05,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:50:05,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-05-02 14:50:05,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 310. [2021-05-02 14:50:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 200 states have (on average 1.225) internal successors, (245), 208 states have internal predecessors, (245), 81 states have call successors, (81), 29 states have call predecessors, (81), 28 states have return successors, (78), 72 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 14:50:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 404 transitions. [2021-05-02 14:50:05,420 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 404 transitions. Word has length 93 [2021-05-02 14:50:05,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:05,420 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 404 transitions. [2021-05-02 14:50:05,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 14:50:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 404 transitions. [2021-05-02 14:50:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 14:50:05,421 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:05,421 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:05,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 14:50:05,637 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:05,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2021-05-02 14:50:05,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:05,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541005430] [2021-05-02 14:50:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:05,641 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:05,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438941712] [2021-05-02 14:50:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:05,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-02 14:50:05,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:05,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:05,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 53 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-02 14:50:06,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:06,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541005430] [2021-05-02 14:50:06,474 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:06,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438941712] [2021-05-02 14:50:06,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438941712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:06,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:06,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:50:06,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263421035] [2021-05-02 14:50:06,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:50:06,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:06,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:50:06,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:50:06,475 INFO L87 Difference]: Start difference. First operand 310 states and 404 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 14:50:10,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:10,404 INFO L93 Difference]: Finished difference Result 320 states and 413 transitions. [2021-05-02 14:50:10,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:50:10,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 101 [2021-05-02 14:50:10,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:10,405 INFO L225 Difference]: With dead ends: 320 [2021-05-02 14:50:10,406 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 14:50:10,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 390.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:50:10,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 14:50:10,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2021-05-02 14:50:10,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 203 states have (on average 1.2216748768472907) internal successors, (248), 211 states have internal predecessors, (248), 81 states have call successors, (81), 30 states have call predecessors, (81), 29 states have return successors, (78), 72 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 14:50:10,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 407 transitions. [2021-05-02 14:50:10,420 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 407 transitions. Word has length 101 [2021-05-02 14:50:10,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:10,421 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 407 transitions. [2021-05-02 14:50:10,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 14:50:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 407 transitions. [2021-05-02 14:50:10,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 14:50:10,421 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:10,421 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:10,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:10,636 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:10,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:10,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 3 times [2021-05-02 14:50:10,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:10,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319859736] [2021-05-02 14:50:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:10,641 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:10,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017445862] [2021-05-02 14:50:10,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:10,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:50:10,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:10,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:50:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:10,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:12,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-05-02 14:50:13,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:13,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319859736] [2021-05-02 14:50:13,235 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:13,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017445862] [2021-05-02 14:50:13,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017445862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:13,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:13,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:50:13,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977097144] [2021-05-02 14:50:13,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:50:13,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:13,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:50:13,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=203, Unknown=1, NotChecked=0, Total=240 [2021-05-02 14:50:13,236 INFO L87 Difference]: Start difference. First operand 314 states and 407 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:50:19,514 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 31 DAG size of output: 16 [2021-05-02 14:50:23,830 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 14:50:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:24,536 INFO L93 Difference]: Finished difference Result 328 states and 425 transitions. [2021-05-02 14:50:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:50:24,536 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-02 14:50:24,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:24,537 INFO L225 Difference]: With dead ends: 328 [2021-05-02 14:50:24,537 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 14:50:24,538 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 6089.8ms TimeCoverageRelationStatistics Valid=68, Invalid=393, Unknown=1, NotChecked=0, Total=462 [2021-05-02 14:50:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 14:50:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 319. [2021-05-02 14:50:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 206 states have (on average 1.2184466019417475) internal successors, (251), 215 states have internal predecessors, (251), 82 states have call successors, (82), 31 states have call predecessors, (82), 30 states have return successors, (79), 72 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 14:50:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 412 transitions. [2021-05-02 14:50:24,553 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 412 transitions. Word has length 105 [2021-05-02 14:50:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:24,553 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 412 transitions. [2021-05-02 14:50:24,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:50:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 412 transitions. [2021-05-02 14:50:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 14:50:24,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:24,554 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:24,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 