/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/ps6-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:19:08,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:19:08,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:19:08,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 17:19:08,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 17:19:08,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 17:19:08,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 17:19:08,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 17:19:08,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 17:19:08,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 17:19:08,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 17:19:08,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 17:19:08,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:19:08,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:19:08,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:19:08,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:19:08,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:19:08,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:19:08,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:19:08,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:19:08,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:19:08,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:19:08,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:19:08,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:19:08,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:19:08,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:19:08,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:19:08,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:19:08,713 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 17:19:08,752 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:19:08,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:19:08,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 17:19:08,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 17:19:08,756 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 17:19:08,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:19:08,756 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:19:08,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:19:08,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:19:08,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:19:08,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:19:08,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:19:08,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:19:08,758 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:19:08,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:19:08,759 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:19:08,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:19:08,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:19:08,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:19:08,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:19:08,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:19:08,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:19:08,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 17:19:08,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 17:19:08,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:19:08,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 17:19:08,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 17:19:08,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 17:19:08,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:19:09,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:19:09,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:19:09,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:19:09,139 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:19:09,140 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:19:09,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound20.c [2021-05-02 17:19:09,209 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/932a582cf/0cb73f4d63644b13b8914ca5903c97f9/FLAG009dea3fd [2021-05-02 17:19:09,589 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:19:09,590 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound20.c [2021-05-02 17:19:09,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/932a582cf/0cb73f4d63644b13b8914ca5903c97f9/FLAG009dea3fd [2021-05-02 17:19:09,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/932a582cf/0cb73f4d63644b13b8914ca5903c97f9 [2021-05-02 17:19:09,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:19:09,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 17:19:09,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:19:09,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:19:09,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:19:09,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:19:09" (1/1) ... [2021-05-02 17:19:09,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@268c0807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:09, skipping insertion in model container [2021-05-02 17:19:09,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:19:09" (1/1) ... [2021-05-02 17:19:09,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:19:09,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:19:09,813 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/ps6-ll_valuebound20.c[458,471] [2021-05-02 17:19:09,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:19:09,849 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:19:09,881 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/ps6-ll_valuebound20.c[458,471] [2021-05-02 17:19:09,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:19:09,935 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:19:09,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:09 WrapperNode [2021-05-02 17:19:09,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:19:09,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:19:09,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:19:09,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:19:09,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:09" (1/1) ... [2021-05-02 17:19:09,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:09" (1/1) ... [2021-05-02 17:19:09,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:09" (1/1) ... [2021-05-02 17:19:09,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:09" (1/1) ... [2021-05-02 17:19:09,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:09" (1/1) ... [2021-05-02 17:19:09,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:09" (1/1) ... [2021-05-02 17:19:09,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:09" (1/1) ... [2021-05-02 17:19:09,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:19:09,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:19:09,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:19:09,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:19:09,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:09" (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 17:19:10,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:19:10,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:19:10,071 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:19:10,072 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 17:19:10,072 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:19:10,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:19:10,072 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:19:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:19:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:19:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:19:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 17:19:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 17:19:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:19:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:19:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:19:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:19:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:19:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:19:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:19:10,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:19:10,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:19:10,321 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:19:10,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:19:10 BoogieIcfgContainer [2021-05-02 17:19:10,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:19:10,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:19:10,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:19:10,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:19:10,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:19:09" (1/3) ... [2021-05-02 17:19:10,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1bf3fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:19:10, skipping insertion in model container [2021-05-02 17:19:10,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:09" (2/3) ... [2021-05-02 17:19:10,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1bf3fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:19:10, skipping insertion in model container [2021-05-02 17:19:10,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:19:10" (3/3) ... [2021-05-02 17:19:10,330 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound20.c [2021-05-02 17:19:10,335 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:19:10,338 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:19:10,352 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:19:10,372 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:19:10,372 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 17:19:10,372 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 17:19:10,372 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:19:10,372 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:19:10,372 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:19:10,372 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:19:10,372 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:19:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 17:19:10,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:19:10,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:10,391 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:10,391 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:10,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:10,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2021-05-02 17:19:10,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:10,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210191804] [2021-05-02 