/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/cohencu-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:06:25,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:06:25,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:06:25,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:06:25,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:06:25,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:06:25,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:06:25,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:06:25,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:06:25,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:06:25,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:06:25,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:06:25,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:06:25,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:06:25,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:06:25,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:06:25,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:06:25,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:06:25,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:06:25,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:06:25,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:06:25,631 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:06:25,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:06:25,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:06:25,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:06:25,633 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:06:25,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:06:25,633 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:06:25,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:06:25,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:06:25,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:06:25,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:06:25,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:06:25,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:06:25,635 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:06:25,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:06:25,635 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:06:25,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:06:25,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:06:25,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:06:25,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:06:25,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:06:25,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:06:25,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:06:25,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:06:25,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:06:25,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:06:25,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:06:25,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:06:25,636 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:06:25,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:06:25,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:06:25,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:06:25,939 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:06:25,940 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:06:25,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2021-05-02 14:06:26,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5746f18f1/afab96bd8085466192ffe7f1cfc2f0f1/FLAG899ce7e62 [2021-05-02 14:06:26,429 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:06:26,430 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2021-05-02 14:06:26,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5746f18f1/afab96bd8085466192ffe7f1cfc2f0f1/FLAG899ce7e62 [2021-05-02 14:06:26,457 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5746f18f1/afab96bd8085466192ffe7f1cfc2f0f1 [2021-05-02 14:06:26,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:06:26,475 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:06:26,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:06:26,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:06:26,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:06:26,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:06:26" (1/1) ... [2021-05-02 14:06:26,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15454b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:26, skipping insertion in model container [2021-05-02 14:06:26,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:06:26" (1/1) ... [2021-05-02 14:06:26,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:06:26,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:06:26,620 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/cohencu-ll_valuebound50.c[596,609] [2021-05-02 14:06:26,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:06:26,637 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:06:26,664 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/cohencu-ll_valuebound50.c[596,609] [2021-05-02 14:06:26,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:06:26,689 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:06:26,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:26 WrapperNode [2021-05-02 14:06:26,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:06:26,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:06:26,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:06:26,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:06:26,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:26" (1/1) ... [2021-05-02 14:06:26,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:26" (1/1) ... [2021-05-02 14:06:26,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:26" (1/1) ... [2021-05-02 14:06:26,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:26" (1/1) ... [2021-05-02 14:06:26,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:26" (1/1) ... [2021-05-02 14:06:26,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:26" (1/1) ... [2021-05-02 14:06:26,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:26" (1/1) ... [2021-05-02 14:06:26,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:06:26,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:06:26,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:06:26,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:06:26,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:06:26,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:06:26,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:06:26,977 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:06:26,977 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:06:26,977 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:06:26,977 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:06:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:06:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:06:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:06:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:06:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-02 14:06:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:06:26,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:06:26,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:06:26,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:06:26,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:06:26,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:06:26,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:06:26,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:06:26,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:06:27,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:06:27,276 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 14:06:27,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:06:27 BoogieIcfgContainer [2021-05-02 14:06:27,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:06:27,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:06:27,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:06:27,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:06:27,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:06:26" (1/3) ... [2021-05-02 14:06:27,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c6668f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:06:27, skipping insertion in model container [2021-05-02 14:06:27,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:06:26" (2/3) ... [2021-05-02 14:06:27,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c6668f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:06:27, skipping insertion in model container [2021-05-02 14:06:27,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:06:27" (3/3) ... [2021-05-02 14:06:27,299 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound50.c [2021-05-02 14:06:27,302 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:06:27,315 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:06:27,335 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:06:27,374 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:06:27,375 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:06:27,375 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:06:27,375 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:06:27,375 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:06:27,375 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:06:27,375 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:06:27,375 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:06:27,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 14:06:27,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 14:06:27,405 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:27,406 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:27,406 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:27,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:27,410 INFO L82 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 1 times [2021-05-02 14:06:27,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:27,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534214226] [2021-05-02 14:06:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:27,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:06:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:27,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:06:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:06:27,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:27,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534214226] [2021-05-02 14:06:27,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534214226] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:06:27,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:06:27,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:06:27,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975542317] [2021-05-02 14:06:27,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:06:27,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:27,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:06:27,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:06:27,702 