14:50:24,770 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:24,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:24,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 2 times [2021-05-02 14:50:24,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:24,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144555983] [2021-05-02 14:50:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:24,775 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:24,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305605607] [2021-05-02 14:50:24,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:24,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:50:24,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:24,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 14:50:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:24,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:24,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:24,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:24,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:24,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:24,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:24,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:24,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:24,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:24,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 69 proven. 69 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-05-02 14:50:25,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144555983] [2021-05-02 14:50:25,378 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305605607] [2021-05-02 14:50:25,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305605607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:25,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:25,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:50:25,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744144192] [2021-05-02 14:50:25,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:50:25,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:25,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:50:25,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:50:25,381 INFO L87 Difference]: Start difference. First operand 319 states and 412 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 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 14:50:25,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:25,963 INFO L93 Difference]: Finished difference Result 353 states and 458 transitions. [2021-05-02 14:50:25,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:50:25,964 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 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 107 [2021-05-02 14:50:25,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:25,965 INFO L225 Difference]: With dead ends: 353 [2021-05-02 14:50:25,965 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 14:50:25,966 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 392.5ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-05-02 14:50:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 14:50:25,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 345. [2021-05-02 14:50:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 221 states have (on average 1.2217194570135748) internal successors, (270), 231 states have internal predecessors, (270), 91 states have call successors, (91), 33 states have call predecessors, (91), 32 states have return successors, (88), 80 states have call predecessors, (88), 88 states have call successors, (88) [2021-05-02 14:50:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 449 transitions. [2021-05-02 14:50:25,989 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 449 transitions. Word has length 107 [2021-05-02 14:50:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:25,989 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 449 transitions. [2021-05-02 14:50:25,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 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 14:50:25,990 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 449 transitions. [2021-05-02 14:50:25,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 14:50:25,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:25,991 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:26,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:26,206 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:26,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:26,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2134846746, now seen corresponding path program 2 times [2021-05-02 14:50:26,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:26,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275279168] [2021-05-02 14:50:26,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:26,213 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:26,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085921546] [2021-05-02 14:50:26,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:26,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:50:26,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:26,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 14:50:26,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:26,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 47 proven. 52 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-05-02 14:50:26,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:26,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275279168] [2021-05-02 14:50:26,538 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:26,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085921546] [2021-05-02 14:50:26,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085921546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:26,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:26,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:50:26,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617313266] [2021-05-02 14:50:26,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:50:26,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:26,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:50:26,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:50:26,539 INFO L87 Difference]: Start difference. First operand 345 states and 449 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:50:27,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:27,053 INFO L93 Difference]: Finished difference Result 408 states and 545 transitions. [2021-05-02 14:50:27,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:50:27,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2021-05-02 14:50:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:27,055 INFO L225 Difference]: With dead ends: 408 [2021-05-02 14:50:27,055 INFO L226 Difference]: Without dead ends: 406 [2021-05-02 14:50:27,055 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-05-02 14:50:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-02 14:50:27,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 367. [2021-05-02 14:50:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 233 states have (on average 1.2274678111587982) internal successors, (286), 243 states have internal predecessors, (286), 99 states have call successors, (99), 35 states have call predecessors, (99), 34 states have return successors, (96), 88 states have call predecessors, (96), 96 states have call successors, (96) [2021-05-02 14:50:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 481 transitions. [2021-05-02 14:50:27,074 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 481 transitions. Word has length 109 [2021-05-02 14:50:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:27,074 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 481 transitions. [2021-05-02 14:50:27,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:50:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 481 transitions. [2021-05-02 14:50:27,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 14:50:27,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:27,075 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:27,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 14:50:27,291 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:27,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:27,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 2 times [2021-05-02 14:50:27,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:27,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833248380] [2021-05-02 14:50:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:27,299 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:27,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719794317] [2021-05-02 14:50:27,299 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:27,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:50:27,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:27,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:50:27,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:27,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 