17:19:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:19:10,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:19:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:19:10,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:19:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:19:10,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 17:19:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:19:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:19:10,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:10,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210191804] [2021-05-02 17:19:10,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210191804] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:19:10,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:19:10,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:19:10,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996790101] [2021-05-02 17:19:10,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:19:10,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:19:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:19:10,647 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:19:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:10,949 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-05-02 17:19:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:19:10,951 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 17:19:10,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:10,958 INFO L225 Difference]: With dead ends: 51 [2021-05-02 17:19:10,958 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 17:19:10,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:19:10,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 17:19:10,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 17:19:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 17:19:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 17:19:10,996 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-02 17:19:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:10,996 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 17:19:10,997 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:19:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 17:19:10,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:19:10,998 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:10,998 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:10,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:19:10,999 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:11,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:11,000 INFO L82 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2021-05-02 17:19:11,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:11,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275330341] [2021-05-02 17:19:11,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:11,018 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:11,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259763778] [2021-05-02 17:19:11,019 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 17:19:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:19:11,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:19:11,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:11,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:19:11,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:11,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275330341] [2021-05-02 17:19:11,333 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:11,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259763778] [2021-05-02 17:19:11,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259763778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:11,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:11,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 17:19:11,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155757569] [2021-05-02 17:19:11,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:19:11,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:11,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:19:11,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:19:11,339 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 17:19:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:11,661 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 17:19:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:19:11,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-02 17:19:11,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:11,663 INFO L225 Difference]: With dead ends: 35 [2021-05-02 17:19:11,663 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 17:19:11,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:19:11,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 17:19:11,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 17:19:11,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:19:11,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-02 17:19:11,674 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-02 17:19:11,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:11,674 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-02 17:19:11,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 17:19:11,674 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-02 17:19:11,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 17:19:11,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:11,675 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:11,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 17:19:11,901 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:11,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:11,902 INFO L82 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2021-05-02 17:19:11,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:11,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707754712] [2021-05-02 17:19:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:11,912 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:11,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140498412] [2021-05-02 17:19:11,913 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 17:19:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:19:11,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:19:11,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:12,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:19:12,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:12,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707754712] [2021-05-02 17:19:12,151 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:12,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140498412] [2021-05-02 17:19:12,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140498412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:12,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:12,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:19:12,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860003475] [2021-05-02 17:19:12,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:19:12,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:12,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:19:12,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:19:12,156 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 17:19:12,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:12,323 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-02 17:19:12,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:19:12,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 29 [2021-05-02 17:19:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:12,324 INFO L225 Difference]: With dead ends: 42 [2021-05-02 17:19:12,325 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 17:19:12,325 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:19:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 17:19:12,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 17:19:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 17:19:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-02 17:19:12,333 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-02 17:19:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:12,334 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-02 17:19:12,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 17:19:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-02 17:19:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 17:19:12,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:12,335 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:12,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:19:12,558 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:12,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:12,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1415216747, now seen corresponding path program 2 times [2021-05-02 17:19:12,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:12,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607235208] [2021-05-02 17:19:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:12,571 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:12,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535501477] [2021-05-02 17:19:12,572 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 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 17:19:12,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:19:12,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:19:12,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 17:19:12,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:12,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:12,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:12,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:12,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:12,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:12,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:12,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:12,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:12,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 17:19:12,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:12,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607235208] [2021-05-02 17:19:12,992 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:12,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535501477] [2021-05-02 17:19:12,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535501477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:12,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:12,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 17:19:12,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265733023] [2021-05-02 17:19:12,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 17:19:12,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:12,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 