/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/cohendiv-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:07:05,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:07:05,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:07:05,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:07:05,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:07:05,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:07:05,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:07:05,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:07:05,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:07:05,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:07:05,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:07:05,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:07:05,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:07:05,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:07:05,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:07:05,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:07:05,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:07:05,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:07:05,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:07:05,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:07:05,966 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 14:07:06,007 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:07:06,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:07:06,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:07:06,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:07:06,011 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:07:06,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:07:06,011 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:07:06,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:07:06,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:07:06,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:07:06,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:07:06,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:07:06,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:07:06,012 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:07:06,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:07:06,013 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:07:06,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:07:06,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:07:06,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:07:06,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:07:06,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:07:06,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:07:06,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:07:06,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:07:06,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:07:06,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:07:06,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:07:06,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:07:06,014 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:07:06,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:07:06,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:07:06,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:07:06,310 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:07:06,311 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:07:06,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2021-05-02 14:07:06,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a54ac748/7acd33eb4baf44db8a98befaf74d9fd7/FLAG3c39e12ac [2021-05-02 14:07:06,973 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:07:06,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2021-05-02 14:07:06,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a54ac748/7acd33eb4baf44db8a98befaf74d9fd7/FLAG3c39e12ac [2021-05-02 14:07:07,394 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a54ac748/7acd33eb4baf44db8a98befaf74d9fd7 [2021-05-02 14:07:07,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:07:07,401 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:07:07,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:07:07,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:07:07,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:07:07,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:07:07" (1/1) ... [2021-05-02 14:07:07,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f14d83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:07, skipping insertion in model container [2021-05-02 14:07:07,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:07:07" (1/1) ... [2021-05-02 14:07:07,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:07:07,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:07:07,524 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/cohendiv-ll_unwindbound100.c[576,589] [2021-05-02 14:07:07,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:07:07,540 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:07:07,548 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/cohendiv-ll_unwindbound100.c[576,589] [2021-05-02 14:07:07,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:07:07,596 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:07:07,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:07 WrapperNode [2021-05-02 14:07:07,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:07:07,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:07:07,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:07:07,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:07:07,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:07" (1/1) ... [2021-05-02 14:07:07,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:07" (1/1) ... [2021-05-02 14:07:07,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:07" (1/1) ... [2021-05-02 14:07:07,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:07" (1/1) ... [2021-05-02 14:07:07,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:07" (1/1) ... [2021-05-02 14:07:07,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:07" (1/1) ... [2021-05-02 14:07:07,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:07" (1/1) ... [2021-05-02 14:07:07,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:07:07,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:07:07,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:07:07,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:07:07,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:07" (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 14:07:07,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:07:07,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:07:07,724 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:07:07,724 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:07:07,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:07:07,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:07:07,725 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:07:07,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:07:07,725 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:07:07,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:07:07,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:07:07,726 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:07:07,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:07:07,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:07:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:07:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:07:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:07:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:07:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:07:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:07:07,981 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:07:07,981 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:07:07,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:07:07 BoogieIcfgContainer [2021-05-02 14:07:07,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:07:07,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:07:07,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:07:07,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:07:07,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:07:07" (1/3) ... [2021-05-02 14:07:07,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a25df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:07:07, skipping insertion in model container [2021-05-02 14:07:07,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:07" (2/3) ... [2021-05-02 14:07:07,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a25df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:07:07, skipping insertion in model container [2021-05-02 14:07:07,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:07:07" (3/3) ... [2021-05-02 14:07:07,987 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound100.c [2021-05-02 14:07:08,001 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:07:08,004 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:07:08,015 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:07:08,040 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:07:08,040 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:07:08,041 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:07:08,041 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:07:08,041 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:07:08,041 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:07:08,041 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:07:08,041 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:07:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:07:08,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 14:07:08,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:08,057 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:08,058 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:08,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:08,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1588022502, now seen corresponding path program 1 times [2021-05-02 14:07:08,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:08,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316780654] [2021-05-02 14:07:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:08,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:07:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:08,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:07:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:07:08,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:08,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316780654] [2021-05-02 14:07:08,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316780654] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:08,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:08,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:07:08,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182912689] [2021-05-02 14:07:08,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:07:08,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:08,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:07:08,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:07:08,323 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:07:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:08,412 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2021-05-02 14:07:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:07:08,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 14:07:08,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:08,434 INFO L225 Difference]: With dead ends: 68 [2021-05-02 14:07:08,434 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 14:07:08,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:07:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 14:07:08,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 14:07:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:07:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-02 14:07:08,465 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-02 14:07:08,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:08,466 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-02 14:07:08,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:07:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-02 14:07:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:07:08,466 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:08,467 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:08,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:07:08,467 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:08,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:08,468 INFO L82 PathProgramCache]: Analyzing trace with hash 766070672, now seen corresponding path program 1 times [2021-05-02 14:07:08,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:08,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383991646] [2021-05-02 14:07:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:08,480 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:08,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230039963] [2021-05-02 14:07:08,480 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 14:07:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:08,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:07:08,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:08,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:07:08,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:08,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383991646] [2021-05-02 14:07:08,613 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:08,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230039963] [2021-05-02 14:07:08,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230039963] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:08,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:08,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:07:08,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070122117] [2021-05-02 14:07:08,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 14:07:08,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:08,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 14:07:08,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:07:08,615 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:07:08,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:08,629 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 14:07:08,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 14:07:08,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 14:07:08,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:08,631 INFO L225 Difference]: With dead ends: 42 [2021-05-02 14:07:08,631 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:07:08,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:07:08,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:07:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:07:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:07:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 14:07:08,638 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-02 14:07:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:08,638 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 14:07:08,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:07:08,639 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 14:07:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:07:08,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:08,639 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:08,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:07:08,853 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:08,854 INFO L82 PathProgramCache]: Analyzing trace with hash 767560222, now seen corresponding path program 1 times [2021-05-02 14:07:08,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:08,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140563640] [2021-05-02 14:07:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:08,865 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:08,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336165790] [2021-05-02 14:07:08,866 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 