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:06:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:27,916 INFO L93 Difference]: Finished difference Result 63 states and 101 transitions. [2021-05-02 14:06:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:06:27,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 14:06:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:27,926 INFO L225 Difference]: With dead ends: 63 [2021-05-02 14:06:27,926 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 14:06:27,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:06:27,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 14:06:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 14:06:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:06:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-05-02 14:06:28,028 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2021-05-02 14:06:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:28,028 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-05-02 14:06:28,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:06:28,029 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-05-02 14:06:28,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 14:06:28,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:28,029 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:28,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:06:28,030 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:28,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:28,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 1 times [2021-05-02 14:06:28,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:28,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370502763] [2021-05-02 14:06:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:28,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:06:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:28,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:06:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:06:28,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:28,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370502763] [2021-05-02 14:06:28,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370502763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:06:28,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:06:28,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 14:06:28,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14612973] [2021-05-02 14:06:28,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:06:28,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:28,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:06:28,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:06:28,187 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:06:28,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:28,412 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-05-02 14:06:28,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:06:28,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 14:06:28,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:28,414 INFO L225 Difference]: With dead ends: 37 [2021-05-02 14:06:28,414 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:06:28,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:28,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:06:28,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:06:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:06:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 14:06:28,432 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2021-05-02 14:06:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:28,433 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 14:06:28,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 14:06:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 14:06:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 14:06:28,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:28,434 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:28,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 14:06:28,435 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:28,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:28,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 1 times [2021-05-02 14:06:28,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:28,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992656017] [2021-05-02 14:06:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:28,458 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:28,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208784635] [2021-05-02 14:06:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:28,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:06:28,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:06:28,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:28,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992656017] [2021-05-02 14:06:28,715 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:28,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208784635] [2021-05-02 14:06:28,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208784635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:28,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:28,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:06:28,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589170462] [2021-05-02 14:06:28,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:06:28,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:28,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:06:28,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:06:28,719 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 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 14:06:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:28,982 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2021-05-02 14:06:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:06:28,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 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 14:06:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:28,984 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:06:28,984 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 14:06:28,985 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:28,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 14:06:28,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 14:06:29,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 14:06:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2021-05-02 14:06:29,003 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 22 [2021-05-02 14:06:29,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:29,004 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2021-05-02 14:06:29,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 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 14:06:29,004 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2021-05-02 14:06:29,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 14:06:29,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:29,005 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:29,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 14:06:29,221 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:29,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:29,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 1 times [2021-05-02 14:06:29,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:29,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887401039] [2021-05-02 14:06:29,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:29,228 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:29,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255642974] [2021-05-02 14:06:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:29,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:06:29,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:06:29,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:29,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887401039] [2021-05-02 14:06:29,489 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:29,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255642974] [2021-05-02 14:06:29,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255642974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:29,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:29,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:06:29,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982875877] [2021-05-02 14:06:29,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:06:29,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:29,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:06:29,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:06:29,491 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:06:29,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:29,837 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2021-05-02 14:06:29,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:06:29,838 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-05-02 14:06:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:29,839 INFO L225 Difference]: With dead ends: 62 [2021-05-02 14:06:29,839 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 14:06:29,840 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:29,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 14:06:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 14:06:29,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 14:06:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2021-05-02 14:06:29,870 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 27 [2021-05-02 14:06:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:29,870 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2021-05-02 14:06:29,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:06:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2021-05-02 14:06:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 14:06:29,871 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:29,871 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:30,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:30,081 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:30,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 1 times [2021-05-02 14:06:30,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:30,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126823730] [2021-05-02 14:06:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:30,088 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:30,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014647522] [2021-05-02 14:06:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:30,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:06:30,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 14:06:30,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:30,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126823730] [2021-05-02 