17:19:12,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:19:12,995 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:19:15,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:15,889 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-05-02 17:19:15,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 17:19:15,890 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 17:19:15,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:15,891 INFO L225 Difference]: With dead ends: 55 [2021-05-02 17:19:15,891 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 17:19:15,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:19:15,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 17:19:15,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-02 17:19:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:19:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-05-02 17:19:15,910 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 36 [2021-05-02 17:19:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:15,910 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-05-02 17:19:15,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:19:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-05-02 17:19:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 17:19:15,911 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:15,912 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:16,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:19:16,119 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:16,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:16,119 INFO L82 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2021-05-02 17:19:16,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:16,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007450394] [2021-05-02 17:19:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:16,130 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:16,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567028387] [2021-05-02 17:19:16,131 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 17:19:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:19:16,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 17:19:16,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:16,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:16,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:16,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:16,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:16,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:16,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:16,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:16,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:16,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:16,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:16,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:16,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:16,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:16,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 17:19:16,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:16,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007450394] [2021-05-02 17:19:16,454 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:16,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567028387] [2021-05-02 17:19:16,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567028387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:16,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:16,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 17:19:16,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042628104] [2021-05-02 17:19:16,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:19:16,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:16,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:19:16,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:19:16,456 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 17:19:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:16,612 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-05-02 17:19:16,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:19:16,613 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2021-05-02 17:19:16,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:16,615 INFO L225 Difference]: With dead ends: 60 [2021-05-02 17:19:16,615 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:19:16,616 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:19:16,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:19:16,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 17:19:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:19:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 17:19:16,626 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-02 17:19:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:16,626 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 17:19:16,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 17:19:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 17:19:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 17:19:16,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:16,628 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:16,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:19:16,833 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:16,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:16,833 INFO L82 PathProgramCache]: Analyzing trace with hash 380668603, now seen corresponding path program 3 times [2021-05-02 17:19:16,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:16,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699837380] [2021-05-02 17:19:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:16,848 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:16,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193697692] [2021-05-02 17:19:16,849 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 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 17:19:16,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 17:19:16,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:19:16,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:19:16,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:20:45,533 WARN L205 SmtUtils]: Spent 1.47 m on a formula simplification that was a NOOP. DAG size: 17 [2021-05-02 17:20:45,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:45,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 17:20:45,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:20:45,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699837380] [2021-05-02 17:20:45,608 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:20:45,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193697692] [2021-05-02 17:20:45,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193697692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:20:45,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:20:45,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 17:20:45,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80070053] [2021-05-02 17:20:45,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:20:45,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:20:45,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:20:45,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:20:45,610 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 17:20:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:20:47,839 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-02 17:20:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:20:47,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-02 17:20:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:20:47,841 INFO L225 Difference]: With dead ends: 52 [2021-05-02 17:20:47,841 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:20:47,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88738.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:20:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:20:47,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-02 17:20:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 17:20:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 17:20:47,850 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-02 17:20:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:20:47,851 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 17:20:47,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 17:20:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 17:20:47,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 17:20:47,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:20:47,865 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:20:48,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 17:20:48,075 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:20:48,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:20:48,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 2 times [2021-05-02 17:20:48,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:20:48,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242115698] [2021-05-02 17:20:48,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:20:48,084 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:20:48,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128990940] [2021-05-02 17:20:48,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:20:48,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:20:48,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:20:48,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 17:20:48,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:20:48,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 17:20:48,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:20:48,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242115698] [2021-05-02 17:20:48,437 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:20:48,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128990940] [2021-05-02 17:20:48,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128990940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:20:48,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:20:48,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 17:20:48,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736423861] [2021-05-02 17:20:48,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:20:48,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:20:48,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:20:48,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:20:48,439 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 17:20:48,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:20:48,621 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-05-02 