14:07:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:08,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:07:08,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:09,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:07:09,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:09,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140563640] [2021-05-02 14:07:09,065 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:09,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336165790] [2021-05-02 14:07:09,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336165790] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:09,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:09,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:07:09,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23681048] [2021-05-02 14:07:09,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:07:09,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:09,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:07:09,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:07:09,067 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:07:09,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:09,154 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-02 14:07:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:07:09,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 14:07:09,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:09,155 INFO L225 Difference]: With dead ends: 45 [2021-05-02 14:07:09,156 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 14:07:09,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 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 14:07:09,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 14:07:09,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 14:07:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:07:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 14:07:09,165 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-02 14:07:09,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:09,165 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 14:07:09,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:07:09,166 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 14:07:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:07:09,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:09,166 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:09,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:09,382 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:09,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:09,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1016228092, now seen corresponding path program 1 times [2021-05-02 14:07:09,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:09,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403173268] [2021-05-02 14:07:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:09,391 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:09,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893825586] [2021-05-02 14:07:09,391 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 14:07:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:09,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:07:09,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:09,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:07:09,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:09,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403173268] [2021-05-02 14:07:09,499 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:09,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893825586] [2021-05-02 14:07:09,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893825586] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:09,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:09,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:07:09,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393942531] [2021-05-02 14:07:09,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:07:09,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:09,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:07:09,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:07:09,500 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:07:09,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:09,571 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-05-02 14:07:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:07:09,571 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 14:07:09,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:09,572 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:07:09,572 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 14:07:09,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:07:09,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 14:07:09,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 14:07:09,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 14:07:09,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-02 14:07:09,579 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-02 14:07:09,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:09,579 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-02 14:07:09,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:07:09,580 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-02 14:07:09,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 14:07:09,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:09,580 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 14:07:09,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:09,812 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:09,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:09,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2019703110, now seen corresponding path program 1 times [2021-05-02 14:07:09,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:09,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426031170] [2021-05-02 14:07:09,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:09,821 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:09,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661861339] [2021-05-02 14:07:09,821 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 14:07:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:09,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:07:09,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:09,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:07:09,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:09,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426031170] [2021-05-02 14:07:09,955 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:09,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661861339] [2021-05-02 14:07:09,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661861339] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:09,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:09,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:07:09,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448110629] [2021-05-02 14:07:09,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:07:09,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:09,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:07:09,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:07:09,957 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:07:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:10,068 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2021-05-02 14:07:10,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:07:10,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-05-02 14:07:10,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:10,070 INFO L225 Difference]: With dead ends: 83 [2021-05-02 14:07:10,070 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 14:07:10,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:07:10,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 14:07:10,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-02 14:07:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:07:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-05-02 14:07:10,080 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2021-05-02 14:07:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:10,080 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-05-02 14:07:10,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:07:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-05-02 14:07:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:07:10,081 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:10,081 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-05-02 14:07:10,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:10,297 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:10,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:10,298 INFO L82 PathProgramCache]: Analyzing trace with hash 202176206, now seen corresponding path program 1 times [2021-05-02 14:07:10,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:10,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593832341] [2021-05-02 14:07:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:10,306 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:10,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643505017] [2021-05-02 14:07:10,306 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 14:07:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:10,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:07:10,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:10,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:07:10,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:10,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593832341] [2021-05-02 14:07:10,433 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:10,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643505017] [2021-05-02 14:07:10,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643505017] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:10,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:10,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:07:10,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209697422] [2021-05-02 14:07:10,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:07:10,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:10,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:07:10,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:07:10,435 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:07:10,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:10,461 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2021-05-02 14:07:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:07:10,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 14:07:10,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:10,463 INFO L225 Difference]: With dead ends: 113 [2021-05-02 14:07:10,463 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 14:07:10,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:07:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 14:07:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 14:07:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:07:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-05-02 14:07:10,471 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2021-05-02 14:07:10,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:10,472 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-05-02 14:07:10,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:07:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-05-02 14:07:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 14:07:10,472 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:10,473 INFO L523 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1] [2021-05-02 14:07:10,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:07:10,688 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:10,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:10,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1813008070, now seen corresponding path program 1 times [2021-05-02 14:07:10,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:10,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53482529] [2021-05-02 14:07:10,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:10,697 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:10,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872524470] [2021-05-02 14:07:10,697 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 14:07:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:10,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 14:07:10,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:10,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:07:10,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:10,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53482529] [2021-05-02 14:07:10,900 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:10,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872524470] [2021-05-02 14:07:10,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872524470] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:10,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:10,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:07:10,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167228016] [2021-05-02 14:07:10,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:07:10,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:10,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:07:10,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:07:10,901 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 14:07:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:10,989 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2021-05-02 14:07:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:07:10,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 14:07:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:11,002 INFO L225 Difference]: With dead ends: 84 [2021-05-02 14:07:11,002 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 14:07:11,003 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:07:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 14:07:11,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 14:07:11,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:07:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-05-02 14:07:11,010 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2021-05-02 14:07:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:11,010 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-05-02 14:07:11,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 14:07:11,011 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-05-02 14:07:11,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 14:07:11,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:11,011 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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 14:07:11,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:11,227 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:11,228 INFO L82 PathProgramCache]: Analyzing trace with hash -683043127, now seen corresponding path program 1 times [2021-05-02 14:07:11,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:11,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749312749] [2021-05-02 14:07:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:11,235 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:11,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139502174] [2021-05-02 14:07:11,235 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 14:07:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:11,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:07:11,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:11,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:07:11,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:11,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749312749] [2021-05-02 14:07:11,496 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:11,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139502174] [2021-05-02 14:07:11,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139502174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:11,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:11,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:07:11,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283460761] [2021-05-02 