14:06:30,309 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:30,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014647522] [2021-05-02 14:06:30,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014647522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:30,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:30,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:06:30,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126484364] [2021-05-02 14:06:30,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:06:30,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:06:30,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:06:30,314 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:06:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:30,508 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2021-05-02 14:06:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:06:30,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2021-05-02 14:06:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:30,510 INFO L225 Difference]: With dead ends: 66 [2021-05-02 14:06:30,510 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 14:06:30,510 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 14:06:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 14:06:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:06:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-05-02 14:06:30,516 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 32 [2021-05-02 14:06:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:30,516 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-05-02 14:06:30,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:06:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-05-02 14:06:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 14:06:30,517 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:30,517 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:30,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:30,737 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:30,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:30,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1002403483, now seen corresponding path program 1 times [2021-05-02 14:06:30,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:30,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732117772] [2021-05-02 14:06:30,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:30,771 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:30,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395964614] [2021-05-02 14:06:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:30,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:06:30,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 14:06:31,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:31,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732117772] [2021-05-02 14:06:31,039 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:31,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395964614] [2021-05-02 14:06:31,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395964614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:31,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:31,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:06:31,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824714307] [2021-05-02 14:06:31,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:06:31,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:31,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:06:31,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:06:31,041 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 14:06:31,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:31,288 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2021-05-02 14:06:31,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:06:31,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2021-05-02 14:06:31,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:31,293 INFO L225 Difference]: With dead ends: 81 [2021-05-02 14:06:31,293 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 14:06:31,293 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:06:31,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 14:06:31,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-02 14:06:31,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 40 states have internal predecessors, (41), 29 states have call successors, (29), 11 states have call predecessors, (29), 10 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 14:06:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-05-02 14:06:31,324 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 49 [2021-05-02 14:06:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:31,324 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-05-02 14:06:31,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 14:06:31,324 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-05-02 14:06:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 14:06:31,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:31,325 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:31,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:31,543 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:31,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:31,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 2 times [2021-05-02 14:06:31,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:31,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506100824] [2021-05-02 14:06:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:31,558 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:31,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197731215] [2021-05-02 14:06:31,558 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:31,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:06:31,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:06:31,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:06:31,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 14:06:31,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:31,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506100824] [2021-05-02 14:06:31,983 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:31,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197731215] [2021-05-02 14:06:31,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197731215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:31,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:31,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:06:31,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327786881] [2021-05-02 14:06:31,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:06:31,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:31,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:06:31,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:06:31,984 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:06:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:32,322 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2021-05-02 14:06:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:06:32,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 54 [2021-05-02 14:06:32,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:32,324 INFO L225 Difference]: With dead ends: 85 [2021-05-02 14:06:32,324 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 14:06:32,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:06:32,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 14:06:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 14:06:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 43 states have internal predecessors, (44), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 14:06:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2021-05-02 14:06:32,331 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 54 [2021-05-02 14:06:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:32,332 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2021-05-02 14:06:32,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:06:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2021-05-02 14:06:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 14:06:32,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:32,333 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:32,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 14:06:32,549 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:32,549 INFO L82 PathProgramCache]: Analyzing trace with hash -310331719, now seen corresponding path program 1 times [2021-05-02 14:06:32,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:32,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251108412] [2021-05-02 14:06:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:32,555 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:32,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772454797] [2021-05-02 14:06:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:32,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 14:06:32,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:32,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:32,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:33,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:33,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:33,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:33,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-02 14:06:33,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:33,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251108412] [2021-05-02 14:06:33,052 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:33,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772454797] [2021-05-02 14:06:33,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772454797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:33,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:33,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:06:33,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805245317] [2021-05-02 14:06:33,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:06:33,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:33,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:06:33,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:33,055 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:06:33,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:33,245 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2021-05-02 14:06:33,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:06:33,246 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2021-05-02 14:06:33,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:33,250 INFO L225 Difference]: With dead ends: 91 [2021-05-02 14:06:33,250 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 14:06:33,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:06:33,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 14:06:33,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-02 14:06:33,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 