17:20:48,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 17:20:48,622 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), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 47 [2021-05-02 17:20:48,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:20:48,625 INFO L225 Difference]: With dead ends: 51 [2021-05-02 17:20:48,626 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 17:20:48,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:20:48,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 17:20:48,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-05-02 17:20:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 17:20:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-02 17:20:48,645 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-02 17:20:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:20:48,645 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-02 17:20:48,645 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), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 17:20:48,645 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-02 17:20:48,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 17:20:48,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:20:48,646 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:20:48,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:20:48,865 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:20:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:20:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 3 times [2021-05-02 17:20:48,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:20:48,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419679624] [2021-05-02 17:20:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:20:48,878 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:20:48,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205110891] [2021-05-02 17:20:48,878 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 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 17:20:49,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:20:49,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:20:49,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 17:20:49,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:20:49,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:49,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:49,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:49,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:49,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:49,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:49,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:49,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:49,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:49,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:49,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-02 17:20:49,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:20:49,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419679624] [2021-05-02 17:20:49,373 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:20:49,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205110891] [2021-05-02 17:20:49,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205110891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:20:49,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:20:49,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 17:20:49,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981028529] [2021-05-02 17:20:49,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:20:49,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:20:49,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:20:49,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:20:49,375 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 17:20:49,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:20:49,590 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-05-02 17:20:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:20:49,591 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-02 17:20:49,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:20:49,592 INFO L225 Difference]: With dead ends: 52 [2021-05-02 17:20:49,592 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 17:20:49,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:20:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 17:20:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 17:20:49,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:20:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-02 17:20:49,602 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-02 17:20:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:20:49,602 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-02 17:20:49,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 17:20:49,602 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-02 17:20:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 17:20:49,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:20:49,603 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:20:49,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:20:49,810 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:20:49,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:20:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash 307258797, now seen corresponding path program 4 times [2021-05-02 17:20:49,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:20:49,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032217516] [2021-05-02 17:20:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:20:49,837 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:20:49,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352857028] [2021-05-02 17:20:49,837 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 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 17:20:49,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:20:49,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:20:49,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:20:49,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:20:50,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:50,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:50,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:50,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:50,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:50,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:50,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:50,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:50,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:50,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 17:20:50,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:20:50,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032217516] [2021-05-02 17:20:50,098 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:20:50,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352857028] [2021-05-02 17:20:50,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352857028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:20:50,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:20:50,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 17:20:50,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567276344] [2021-05-02 17:20:50,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:20:50,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:20:50,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:20:50,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:20:50,100 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-02 17:20:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:20:50,237 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-05-02 17:20:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:20:50,238 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2021-05-02 17:20:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:20:50,239 INFO L225 Difference]: With dead ends: 55 [2021-05-02 17:20:50,239 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 17:20:50,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:20:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 17:20:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 17:20:50,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:20:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-02 17:20:50,249 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-02 17:20:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:20:50,249 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-02 17:20:50,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-02 17:20:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-02 17:20:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 17:20:50,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:20:50,251 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:20:50,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 17:20:50,465 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:20:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:20:50,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1082774365, now seen corresponding path program 5 times [2021-05-02 17:20:50,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:20:50,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628366021] [2021-05-02 17:20:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:20:50,471 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:20:50,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319507064] [2021-05-02 17:20:50,472 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 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 17:20:51,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 17:20:51,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:20:51,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 17:20:51,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:20:51,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:51,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:51,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:51,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:51,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:51,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:51,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:51,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:51,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:51,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:51,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 17:20:51,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:20:51,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628366021] [2021-05-02 17:20:51,302 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:20:51,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319507064] [2021-05-02 