14:07:11,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:07:11,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:11,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:07:11,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:07:11,497 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:07:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:11,609 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2021-05-02 14:07:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:07:11,610 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-02 14:07:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:11,611 INFO L225 Difference]: With dead ends: 88 [2021-05-02 14:07:11,611 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 14:07:11,611 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:07:11,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 14:07:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-02 14:07:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:07:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-05-02 14:07:11,620 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2021-05-02 14:07:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:11,620 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-05-02 14:07:11,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:07:11,621 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-05-02 14:07:11,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 14:07:11,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:11,621 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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 14:07:11,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:11,831 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:11,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:11,845 INFO L82 PathProgramCache]: Analyzing trace with hash -589126939, now seen corresponding path program 1 times [2021-05-02 14:07:11,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:11,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933452051] [2021-05-02 14:07:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:11,854 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:11,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210494966] [2021-05-02 14:07:11,854 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 14:07:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:11,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:07:11,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:11,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:11,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:07:12,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:12,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933452051] [2021-05-02 14:07:12,045 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:12,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210494966] [2021-05-02 14:07:12,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210494966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:12,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:12,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:07:12,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661986444] [2021-05-02 14:07:12,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:07:12,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:12,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:07:12,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:07:12,048 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:07:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:12,092 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2021-05-02 14:07:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:07:12,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-02 14:07:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:12,093 INFO L225 Difference]: With dead ends: 115 [2021-05-02 14:07:12,093 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 14:07:12,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:07:12,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 14:07:12,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-05-02 14:07:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 14:07:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-05-02 14:07:12,115 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 50 [2021-05-02 14:07:12,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:12,115 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-05-02 14:07:12,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:07:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-05-02 14:07:12,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 14:07:12,116 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:12,116 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1] [2021-05-02 14:07:12,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:07:12,317 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:12,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:12,317 INFO L82 PathProgramCache]: Analyzing trace with hash -484699953, now seen corresponding path program 1 times [2021-05-02 14:07:12,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:12,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516648693] [2021-05-02 14:07:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:12,325 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:12,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217137187] [2021-05-02 14:07:12,325 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 14:07:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:12,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 14:07:12,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:12,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 14:07:12,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:12,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516648693] [2021-05-02 14:07:12,554 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:12,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217137187] [2021-05-02 14:07:12,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217137187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:12,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:12,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:07:12,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478907838] [2021-05-02 14:07:12,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:07:12,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:12,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:07:12,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:07:12,555 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:07:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:12,713 INFO L93 Difference]: Finished difference Result 159 states and 194 transitions. [2021-05-02 14:07:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:07:12,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2021-05-02 14:07:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:12,716 INFO L225 Difference]: With dead ends: 159 [2021-05-02 14:07:12,716 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 14:07:12,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:07:12,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 14:07:12,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-02 14:07:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 14:07:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2021-05-02 14:07:12,737 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 55 [2021-05-02 14:07:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:12,738 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2021-05-02 14:07:12,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:07:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2021-05-02 14:07:12,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 14:07:12,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:12,740 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1] [2021-05-02 14:07:12,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:12,953 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:12,953 INFO L82 PathProgramCache]: Analyzing trace with hash 765609565, now seen corresponding path program 1 times [2021-05-02 14:07:12,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:12,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235328552] [2021-05-02 14:07:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:12,965 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:12,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502945824] [2021-05-02 14:07:12,965 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 14:07:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:13,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:07:13,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:13,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:07:13,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:13,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235328552] [2021-05-02 14:07:13,168 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:13,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502945824] [2021-05-02 14:07:13,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502945824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:13,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:13,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:07:13,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687031640] [2021-05-02 14:07:13,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:07:13,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:13,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:07:13,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:07:13,170 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:07:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:13,216 INFO L93 Difference]: Finished difference Result 149 states and 181 transitions. [2021-05-02 14:07:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:07:13,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 58 [2021-05-02 14:07:13,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:13,220 INFO L225 Difference]: With dead ends: 149 [2021-05-02 14:07:13,220 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 14:07:13,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:07:13,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 14:07:13,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-02 14:07:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 70 states have internal predecessors, (78), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 14:07:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-05-02 14:07:13,229 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 58 [2021-05-02 14:07:13,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:13,229 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-05-02 14:07:13,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:07:13,230 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-05-02 14:07:13,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:07:13,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:13,233 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 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, 1, 1, 1, 1] [2021-05-02 14:07:13,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:13,450 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:13,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:13,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1361251212, now seen corresponding path program 1 times [2021-05-02 14:07:13,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:13,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529689280] [2021-05-02 14:07:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:13,463 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:13,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586943216] [2021-05-02 14:07:13,464 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 14:07:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:13,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:07:13,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:13,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 14:07:13,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:13,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529689280] [2021-05-02 14:07:13,656 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:13,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586943216] [2021-05-02 14:07:13,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586943216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:13,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:13,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:07:13,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429859428] [2021-05-02 14:07:13,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:07:13,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:13,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:07:13,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:07:13,657 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:07:13,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:13,716 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2021-05-02 14:07:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:07:13,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2021-05-02 14:07:13,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:13,717 INFO L225 Difference]: With dead ends: 135 [2021-05-02 14:07:13,718 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 14:07:13,718 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:07:13,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 14:07:13,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-05-02 14:07:13,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 84 states have internal predecessors, (92), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 14:07:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2021-05-02 14:07:13,725 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 74 [2021-05-02 14:07:13,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:13,726 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2021-05-02 14:07:13,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:07:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2021-05-02 14:07:13,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 14:07:13,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:13,727 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 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, 1, 1, 1] [2021-05-02 14:07:13,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:07:13,947 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:13,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:13,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1777426592, now seen corresponding path program 1 times [2021-05-02 14:07:13,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:13,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224373980] [2021-05-02 14:07:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:13,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:13,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407554370] [2021-05-02 14:07:13,953 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 14:07:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:14,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 14:07:14,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:14,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-05-02 14:07:14,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:14,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224373980] [2021-05-02 14:07:14,506 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:14,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407554370] [2021-05-02 14:07:14,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407554370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:14,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:14,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:07:14,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898880407] [2021-05-02 