221 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 14:50:27,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:27,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833248380] [2021-05-02 14:50:27,529 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:27,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719794317] [2021-05-02 14:50:27,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719794317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:27,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:27,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:50:27,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744564279] [2021-05-02 14:50:27,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:50:27,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:27,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:50:27,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:50:27,530 INFO L87 Difference]: Start difference. First operand 367 states and 481 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:50:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:27,655 INFO L93 Difference]: Finished difference Result 421 states and 531 transitions. [2021-05-02 14:50:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:50:27,656 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 110 [2021-05-02 14:50:27,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:27,657 INFO L225 Difference]: With dead ends: 421 [2021-05-02 14:50:27,657 INFO L226 Difference]: Without dead ends: 414 [2021-05-02 14:50:27,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:50:27,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-02 14:50:27,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 413. [2021-05-02 14:50:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 267 states have (on average 1.202247191011236) internal successors, (321), 276 states have internal predecessors, (321), 102 states have call successors, (102), 44 states have call predecessors, (102), 43 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-02 14:50:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 522 transitions. [2021-05-02 14:50:27,676 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 522 transitions. Word has length 110 [2021-05-02 14:50:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:27,676 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 522 transitions. [2021-05-02 14:50:27,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:50:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 522 transitions. [2021-05-02 14:50:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 14:50:27,677 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:27,677 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:27,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 14:50:27,892 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:27,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:27,893 INFO L82 PathProgramCache]: Analyzing trace with hash -289933735, now seen corresponding path program 3 times [2021-05-02 14:50:27,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:27,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776312794] [2021-05-02 14:50:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:27,899 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:27,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224639431] [2021-05-02 14:50:27,899 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:27,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:50:27,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:27,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:50:27,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:28,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-02 14:50:28,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:28,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776312794] [2021-05-02 14:50:28,107 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:28,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224639431] [2021-05-02 14:50:28,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224639431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:28,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:28,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:50:28,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820540157] [2021-05-02 14:50:28,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:50:28,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:28,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:50:28,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:50:28,108 INFO L87 Difference]: Start difference. First operand 413 states and 522 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-02 14:50:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:28,353 INFO L93 Difference]: Finished difference Result 583 states and 799 transitions. [2021-05-02 14:50:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:50:28,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 111 [2021-05-02 14:50:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:28,356 INFO L225 Difference]: With dead ends: 583 [2021-05-02 14:50:28,356 INFO L226 Difference]: Without dead ends: 574 [2021-05-02 14:50:28,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:50:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-05-02 14:50:28,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 457. [2021-05-02 14:50:28,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 297 states have (on average 1.2222222222222223) internal successors, (363), 304 states have internal predecessors, (363), 116 states have call successors, (116), 44 states have call predecessors, (116), 43 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-02 14:50:28,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 592 transitions. [2021-05-02 14:50:28,379 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 592 transitions. Word has length 111 [2021-05-02 14:50:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:28,379 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 592 transitions. [2021-05-02 14:50:28,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-02 14:50:28,379 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 592 transitions. [2021-05-02 14:50:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 14:50:28,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:28,379 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:28,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 14:50:28,595 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:28,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1282766646, now seen corresponding path program 2 times [2021-05-02 14:50:28,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:28,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551190179] [2021-05-02 14:50:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:28,602 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:28,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549539875] [2021-05-02 14:50:28,603 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:28,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:50:28,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:28,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:50:28,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:28,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 222 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 14:50:28,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:28,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551190179] [2021-05-02 14:50:28,834 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:28,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549539875] [2021-05-02 14:50:28,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549539875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:28,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:28,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:50:28,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062361453] [2021-05-02 14:50:28,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:50:28,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:28,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:50:28,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:50:28,834 INFO L87 Difference]: Start difference. First operand 457 states and 592 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:50:28,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:28,974 INFO L93 Difference]: Finished difference Result 635 states and 863 transitions. [2021-05-02 14:50:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:50:28,975 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 112 [2021-05-02 14:50:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:28,976 INFO L225 Difference]: With dead ends: 635 [2021-05-02 14:50:28,976 INFO