49 states have internal predecessors, (50), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 14:06:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2021-05-02 14:06:33,264 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 75 [2021-05-02 14:06:33,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:33,265 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2021-05-02 14:06:33,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:06:33,265 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2021-05-02 14:06:33,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 14:06:33,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:33,270 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:33,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:33,485 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:33,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:33,486 INFO L82 PathProgramCache]: Analyzing trace with hash -63758730, now seen corresponding path program 3 times [2021-05-02 14:06:33,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:33,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190417438] [2021-05-02 14:06:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:33,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:33,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074687094] [2021-05-02 14:06:33,502 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 14:06:33,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:06:33,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:06:33,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:06:33,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:33,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:33,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 51 proven. 14 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 14:06:33,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:33,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190417438] [2021-05-02 14:06:33,994 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:33,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074687094] [2021-05-02 14:06:33,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074687094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:33,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:33,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:06:33,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098656786] [2021-05-02 14:06:33,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:06:33,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:33,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:06:33,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:33,998 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:06:34,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:34,383 INFO L93 Difference]: Finished difference Result 112 states and 135 transitions. [2021-05-02 14:06:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:06:34,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2021-05-02 14:06:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:34,388 INFO L225 Difference]: With dead ends: 112 [2021-05-02 14:06:34,388 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 14:06:34,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:06:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 14:06:34,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 14:06:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 58 states have internal predecessors, (59), 38 states have call successors, (38), 16 states have call predecessors, (38), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 14:06:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-05-02 14:06:34,427 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 76 [2021-05-02 14:06:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:34,428 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-05-02 14:06:34,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:06:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-05-02 14:06:34,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:06:34,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:34,429 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:34,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 14:06:34,644 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:34,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:34,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1701746168, now seen corresponding path program 1 times [2021-05-02 14:06:34,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:34,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654739652] [2021-05-02 14:06:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:34,650 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:34,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881565660] [2021-05-02 14:06:34,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:34,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:06:34,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:34,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:34,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-02 14:06:35,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:35,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654739652] [2021-05-02 14:06:35,160 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:35,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881565660] [2021-05-02 14:06:35,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881565660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:35,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:35,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:06:35,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501119617] [2021-05-02 14:06:35,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:06:35,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:35,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:06:35,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:35,161 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:06:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:35,374 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2021-05-02 14:06:35,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:06:35,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 80 [2021-05-02 14:06:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:35,378 INFO L225 Difference]: With dead ends: 115 [2021-05-02 14:06:35,378 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 14:06:35,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:06:35,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 14:06:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-05-02 14:06:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 61 states have internal predecessors, (62), 38 states have call successors, (38), 17 states have call predecessors, (38), 16 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 14:06:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2021-05-02 14:06:35,391 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 80 [2021-05-02 14:06:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:35,392 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2021-05-02 14:06:35,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:06:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2021-05-02 14:06:35,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 14:06:35,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:35,393 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:35,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 14:06:35,609 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:35,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:35,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1156119141, now seen corresponding path program 4 times [2021-05-02 14:06:35,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:35,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938633933] [2021-05-02 14:06:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:35,615 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:35,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790768636] [2021-05-02 14:06:35,615 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:35,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:06:35,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:06:35,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 14:06:35,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-02 14:06:36,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:36,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938633933] [2021-05-02 14:06:36,005 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:36,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790768636] [2021-05-02 14:06:36,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790768636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:36,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:36,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:06:36,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335460063] [2021-05-02 14:06:36,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:06:36,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:36,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:06:36,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:36,007 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:06:36,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:36,343 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2021-05-02 14:06:36,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:06:36,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 81 [2021-05-02 14:06:36,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:36,345 INFO L225 Difference]: With dead ends: 124 [2021-05-02 14:06:36,345 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 14:06:36,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:06:36,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 14:06:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 14:06:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 60 states have internal predecessors, (61), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 14:06:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-05-02 14:06:36,352 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 81 [2021-05-02 14:06:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:36,353 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-05-02 14:06:36,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:06:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-05-02 14:06:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 14:06:36,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:36,353 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:36,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:36,567 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:36,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:36,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1087104342, now seen corresponding path program 5 times [2021-05-02 14:06:36,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:36,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127100664] [2021-05-02 14:06:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:36,578 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:36,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858749881] [2021-05-02 14:06:36,578 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:36,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 14:06:36,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:06:36,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 14:06:36,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 83 proven. 