14:07:14,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:07:14,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:14,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:07:14,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:07:14,508 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 14:07:14,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:14,808 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2021-05-02 14:07:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:07:14,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 79 [2021-05-02 14:07:14,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:14,810 INFO L225 Difference]: With dead ends: 158 [2021-05-02 14:07:14,810 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 14:07:14,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:07:14,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 14:07:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-05-02 14:07:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 98 states have internal predecessors, (110), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 14:07:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 182 transitions. [2021-05-02 14:07:14,819 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 182 transitions. Word has length 79 [2021-05-02 14:07:14,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:14,819 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 182 transitions. [2021-05-02 14:07:14,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 14:07:14,820 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 182 transitions. [2021-05-02 14:07:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 14:07:14,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:14,820 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 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, 1, 1] [2021-05-02 14:07:15,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:07:15,036 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:15,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:15,037 INFO L82 PathProgramCache]: Analyzing trace with hash -554329876, now seen corresponding path program 2 times [2021-05-02 14:07:15,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:15,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068299413] [2021-05-02 14:07:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:15,042 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:15,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625564529] [2021-05-02 14:07:15,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:15,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:07:15,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:15,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:07:15,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:15,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 140 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 14:07:15,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:15,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068299413] [2021-05-02 14:07:15,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:15,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625564529] [2021-05-02 14:07:15,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625564529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:15,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:15,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:07:15,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827336162] [2021-05-02 14:07:15,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:07:15,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:15,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:07:15,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:07:15,211 INFO L87 Difference]: Start difference. First operand 151 states and 182 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:07:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:15,294 INFO L93 Difference]: Finished difference Result 197 states and 242 transitions. [2021-05-02 14:07:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:07:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 82 [2021-05-02 14:07:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:15,295 INFO L225 Difference]: With dead ends: 197 [2021-05-02 14:07:15,295 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 14:07:15,296 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:07:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 14:07:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-05-02 14:07:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.153061224489796) internal successors, (113), 100 states have internal predecessors, (113), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 14:07:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-05-02 14:07:15,304 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 82 [2021-05-02 14:07:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:15,304 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-05-02 14:07:15,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:07:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-05-02 14:07:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 14:07:15,305 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:15,305 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 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, 1, 1, 1] [2021-05-02 14:07:15,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:07:15,521 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:15,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1891783602, now seen corresponding path program 1 times [2021-05-02 14:07:15,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:15,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636473295] [2021-05-02 14:07:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:15,534 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:15,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437837973] [2021-05-02 14:07:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:15,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:07:15,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:15,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 27 proven. 191 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-02 14:07:15,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:15,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636473295] [2021-05-02 14:07:15,840 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:15,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437837973] [2021-05-02 14:07:15,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437837973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:15,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:15,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:07:15,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152357353] [2021-05-02 14:07:15,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:07:15,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:15,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:07:15,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:07:15,841 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:07:15,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:15,940 INFO L93 Difference]: Finished difference Result 223 states and 269 transitions. [2021-05-02 14:07:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:07:15,941 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 90 [2021-05-02 14:07:15,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:15,942 INFO L225 Difference]: With dead ends: 223 [2021-05-02 14:07:15,942 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 14:07:15,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:07:15,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 14:07:15,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2021-05-02 14:07:15,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.131578947368421) internal successors, (129), 116 states have internal predecessors, (129), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 14:07:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 209 transitions. [2021-05-02 14:07:15,951 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 209 transitions. Word has length 90 [2021-05-02 14:07:15,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:15,952 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 209 transitions. [2021-05-02 14:07:15,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:07:15,952 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 209 transitions. [2021-05-02 14:07:15,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 14:07:15,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:15,953 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:07:16,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:16,169 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:16,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:16,170 INFO L82 PathProgramCache]: Analyzing trace with hash -768653053, now seen corresponding path program 2 times [2021-05-02 14:07:16,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:16,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167109005] [2021-05-02 14:07:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:16,175 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:16,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272069559] [2021-05-02 14:07:16,176 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 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 14:07:16,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:07:16,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:16,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:07:16,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:16,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 26 proven. 270 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 14:07:16,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:16,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167109005] [2021-05-02 14:07:16,392 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:16,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272069559] [2021-05-02 14:07:16,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272069559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:16,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:16,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:07:16,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146998827] [2021-05-02 14:07:16,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:07:16,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:16,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:07:16,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:07:16,393 INFO L87 Difference]: Start difference. First operand 178 states and 209 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:07:16,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:16,498 INFO L93 Difference]: Finished difference Result 188 states and 219 transitions. [2021-05-02 14:07:16,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:07:16,499 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 98 [2021-05-02 14:07:16,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:16,500 INFO L225 Difference]: With dead ends: 188 [2021-05-02 14:07:16,500 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 14:07:16,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:07:16,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 14:07:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-05-02 14:07:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 119 states have internal predecessors, (132), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 14:07:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 212 transitions. [2021-05-02 14:07:16,509 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 212 transitions. Word has length 98 [2021-05-02 14:07:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:16,509 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 212 transitions. [2021-05-02 14:07:16,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:07:16,509 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 212 transitions. [2021-05-02 14:07:16,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 14:07:16,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:16,510 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 14:07:16,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:07:16,727 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:16,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:16,727 INFO L82 PathProgramCache]: Analyzing trace with hash -721908367, now seen corresponding path program 2 times [2021-05-02 14:07:16,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:16,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045603548] [2021-05-02 14:07:16,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:16,733 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:16,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338340451] [2021-05-02 14:07:16,733 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 14:07:16,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:07:16,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:16,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:07:16,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:16,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:16,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 51 proven. 40 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 14:07:17,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:17,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045603548] [2021-05-02 14:07:17,061 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:17,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338340451] [2021-05-02 14:07:17,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338340451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:17,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:17,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:07:17,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95908559] [2021-05-02 14:07:17,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:07:17,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:17,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:07:17,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:07:17,062 INFO L87 Difference]: Start difference. First operand 181 states and 212 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 14:07:17,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:17,398 INFO L93 Difference]: Finished difference Result 216 states and 258 transitions. [2021-05-02 14:07:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:07:17,399 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 103 [2021-05-02 14:07:17,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:17,400 INFO L225 Difference]: With dead ends: 216 [2021-05-02 14:07:17,400 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 14:07:17,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:07:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 14:07:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2021-05-02 14:07:17,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 134 states have (on average 1.1417910447761195) internal successors, (153), 136 states have internal predecessors, (153), 50 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 14:07:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 251 transitions. [2021-05-02 14:07:17,410 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 251 transitions. Word has length 103 [2021-05-02 14:07:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:17,410 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 251 transitions. [2021-05-02 14:07:17,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 14:07:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 251 transitions. [2021-05-02 14:07:17,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 14:07:17,411 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:17,411 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 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 14:07:17,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:07:17,630 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:17,630 INFO L82 PathProgramCache]: Analyzing trace with hash 447330249, now seen corresponding path program 3 times [2021-05-02 14:07:17,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:17,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809425564] [2021-05-02 14:07:17,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:17,636 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:17,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418194442] [2021-05-02 14:07:17,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:17,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 14:07:17,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:17,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 14:07:17,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:17,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 86 proven. 