17:20:51,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319507064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:20:51,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:20:51,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 17:20:51,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492936135] [2021-05-02 17:20:51,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 17:20:51,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:20:51,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 17:20:51,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:20:51,304 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-02 17:20:51,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:20:51,534 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2021-05-02 17:20:51,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 17:20:51,535 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2021-05-02 17:20:51,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:20:51,536 INFO L225 Difference]: With dead ends: 58 [2021-05-02 17:20:51,536 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 17:20:51,536 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:20:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 17:20:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-02 17:20:51,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 17:20:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-05-02 17:20:51,546 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 68 [2021-05-02 17:20:51,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:20:51,547 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-05-02 17:20:51,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-02 17:20:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-05-02 17:20:51,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 17:20:51,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:20:51,548 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:20:51,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:20:51,756 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:20:51,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:20:51,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1692754003, now seen corresponding path program 6 times [2021-05-02 17:20:51,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:20:51,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567225916] [2021-05-02 17:20:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:20:51,765 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:20:51,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872640093] [2021-05-02 17:20:51,765 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 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 17:20:52,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 17:20:52,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:20:52,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 17:20:52,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:20:52,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:20:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 66 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-05-02 17:20:52,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:20:52,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567225916] [2021-05-02 17:20:52,995 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:20:52,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872640093] [2021-05-02 17:20:52,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872640093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:20:52,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:20:52,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 17:20:52,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931345223] [2021-05-02 17:20:52,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 17:20:52,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:20:52,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 17:20:52,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:20:52,997 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-02 17:20:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:20:55,354 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-05-02 17:20:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 17:20:55,354 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 75 [2021-05-02 17:20:55,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:20:55,355 INFO L225 Difference]: With dead ends: 63 [2021-05-02 17:20:55,355 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 17:20:55,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:20:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 17:20:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-05-02 17:20:55,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 14 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 17:20:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-05-02 17:20:55,365 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 75 [2021-05-02 17:20:55,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:20:55,366 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-05-02 17:20:55,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-02 17:20:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-05-02 17:20:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 17:20:55,367 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:20:55,367 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:20:55,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 17:20:55,574 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:20:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:20:55,574 INFO L82 PathProgramCache]: Analyzing trace with hash 615143773, now seen corresponding path program 7 times [2021-05-02 17:20:55,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:20:55,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972813775] [2021-05-02 17:20:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:20:55,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:20:55,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229419473] [2021-05-02 17:20:55,586 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 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 17:21:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:21:00,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 17:21:00,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:21:00,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 17:21:00,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:21:00,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972813775] [2021-05-02 17:21:00,759 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:21:00,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229419473] [2021-05-02 17:21:00,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229419473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:21:00,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:21:00,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 17:21:00,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978833574] [2021-05-02 17:21:00,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 17:21:00,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:21:00,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 17:21:00,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:21:00,761 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-02 17:21:01,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:21:01,090 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2021-05-02 17:21:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 17:21:01,090 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 82 [2021-05-02 17:21:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:21:01,094 INFO L225 Difference]: With dead ends: 66 [2021-05-02 17:21:01,094 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 17:21:01,095 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:21:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 17:21:01,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-05-02 17:21:01,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 15 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 17:21:01,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 17:21:01,117 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 82 [2021-05-02 17:21:01,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:21:01,117 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 17:21:01,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 11 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-02 17:21:01,117 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 17:21:01,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 17:21:01,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:21:01,121 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:21:01,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 17:21:01,335 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:21:01,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:21:01,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1334355539, now seen corresponding path program 8 times [2021-05-02 17:21:01,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:21:01,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000708275] [2021-05-02 17:21:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:21:01,345 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:21:01,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257339781] [2021-05-02 17:21:01,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:21:02,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:21:02,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:21:02,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-02 17:21:02,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:21:02,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:02,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:03,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:03,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:03,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:03,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:03,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:03,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 43 proven. 