L226 Difference]: Without dead ends: 459 [2021-05-02 14:50:28,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:50:28,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-05-02 14:50:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2021-05-02 14:50:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 299 states have (on average 1.2107023411371238) internal successors, (362), 306 states have internal predecessors, (362), 116 states have call successors, (116), 44 states have call predecessors, (116), 43 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-02 14:50:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 591 transitions. [2021-05-02 14:50:28,998 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 591 transitions. Word has length 112 [2021-05-02 14:50:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:28,998 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 591 transitions. [2021-05-02 14:50:28,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:50:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 591 transitions. [2021-05-02 14:50:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 14:50:28,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:28,999 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:29,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 14:50:29,213 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:29,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:29,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 3 times [2021-05-02 14:50:29,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:29,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581348376] [2021-05-02 14:50:29,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:29,218 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:29,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424214500] [2021-05-02 14:50:29,218 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:29,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:50:29,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:29,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:50:29,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:29,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 14:50:29,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:29,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581348376] [2021-05-02 14:50:29,448 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:29,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424214500] [2021-05-02 14:50:29,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424214500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:29,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:29,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:50:29,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600200092] [2021-05-02 14:50:29,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:50:29,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:50:29,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:50:29,449 INFO L87 Difference]: Start difference. First operand 459 states and 591 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:50:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:29,625 INFO L93 Difference]: Finished difference Result 709 states and 937 transitions. [2021-05-02 14:50:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:50:29,625 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2021-05-02 14:50:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:29,627 INFO L225 Difference]: With dead ends: 709 [2021-05-02 14:50:29,627 INFO L226 Difference]: Without dead ends: 533 [2021-05-02 14:50:29,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:50:29,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-05-02 14:50:29,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 523. [2021-05-02 14:50:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 344 states have (on average 1.191860465116279) internal successors, (410), 351 states have internal predecessors, (410), 124 states have call successors, (124), 55 states have call predecessors, (124), 54 states have return successors, (120), 116 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 14:50:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 654 transitions. [2021-05-02 14:50:29,653 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 654 transitions. Word has length 116 [2021-05-02 14:50:29,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:29,653 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 654 transitions. [2021-05-02 14:50:29,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:50:29,653 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 654 transitions. [2021-05-02 14:50:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 14:50:29,654 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:29,654 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:29,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 14:50:29,869 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:29,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:29,870 INFO L82 PathProgramCache]: Analyzing trace with hash 992936989, now seen corresponding path program 3 times [2021-05-02 14:50:29,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:29,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468839390] [2021-05-02 14:50:29,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:29,875 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:29,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001926327] [2021-05-02 14:50:29,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:29,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:50:29,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:29,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 14:50:29,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:29,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:29,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 106 proven. 32 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-02 14:50:30,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:30,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468839390] [2021-05-02 14:50:30,329 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:30,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001926327] [2021-05-02 14:50:30,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001926327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:30,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:30,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:50:30,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439023744] [2021-05-02 14:50:30,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:50:30,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:30,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:50:30,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:50:30,330 INFO L87 Difference]: Start difference. First operand 523 states and 654 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:50:38,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:38,694 INFO L93 Difference]: Finished difference Result 586 states and 744 transitions. [2021-05-02 14:50:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:50:38,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 124 [2021-05-02 14:50:38,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:38,696 INFO L225 Difference]: With dead ends: 586 [2021-05-02 14:50:38,696 INFO L226 Difference]: Without dead ends: 584 [2021-05-02 14:50:38,697 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:50:38,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-05-02 14:50:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 560. [2021-05-02 14:50:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 370 states have (on average 1.2027027027027026) internal successors, (445), 378 states have internal predecessors, (445), 133 states have call successors, (133), 57 states have call predecessors, (133), 56 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-02 14:50:38,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 707 transitions. [2021-05-02 14:50:38,742 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 707 transitions. Word has length 124 [2021-05-02 14:50:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:38,742 INFO L480 AbstractCegarLoop]: Abstraction has 560 states and 707 transitions. [2021-05-02 14:50:38,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:50:38,742 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 707 transitions. [2021-05-02 14:50:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 14:50:38,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:38,744 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:38,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:38,959 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:38,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:38,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1110867224, now seen corresponding path program 4 times [2021-05-02 14:50:38,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:38,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069740769] [2021-05-02 14:50:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:38,965 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:38,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291402467] [2021-05-02 14:50:38,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:39,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:50:39,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:39,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-02 14:50:39,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:39,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 83 proven. 