36 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-05-02 14:07:17,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:17,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809425564] [2021-05-02 14:07:17,975 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:17,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418194442] [2021-05-02 14:07:17,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418194442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:17,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:17,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:07:17,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071141894] [2021-05-02 14:07:17,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:07:17,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:17,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:07:17,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:07:17,977 INFO L87 Difference]: Start difference. First operand 210 states and 251 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:07:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:24,420 INFO L93 Difference]: Finished difference Result 295 states and 356 transitions. [2021-05-02 14:07:24,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:07:24,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 106 [2021-05-02 14:07:24,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:24,422 INFO L225 Difference]: With dead ends: 295 [2021-05-02 14:07:24,422 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 14:07:24,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:07:24,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 14:07:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 235. [2021-05-02 14:07:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.105263157894737) internal successors, (168), 155 states have internal predecessors, (168), 52 states have call successors, (52), 31 states have call predecessors, (52), 30 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 14:07:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 270 transitions. [2021-05-02 14:07:24,457 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 270 transitions. Word has length 106 [2021-05-02 14:07:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:24,457 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 270 transitions. [2021-05-02 14:07:24,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:07:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 270 transitions. [2021-05-02 14:07:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 14:07:24,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:24,458 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 14:07:24,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:07:24,674 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:24,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:24,674 INFO L82 PathProgramCache]: Analyzing trace with hash 436746049, now seen corresponding path program 2 times [2021-05-02 14:07:24,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:24,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772004472] [2021-05-02 14:07:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:24,686 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:24,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993599662] [2021-05-02 14:07:24,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:24,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:07:24,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:24,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 14:07:24,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:24,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 102 proven. 18 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-05-02 14:07:24,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:24,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772004472] [2021-05-02 14:07:24,975 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:24,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993599662] [2021-05-02 14:07:24,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993599662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:24,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:24,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:07:24,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034456288] [2021-05-02 14:07:24,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:07:24,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:24,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:07:24,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:07:24,977 INFO L87 Difference]: Start difference. First operand 235 states and 270 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:07:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:25,102 INFO L93 Difference]: Finished difference Result 346 states and 416 transitions. [2021-05-02 14:07:25,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:07:25,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 114 [2021-05-02 14:07:25,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:25,103 INFO L225 Difference]: With dead ends: 346 [2021-05-02 14:07:25,103 INFO L226 Difference]: Without dead ends: 247 [2021-05-02 14:07:25,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:07:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-02 14:07:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 227. [2021-05-02 14:07:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 146 states have (on average 1.13013698630137) internal successors, (165), 150 states have internal predecessors, (165), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 14:07:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 271 transitions. [2021-05-02 14:07:25,117 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 271 transitions. Word has length 114 [2021-05-02 14:07:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:25,117 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 271 transitions. [2021-05-02 14:07:25,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:07:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 271 transitions. [2021-05-02 14:07:25,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 14:07:25,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:25,118 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 14:07:25,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:25,333 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:25,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2077207105, now seen corresponding path program 3 times [2021-05-02 14:07:25,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:25,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063625472] [2021-05-02 14:07:25,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:25,343 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:25,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248748910] [2021-05-02 14:07:25,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:25,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:07:25,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:25,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 14:07:25,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:25,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 106 proven. 18 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-05-02 14:07:25,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:25,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063625472] [2021-05-02 14:07:25,637 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:25,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248748910] [2021-05-02 14:07:25,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248748910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:25,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:25,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:07:25,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989531918] [2021-05-02 14:07:25,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:07:25,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:25,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:07:25,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:07:25,638 INFO L87 Difference]: Start difference. First operand 227 states and 271 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:07:27,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:27,886 INFO L93 Difference]: Finished difference Result 238 states and 283 transitions. [2021-05-02 14:07:27,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:07:27,887 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 114 [2021-05-02 14:07:27,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:27,888 INFO L225 Difference]: With dead ends: 238 [2021-05-02 14:07:27,888 INFO L226 Difference]: Without dead ends: 227 [2021-05-02 14:07:27,888 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:07:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-02 14:07:27,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2021-05-02 14:07:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 143 states have (on average 1.118881118881119) internal successors, (160), 147 states have internal predecessors, (160), 54 states have call successors, (54), 28 states have call predecessors, (54), 27 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 14:07:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 265 transitions. [2021-05-02 14:07:27,898 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 265 transitions. Word has length 114 [2021-05-02 14:07:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:27,899 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 265 transitions. [2021-05-02 14:07:27,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:07:27,899 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 265 transitions. [2021-05-02 14:07:27,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 14:07:27,899 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:27,900 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2021-05-02 14:07:28,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:28,115 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:28,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:28,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1338024082, now seen corresponding path program 4 times [2021-05-02 14:07:28,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:28,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686682201] [2021-05-02 14:07:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:28,121 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:28,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411244760] [2021-05-02 14:07:28,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:28,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:07:28,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:28,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 14:07:28,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:28,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 45 proven. 81 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 14:07:28,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:28,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686682201] [2021-05-02 14:07:28,687 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:28,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411244760] [2021-05-02 14:07:28,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411244760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:28,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:28,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:07:28,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262971179] [2021-05-02 14:07:28,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:07:28,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:28,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:07:28,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:07:28,688 INFO L87 Difference]: Start difference. First operand 225 states and 265 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:07:29,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:29,181 INFO L93 Difference]: Finished difference Result 289 states and 347 transitions. [2021-05-02 14:07:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:07:29,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 122 [2021-05-02 14:07:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:29,182 INFO L225 Difference]: With dead ends: 289 [2021-05-02 14:07:29,182 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 14:07:29,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:07:29,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 14:07:29,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 277. [2021-05-02 14:07:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 174 states have (on average 1.132183908045977) internal successors, (197), 178 states have internal predecessors, (197), 70 states have call successors, (70), 33 states have call predecessors, (70), 32 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-02 14:07:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 334 transitions. [2021-05-02 14:07:29,195 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 334 transitions. Word has length 122 [2021-05-02 14:07:29,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:29,195 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 334 transitions. [2021-05-02 14:07:29,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 14:07:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 334 transitions. [2021-05-02 14:07:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 14:07:29,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:29,196 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 4, 4, 4, 4, 4, 4, 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] [2021-05-02 14:07:29,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 14:07:29,412 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:29,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:29,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1198671626, now seen corresponding path program 3 times [2021-05-02 14:07:29,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:29,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877243637] [2021-05-02 14:07:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:29,418 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:29,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261460974] [2021-05-02 14:07:29,418 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 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 14:07:29,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 14:07:29,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:29,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:07:29,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:31,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:31,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 100 proven. 