115 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-05-02 17:21:03,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:21:03,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000708275] [2021-05-02 17:21:03,261 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:21:03,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257339781] [2021-05-02 17:21:03,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257339781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:21:03,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:21:03,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 17:21:03,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640037946] [2021-05-02 17:21:03,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 17:21:03,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:21:03,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 17:21:03,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-02 17:21:03,263 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-02 17:21:03,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:21:03,851 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-05-02 17:21:03,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 17:21:03,851 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 89 [2021-05-02 17:21:03,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:21:03,852 INFO L225 Difference]: With dead ends: 73 [2021-05-02 17:21:03,852 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 17:21:03,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:21:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 17:21:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2021-05-02 17:21:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 16 states have call successors, (16), 7 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 17:21:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-05-02 17:21:03,862 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 89 [2021-05-02 17:21:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:21:03,863 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-05-02 17:21:03,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 13 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-02 17:21:03,863 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-05-02 17:21:03,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 17:21:03,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:21:03,864 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:21:04,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:21:04,070 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:21:04,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:21:04,070 INFO L82 PathProgramCache]: Analyzing trace with hash 711483229, now seen corresponding path program 9 times [2021-05-02 17:21:04,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:21:04,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290824036] [2021-05-02 17:21:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:21:04,081 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:21:04,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947933374] [2021-05-02 17:21:04,081 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 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 17:21:05,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 17:21:05,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:21:05,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 17:21:05,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:21:05,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:05,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:05,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:05,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:05,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:05,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:05,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:05,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:05,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 24 proven. 163 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-05-02 17:21:06,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:21:06,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290824036] [2021-05-02 17:21:06,246 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:21:06,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947933374] [2021-05-02 17:21:06,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947933374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:21:06,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:21:06,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 17:21:06,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090682691] [2021-05-02 17:21:06,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 17:21:06,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:21:06,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 17:21:06,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-05-02 17:21:06,248 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-05-02 17:21:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:21:06,614 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-05-02 17:21:06,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 17:21:06,614 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 96 [2021-05-02 17:21:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:21:06,615 INFO L225 Difference]: With dead ends: 70 [2021-05-02 17:21:06,615 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 17:21:06,616 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 332.1ms TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-02 17:21:06,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 17:21:06,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 17:21:06,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 17:21:06,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-05-02 17:21:06,626 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 96 [2021-05-02 17:21:06,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:21:06,627 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-05-02 17:21:06,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-05-02 17:21:06,627 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-05-02 17:21:06,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 17:21:06,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:21:06,628 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:21:06,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 17:21:06,838 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:21:06,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:21:06,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1610181715, now seen corresponding path program 10 times [2021-05-02 17:21:06,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:21:06,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563356610] [2021-05-02 17:21:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:21:06,845 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:21:06,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250458891] [2021-05-02 17:21:06,845 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 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 17:21:06,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:21:06,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:21:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 17:21:06,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:21:07,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:07,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:07,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:07,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:07,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:07,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:07,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:07,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:07,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:07,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:21:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-05-02 17:21:07,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:21:07,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563356610] [2021-05-02 17:21:07,262 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:21:07,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250458891] [2021-05-02 17:21:07,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250458891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:21:07,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:21:07,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 17:21:07,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553836585] [2021-05-02 17:21:07,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 17:21:07,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:21:07,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 17:21:07,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:21:07,264 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-05-02 17:21:07,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:21:07,546 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2021-05-02 17:21:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 17:21:07,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 103 [2021-05-02 17:21:07,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:21:07,547 INFO L225 Difference]: With dead ends: 73 [2021-05-02 17:21:07,547 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 17:21:07,548 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:21:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 17:21:07,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-02 17:21:07,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 18 states have call successors, (18), 7 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 17:21:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-05-02 17:21:07,559 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 103 [2021-05-02 17:21:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:21:07,559 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-05-02 17:21:07,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-05-02 17:21:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-05-02 17:21:07,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 17:21:07,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:21:07,561 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:21:07,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:21:07,761 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:21:07,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:21:07,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1881400669, now seen corresponding path program 11 times [2021-05-02 17:21:07,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:21:07,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900819804] [2021-05-02 17:21:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:21:07,768 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:21:07,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600245963] [2021-05-02 17:21:07,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true