135 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-05-02 14:50:39,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:39,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069740769] [2021-05-02 14:50:39,643 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:39,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291402467] [2021-05-02 14:50:39,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291402467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:39,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:39,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 14:50:39,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125766427] [2021-05-02 14:50:39,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 14:50:39,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:39,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 14:50:39,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:50:39,644 INFO L87 Difference]: Start difference. First operand 560 states and 707 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-05-02 14:50:40,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:40,357 INFO L93 Difference]: Finished difference Result 603 states and 762 transitions. [2021-05-02 14:50:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:50:40,357 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 123 [2021-05-02 14:50:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:40,359 INFO L225 Difference]: With dead ends: 603 [2021-05-02 14:50:40,359 INFO L226 Difference]: Without dead ends: 601 [2021-05-02 14:50:40,359 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 541.2ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-05-02 14:50:40,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-05-02 14:50:40,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 595. [2021-05-02 14:50:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 389 states have (on average 1.2030848329048842) internal successors, (468), 397 states have internal predecessors, (468), 145 states have call successors, (145), 61 states have call predecessors, (145), 60 states have return successors, (141), 136 states have call predecessors, (141), 141 states have call successors, (141) [2021-05-02 14:50:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 754 transitions. [2021-05-02 14:50:40,390 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 754 transitions. Word has length 123 [2021-05-02 14:50:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:40,391 INFO L480 AbstractCegarLoop]: Abstraction has 595 states and 754 transitions. [2021-05-02 14:50:40,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-05-02 14:50:40,391 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 754 transitions. [2021-05-02 14:50:40,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 14:50:40,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:40,391 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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 14:50:40,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:40,607 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:40,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:40,607 INFO L82 PathProgramCache]: Analyzing trace with hash -454805304, now seen corresponding path program 4 times [2021-05-02 14:50:40,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:40,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801252718] [2021-05-02 14:50:40,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:40,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:40,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20512056] [2021-05-02 14:50:40,616 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:40,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:50:40,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:40,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 14:50:40,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:40,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:40,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:41,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:41,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:41,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:41,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:41,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:41,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:41,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:41,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:41,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:41,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 92 proven. 123 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2021-05-02 14:50:41,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:41,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801252718] [2021-05-02 14:50:41,764 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:41,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20512056] [2021-05-02 14:50:41,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20512056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:41,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:41,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:50:41,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375035102] [2021-05-02 14:50:41,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:50:41,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:41,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:50:41,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:50:41,765 INFO L87 Difference]: Start difference. First operand 595 states and 754 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 14:50:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:47,210 INFO L93 Difference]: Finished difference Result 603 states and 762 transitions. [2021-05-02 14:50:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:50:47,211 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 128 [2021-05-02 14:50:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:47,213 INFO L225 Difference]: With dead ends: 603 [2021-05-02 14:50:47,213 INFO L226 Difference]: Without dead ends: 599 [2021-05-02 14:50:47,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 999.6ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-05-02 14:50:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-05-02 14:50:47,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 597. [2021-05-02 14:50:47,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 391 states have (on average 1.1994884910485935) internal successors, (469), 398 states have internal predecessors, (469), 145 states have call successors, (145), 62 states have call predecessors, (145), 60 states have return successors, (141), 136 states have call predecessors, (141), 141 states have call successors, (141) [2021-05-02 14:50:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 755 transitions. [2021-05-02 14:50:47,244 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 755 transitions. Word has length 128 [2021-05-02 14:50:47,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:47,245 INFO L480 AbstractCegarLoop]: Abstraction has 597 states and 755 transitions. [2021-05-02 14:50:47,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 14:50:47,245 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 755 transitions. [2021-05-02 14:50:47,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 14:50:47,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:47,245 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:47,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-02 14:50:47,461 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:47,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:47,462 INFO L82 PathProgramCache]: Analyzing trace with hash -270396677, now seen corresponding path program 5 times [2021-05-02 14:50:47,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:47,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119405039] [2021-05-02 14:50:47,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:47,466 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:47,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392688450] [2021-05-02 14:50:47,466 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true