12 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2021-05-02 14:07:31,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:31,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877243637] [2021-05-02 14:07:31,696 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:31,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261460974] [2021-05-02 14:07:31,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261460974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:31,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:31,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:07:31,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946439948] [2021-05-02 14:07:31,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:07:31,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:31,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:07:31,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-05-02 14:07:31,697 INFO L87 Difference]: Start difference. First operand 277 states and 334 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 14:07:37,810 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 14:08:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:08:06,237 INFO L93 Difference]: Finished difference Result 311 states and 383 transitions. [2021-05-02 14:08:06,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:08:06,238 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2021-05-02 14:08:06,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:08:06,239 INFO L225 Difference]: With dead ends: 311 [2021-05-02 14:08:06,239 INFO L226 Difference]: Without dead ends: 304 [2021-05-02 14:08:06,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8204.4ms TimeCoverageRelationStatistics Valid=40, Invalid=114, Unknown=2, NotChecked=0, Total=156 [2021-05-02 14:08:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-02 14:08:06,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 234. [2021-05-02 14:08:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 149 states have (on average 1.1073825503355705) internal successors, (165), 154 states have internal predecessors, (165), 55 states have call successors, (55), 30 states have call predecessors, (55), 29 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 14:08:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2021-05-02 14:08:06,253 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 130 [2021-05-02 14:08:06,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:08:06,254 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2021-05-02 14:08:06,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 14:08:06,254 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2021-05-02 14:08:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 14:08:06,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:08:06,255 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:08:06,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:08:06,461 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:08:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:08:06,461 INFO L82 PathProgramCache]: Analyzing trace with hash 518951120, now seen corresponding path program 4 times [2021-05-02 14:08:06,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:08:06,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175537499] [2021-05-02 14:08:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:08:06,466 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:08:06,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960991532] [2021-05-02 14:08:06,467 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 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 14:08:06,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:08:06,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:08:06,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 14:08:06,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:08:06,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:06,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:07,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:07,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:07,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:07,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 49 proven. 103 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-05-02 14:08:07,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:08:07,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175537499] [2021-05-02 14:08:07,133 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:08:07,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960991532] [2021-05-02 14:08:07,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960991532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:08:07,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:08:07,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 14:08:07,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034787118] [2021-05-02 14:08:07,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 14:08:07,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:08:07,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 14:08:07,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:08:07,135 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 14:08:07,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:08:07,793 INFO L93 Difference]: Finished difference Result 377 states and 444 transitions. [2021-05-02 14:08:07,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:08:07,794 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) Word has length 138 [2021-05-02 14:08:07,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:08:07,795 INFO L225 Difference]: With dead ends: 377 [2021-05-02 14:08:07,795 INFO L226 Difference]: Without dead ends: 274 [2021-05-02 14:08:07,796 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-02 14:08:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-02 14:08:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2021-05-02 14:08:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 174 states have (on average 1.0977011494252873) internal successors, (191), 179 states have internal predecessors, (191), 61 states have call successors, (61), 35 states have call predecessors, (61), 34 states have return successors, (58), 55 states have call predecessors, (58), 58 states have call successors, (58) [2021-05-02 14:08:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 310 transitions. [2021-05-02 14:08:07,811 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 310 transitions. Word has length 138 [2021-05-02 14:08:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:08:07,825 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 310 transitions. [2021-05-02 14:08:07,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 14:08:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 310 transitions. [2021-05-02 14:08:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 14:08:07,827 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:08:07,827 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-02 14:08:08,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:08:08,027 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:08:08,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:08:08,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1738824718, now seen corresponding path program 5 times [2021-05-02 14:08:08,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:08:08,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377384987] [2021-05-02 14:08:08,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:08:08,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:08:08,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327508555] [2021-05-02 14:08:08,033 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 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 14:08:08,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-02 14:08:08,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:08:08,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 14:08:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:08:08,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 481 proven. 1 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 14:08:08,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:08:08,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377384987] [2021-05-02 14:08:08,307 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:08:08,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327508555] [2021-05-02 14:08:08,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327508555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:08:08,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:08:08,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:08:08,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170153684] [2021-05-02 14:08:08,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:08:08,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:08:08,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:08:08,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:08:08,309 INFO L87 Difference]: Start difference. First operand 270 states and 310 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 14:08:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:08:08,353 INFO L93 Difference]: Finished difference Result 373 states and 431 transitions. [2021-05-02 14:08:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:08:08,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 154 [2021-05-02 14:08:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:08:08,355 INFO L225 Difference]: With dead ends: 373 [2021-05-02 14:08:08,355 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 14:08:08,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:08:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 14:08:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2021-05-02 14:08:08,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 124 states have (on average 1.0725806451612903) internal successors, (133), 129 states have internal predecessors, (133), 43 states have call successors, (43), 27 states have call predecessors, (43), 25 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 14:08:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2021-05-02 14:08:08,365 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 154 [2021-05-02 14:08:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:08:08,365 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2021-05-02 14:08:08,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 14:08:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2021-05-02 14:08:08,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 14:08:08,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:08:08,366 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:08:08,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 14:08:08,581 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:08:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:08:08,581 INFO L82 PathProgramCache]: Analyzing trace with hash -208343713, now seen corresponding path program 6 times [2021-05-02 14:08:08,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:08:08,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366806667] [2021-05-02 14:08:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:08:08,587 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:08:08,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271007389] [2021-05-02 14:08:08,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:08:08,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 14:08:08,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:08:08,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:08:08,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:08:08,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 51 proven. 983 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-05-02 14:08:08,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:08:08,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366806667] [2021-05-02 14:08:08,899 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:08:08,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271007389] [2021-05-02 14:08:08,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271007389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:08:08,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:08:08,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:08:08,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138097395] [2021-05-02 14:08:08,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:08:08,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:08:08,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:08:08,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:08:08,900 INFO L87 Difference]: Start difference. First operand 193 states and 214 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-02 14:08:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:08:09,077 INFO L93 Difference]: Finished difference Result 308 states and 339 transitions. [2021-05-02 14:08:09,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:08:09,077 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) Word has length 162 [2021-05-02 14:08:09,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:08:09,078 INFO L225 Difference]: With dead ends: 308 [2021-05-02 14:08:09,078 INFO L226 Difference]: Without dead ends: 294 [2021-05-02 14:08:09,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:08:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-02 14:08:09,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 286. [2021-05-02 14:08:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 185 states have (on average 1.0648648648648649) internal successors, (197), 191 states have internal predecessors, (197), 62 states have call successors, (62), 40 states have call predecessors, (62), 38 states have return successors, (57), 54 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 14:08:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 316 transitions. [2021-05-02 14:08:09,097 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 316 transitions. Word has length 162 [2021-05-02 14:08:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:08:09,097 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 316 transitions. [2021-05-02 14:08:09,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-02 14:08:09,098 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 316 transitions. [2021-05-02 14:08:09,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 14:08:09,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:08:09,099 INFO L523 BasicCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 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] [2021-05-02 14:08:09,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:08:09,317 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:08:09,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:08:09,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1040885898, now seen corresponding path program 5 times [2021-05-02 14:08:09,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:08:09,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704535184] [2021-05-02 14:08:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:08:09,330 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:08:09,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746648145] [2021-05-02 14:08:09,330 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 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 14:08:09,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-02 14:08:09,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:08:09,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:08:09,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:08:09,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 52 proven. 1284 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-02 14:08:09,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:08:09,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704535184] [2021-05-02 14:08:09,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:08:09,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746648145] [2021-05-02 14:08:09,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746648145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:08:09,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:08:09,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:08:09,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065433041] [2021-05-02 14:08:09,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:08:09,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:08:09,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:08:09,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:08:09,674 INFO L87 Difference]: Start difference. First operand 286 states and 316 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 14:08:09,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:08:09,886 INFO L93 Difference]: Finished difference Result 357 states and 397 transitions. [2021-05-02 14:08:09,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:08:09,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) Word has length 178 [2021-05-02 14:08:09,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:08:09,887 INFO L225 Difference]: With dead ends: 357 [2021-05-02 14:08:09,888 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 14:08:09,888 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:08:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 14:08:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 339. [2021-05-02 14:08:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 218 states have (on average 1.0642201834862386) internal successors, (232), 226 states have internal predecessors, (232), 76 states have call successors, (76), 46 states have call predecessors, (76), 44 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 14:08:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 379 transitions. [2021-05-02 14:08:09,905 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 379 transitions. Word has length 178 [2021-05-02 14:08:09,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:08:09,905 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 379 transitions. [2021-05-02 14:08:09,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 14:08:09,905 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 379 transitions. [2021-05-02 14:08:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 14:08:09,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:08:09,906 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 27, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:08:10,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 14:08:10,119 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:08:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:08:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2030603998, now seen corresponding path program 3 times [2021-05-02 14:08:10,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:08:10,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802715471] [2021-05-02 14:08:10,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:08:10,128 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:08:10,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8795220] [2021-05-02 14:08:10,128 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 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 14:08:10,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:08:10,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:08:10,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 14:08:10,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:08:10,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:10,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:10,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:10,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:10,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:10,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 243 proven. 94 refuted. 0 times theorem prover too weak. 1237 trivial. 0 not checked. [2021-05-02 14:08:10,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:08:10,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802715471] [2021-05-02 14:08:10,465 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:08:10,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8795220] [2021-05-02 14:08:10,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8795220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:08:10,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:08:10,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:08:10,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703974322] [2021-05-02 14:08:10,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:08:10,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:08:10,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:08:10,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:08:10,466 INFO L87 Difference]: Start difference. First operand 339 states and 379 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-02 14:08:18,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:08:18,750 INFO L93 Difference]: Finished difference Result 348 states and 387 transitions. [2021-05-02 14:08:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:08:18,751 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) Word has length 183 [2021-05-02 14:08:18,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:08:18,752 INFO L225 Difference]: With dead ends: 348 [2021-05-02 14:08:18,752 INFO L226 Difference]: Without dead ends: 331 [2021-05-02 14:08:18,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:08:18,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-02 14:08:18,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2021-05-02 14:08:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 209 states have (on average 1.0478468899521531) internal successors, (219), 214 states have internal predecessors, (219), 71 states have call successors, (71), 45 states have call predecessors, (71), 43 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 14:08:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 359 transitions. [2021-05-02 14:08:18,770 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 359 transitions. Word has length 183 [2021-05-02 14:08:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:08:18,770 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 359 transitions. [2021-05-02 14:08:18,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-02 14:08:18,770 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 359 transitions. [2021-05-02 14:08:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 14:08:18,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:08:18,771 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:08:18,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 14:08:18,971 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:08:18,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:08:18,972 INFO L82 PathProgramCache]: Analyzing trace with hash -108799506, now seen corresponding path program 7 times [2021-05-02 14:08:18,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:08:18,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24163011] [2021-05-02 14:08:18,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:08:18,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:08:18,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204913805] [2021-05-02 14:08:18,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:08:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:08:19,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:08:19,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:08:19,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 59 proven. 1391 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-05-02 14:08:19,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:08:19,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24163011] [2021-05-02 14:08:19,421 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:08:19,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204913805] [2021-05-02 14:08:19,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204913805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:08:19,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:08:19,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:08:19,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031954102] [2021-05-02 14:08:19,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:08:19,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:08:19,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:08:19,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:08:19,422 INFO L87 Difference]: Start difference. First operand 324 states and 359 transitions. Second operand has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) [2021-05-02 14:08:19,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:08:19,707 INFO L93 Difference]: Finished difference Result 346 states and 382 transitions. [2021-05-02 14:08:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 14:08:19,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) Word has length 186 [2021-05-02 14:08:19,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:08:19,709 INFO L225 Difference]: With dead ends: 346 [2021-05-02 14:08:19,709 INFO L226 Difference]: Without dead ends: 338 [2021-05-02 14:08:19,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:08:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-02 14:08:19,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 330. [2021-05-02 14:08:19,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 215 states have (on average 1.0465116279069768) internal successors, (225), 218 states have internal predecessors, (225), 71 states have call successors, (71), 45 states have call predecessors, (71), 43 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 14:08:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 365 transitions. [2021-05-02 14:08:19,725 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 365 transitions. Word has length 186 [2021-05-02 14:08:19,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:08:19,725 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 365 transitions. [2021-05-02 14:08:19,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) [2021-05-02 14:08:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 365 transitions. [2021-05-02 14:08:19,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 14:08:19,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:08:19,726 INFO L523 BasicCegarLoop]: trace histogram [31, 30, 30, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 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] [2021-05-02 14:08:19,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 14:08:19,942 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:08:19,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:08:19,943 INFO L82 PathProgramCache]: Analyzing trace with hash -747682299, now seen corresponding path program 6 times [2021-05-02 14:08:19,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:08:19,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281749753] [2021-05-02 14:08:19,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:08:19,950 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:08:19,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193239501] [2021-05-02 14:08:19,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:08:20,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-02 14:08:20,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:08:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 14:08:20,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:08:20,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:20,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:20,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:20,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:20,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:20,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:20,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:20,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 287 proven. 191 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2021-05-02 14:08:20,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:08:20,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281749753] [2021-05-02 14:08:20,415 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:08:20,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193239501] [2021-05-02 14:08:20,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193239501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:08:20,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:08:20,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:08:20,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450681690] [2021-05-02 14:08:20,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:08:20,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:08:20,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:08:20,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:08:20,416 INFO L87 Difference]: Start difference. First operand 330 states and 365 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-02 14:08:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:08:28,744 INFO L93 Difference]: Finished difference Result 355 states and 385 transitions. [2021-05-02 14:08:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:08:28,744 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) Word has length 202 [2021-05-02 14:08:28,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:08:28,746 INFO L225 Difference]: With dead ends: 355 [2021-05-02 14:08:28,746 INFO L226 Difference]: Without dead ends: 347 [2021-05-02 14:08:28,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:08:28,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-02 14:08:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 346. [2021-05-02 14:08:28,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 227 states have (on average 1.0352422907488987) internal successors, (235), 230 states have internal predecessors, (235), 71 states have call successors, (71), 49 states have call predecessors, (71), 47 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 14:08:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 375 transitions. [2021-05-02 14:08:28,763 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 375 transitions. Word has length 202 [2021-05-02 14:08:28,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:08:28,763 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 375 transitions. [2021-05-02 14:08:28,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-02 14:08:28,763 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 375 transitions. [2021-05-02 14:08:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 14:08:28,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:08:28,764 INFO L523 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:08:28,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 14:08:28,981 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:08:28,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:08:28,981 INFO L82 PathProgramCache]: Analyzing trace with hash -211170947, now seen corresponding path program 8 times [2021-05-02 14:08:28,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:08:28,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715160648] [2021-05-02 14:08:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:08:28,987 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:08:28,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650389571] [2021-05-02 14:08:28,987 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 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 14:08:29,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:08:29,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:08:29,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 14:08:29,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:08:29,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 214 proven. 146 refuted. 0 times theorem prover too weak. 1742 trivial. 0 not checked. [2021-05-02 14:08:29,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:08:29,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715160648] [2021-05-02 14:08:29,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:08:29,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650389571] [2021-05-02 14:08:29,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650389571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:08:29,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:08:29,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:08:29,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815307291] [2021-05-02 14:08:29,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:08:29,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:08:29,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:08:29,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:08:29,708 INFO L87 Difference]: Start difference. First operand 346 states and 375 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2021-05-02 14:08:30,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:08:30,292 INFO L93 Difference]: Finished difference Result 484 states and 555 transitions. [2021-05-02 14:08:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:08:30,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) Word has length 210 [2021-05-02 14:08:30,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:08:30,295 INFO L225 Difference]: With dead ends: 484 [2021-05-02 14:08:30,295 INFO L226 Difference]: Without dead ends: 424 [2021-05-02 14:08:30,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:08:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-02 14:08:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 390. [2021-05-02 14:08:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 250 states have (on average 1.056) internal successors, (264), 253 states have internal predecessors, (264), 92 states have call successors, (92), 49 states have call predecessors, (92), 47 states have return successors, (90), 87 states have call predecessors, (90), 90 states have call successors, (90) [2021-05-02 14:08:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 446 transitions. [2021-05-02 14:08:30,318 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 446 transitions. Word has length 210 [2021-05-02 14:08:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:08:30,319 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 446 transitions. [2021-05-02 14:08:30,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2021-05-02 14:08:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 446 transitions. [2021-05-02 14:08:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 14:08:30,320 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:08:30,320 INFO L523 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:08:30,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:08:30,536 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:08:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:08:30,536 INFO L82 PathProgramCache]: Analyzing trace with hash -614515587, now seen corresponding path program 9 times [2021-05-02 14:08:30,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:08:30,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847406881] [2021-05-02 14:08:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:08:30,544 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:08:30,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231848390] [2021-05-02 14:08:30,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:08:30,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 14:08:30,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:08:30,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 14:08:30,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:08:30,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:30,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:39,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:39,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:39,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:41,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 358 proven. 157 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2021-05-02 14:08:43,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:08:43,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847406881] [2021-05-02 14:08:43,441 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:08:43,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231848390] [2021-05-02 14:08:43,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231848390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:08:43,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:08:43,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:08:43,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345638039] [2021-05-02 14:08:43,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:08:43,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:08:43,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:08:43,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=121, Unknown=4, NotChecked=0, Total=156 [2021-05-02 14:08:43,443 INFO L87 Difference]: Start difference. First operand 390 states and 446 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 14:09:08,186 WARN L205 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-05-02 14:10:20,868 WARN L205 SmtUtils]: Spent 38.29 s on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-05-02 14:11:00,791 WARN L205 SmtUtils]: Spent 33.65 s on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-02 14:11:43,361 WARN L205 SmtUtils]: Spent 33.62 s on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-02 14:12:40,222 WARN L205 SmtUtils]: Spent 40.60 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-02 14:13:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:13:01,884 INFO L93 Difference]: Finished difference Result 524 states and 649 transitions. [2021-05-02 14:13:01,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:13:01,886 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 210 [2021-05-02 14:13:01,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:13:01,889 INFO L225 Difference]: With dead ends: 524 [2021-05-02 14:13:01,889 INFO L226 Difference]: Without dead ends: 516 [2021-05-02 14:13:01,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 199531.1ms TimeCoverageRelationStatistics Valid=117, Invalid=413, Unknown=22, NotChecked=0, Total=552 [2021-05-02 14:13:01,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-02 14:13:01,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 436. [2021-05-02 14:13:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 273 states have (on average 1.0622710622710623) internal successors, (290), 277 states have internal predecessors, (290), 113 states have call successors, (113), 51 states have call predecessors, (113), 49 states have return successors, (111), 107 states have call predecessors, (111), 111 states have call successors, (111) [2021-05-02 14:13:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 514 transitions. [2021-05-02 14:13:01,960 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 514 transitions. Word has length 210 [2021-05-02 14:13:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:13:01,960 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 514 transitions. [2021-05-02 14:13:01,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 14:13:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 514 transitions. [2021-05-02 14:13:01,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-02 14:13:01,961 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:13:01,962 INFO L523 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 4, 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] [2021-05-02 14:13:02,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:13:02,175 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:13:02,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:13:02,175 INFO L82 PathProgramCache]: Analyzing trace with hash 418243538, now seen corresponding path program 10 times [2021-05-02 14:13:02,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:13:02,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924680588] [2021-05-02 14:13:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:13:02,181 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:13:02,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606450990] [2021-05-02 14:13:02,181 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 14:13:02,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:13:02,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:13:02,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 14:13:02,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:13:02,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:02,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 83 proven. 332 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2021-05-02 14:13:03,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:13:03,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924680588] [2021-05-02 14:13:03,750 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:13:03,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606450990] [2021-05-02 14:13:03,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606450990] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:13:03,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:13:03,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 14:13:03,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439449209] [2021-05-02 14:13:03,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 14:13:03,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:13:03,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 14:13:03,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-05-02 14:13:03,752 INFO L87 Difference]: Start difference. First operand 436 states and 514 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) [2021-05-02 14:13:05,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:13:05,334 INFO L93 Difference]: Finished difference Result 560 states and 648 transitions. [2021-05-02 14:13:05,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 14:13:05,335 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) Word has length 242 [2021-05-02 14:13:05,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:13:05,336 INFO L225 Difference]: With dead ends: 560 [2021-05-02 14:13:05,336 INFO L226 Difference]: Without dead ends: 394 [2021-05-02 14:13:05,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 831.6ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-05-02 14:13:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-02 14:13:05,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2021-05-02 14:13:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 247 states have (on average 1.0647773279352226) internal successors, (263), 250 states have internal predecessors, (263), 101 states have call successors, (101), 47 states have call predecessors, (101), 45 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-02 14:13:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 463 transitions. [2021-05-02 14:13:05,363 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 463 transitions. Word has length 242 [2021-05-02 14:13:05,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:13:05,363 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 463 transitions. [2021-05-02 14:13:05,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) [2021-05-02 14:13:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 463 transitions. [2021-05-02 14:13:05,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 14:13:05,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:13:05,364 INFO L523 BasicCegarLoop]: trace histogram [41, 40, 40, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 4, 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] [2021-05-02 14:13:05,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 14:13:05,580 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:13:05,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:13:05,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1458326881, now seen corresponding path program 11 times [2021-05-02 14:13:05,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:13:05,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622358477] [2021-05-02 14:13:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:13:05,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:13:05,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019194592] [2021-05-02 14:13:05,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:13:05,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 14:13:05,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:13:05,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 14:13:05,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:13:05,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:05,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:13:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3500 backedges. 88 proven. 3208 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-02 14:13:06,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:13:06,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622358477] [2021-05-02 14:13:06,466 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:13:06,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019194592] [2021-05-02 14:13:06,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019194592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:13:06,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:13:06,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:13:06,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258951021] [2021-05-02 14:13:06,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:13:06,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:13:06,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:13:06,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:13:06,468 INFO L87 Difference]: Start difference. First operand 394 states and 463 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (44), 15 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) [2021-05-02 14:13:07,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:13:07,550 INFO L93 Difference]: Finished difference Result 749 states and 885 transitions. [2021-05-02 14:13:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 14:13:07,551 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (44), 15 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) Word has length 266 [2021-05-02 14:13:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:13:07,553 INFO L225 Difference]: With dead ends: 749 [2021-05-02 14:13:07,554 INFO L226 Difference]: Without dead ends: 741 [2021-05-02 14:13:07,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 504.0ms TimeCoverageRelationStatistics Valid=261, Invalid=441, Unknown=0, NotChecked=0, Total=702 [2021-05-02 14:13:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-05-02 14:13:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 705. [2021-05-02 14:13:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 440 states have (on average 1.059090909090909) internal successors, (466), 448 states have internal predecessors, (466), 188 states have call successors, (188), 78 states have call predecessors, (188), 76 states have return successors, (186), 178 states have call predecessors, (186), 186 states have call successors, (186) [2021-05-02 14:13:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 840 transitions. [2021-05-02 14:13:07,601 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 840 transitions. Word has length 266 [2021-05-02 14:13:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:13:07,601 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 840 transitions. [2021-05-02 14:13:07,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (44), 15 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) [2021-05-02 14:13:07,601 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 840 transitions. [2021-05-02 14:13:07,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-05-02 14:13:07,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:13:07,603 INFO L523 BasicCegarLoop]: trace histogram [45, 44, 44, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 4, 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] [2021-05-02 14:13:07,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 14:13:07,812 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:13:07,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:13:07,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1390685200, now seen corresponding path program 12 times [2021-05-02 14:13:07,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:13:07,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113450344] [2021-05-02 14:13:07,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:13:07,832 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:13:07,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067567757] [2021-05-02 14:13:07,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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