50 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-05-02 14:06:37,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:37,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127100664] [2021-05-02 14:06:37,176 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:37,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858749881] [2021-05-02 14:06:37,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858749881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:37,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:37,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:06:37,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58692076] [2021-05-02 14:06:37,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:06:37,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:37,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:06:37,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:37,177 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 14:06:37,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:37,452 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2021-05-02 14:06:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:06:37,453 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 86 [2021-05-02 14:06:37,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:37,454 INFO L225 Difference]: With dead ends: 116 [2021-05-02 14:06:37,454 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 14:06:37,457 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:06:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 14:06:37,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 14:06:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 14:06:37,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2021-05-02 14:06:37,471 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 86 [2021-05-02 14:06:37,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:37,471 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2021-05-02 14:06:37,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 14:06:37,472 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2021-05-02 14:06:37,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 14:06:37,472 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:37,472 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:37,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:37,704 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:37,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:37,704 INFO L82 PathProgramCache]: Analyzing trace with hash 511374036, now seen corresponding path program 2 times [2021-05-02 14:06:37,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:37,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552186835] [2021-05-02 14:06:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:37,710 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:37,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733392027] [2021-05-02 14:06:37,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:37,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:06:37,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:06:37,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 14:06:37,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:37,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:37,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:37,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:37,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:37,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:37,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:37,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:37,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:37,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:37,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:37,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:37,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 46 proven. 52 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-05-02 14:06:38,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:38,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552186835] [2021-05-02 14:06:38,346 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:38,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733392027] [2021-05-02 14:06:38,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733392027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:38,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:38,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:06:38,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363722623] [2021-05-02 14:06:38,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:06:38,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:38,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:06:38,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:38,348 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-02 14:06:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:38,681 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2021-05-02 14:06:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:06:38,681 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2021-05-02 14:06:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:38,683 INFO L225 Difference]: With dead ends: 117 [2021-05-02 14:06:38,683 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 14:06:38,683 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:06:38,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 14:06:38,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-05-02 14:06:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.046875) internal successors, (67), 66 states have internal predecessors, (67), 32 states have call successors, (32), 19 states have call predecessors, (32), 18 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 14:06:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2021-05-02 14:06:38,706 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 102 [2021-05-02 14:06:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:38,706 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2021-05-02 14:06:38,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-02 14:06:38,706 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2021-05-02 14:06:38,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 14:06:38,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:38,707 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:38,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 14:06:38,924 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:38,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:38,924 INFO L82 PathProgramCache]: Analyzing trace with hash -360684101, now seen corresponding path program 6 times [2021-05-02 14:06:38,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:38,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610533121] [2021-05-02 14:06:38,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:38,929 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:38,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164612317] [2021-05-02 14:06:38,929 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:39,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 14:06:39,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:06:39,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 14:06:39,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:39,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:39,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:39,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:39,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:39,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:39,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:39,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:39,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:39,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:39,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:39,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:39,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:39,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:39,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-05-02 14:06:39,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:39,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610533121] [2021-05-02 14:06:39,347 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:39,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164612317] [2021-05-02 14:06:39,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164612317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:39,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:39,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:06:39,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428546339] [2021-05-02 14:06:39,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:06:39,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:39,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:06:39,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:06:39,348 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:06:46,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:46,328 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2021-05-02 14:06:46,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:06:46,328 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2021-05-02 14:06:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:46,329 INFO L225 Difference]: With dead ends: 121 [2021-05-02 14:06:46,329 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 14:06:46,329 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 295.7ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:06:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 14:06:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-02 14:06:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 67 states have (on average 1.044776119402985) internal successors, (70), 69 states have internal predecessors, (70), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 14:06:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2021-05-02 14:06:46,362 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 103 [2021-05-02 14:06:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:46,363 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2021-05-02 14:06:46,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:06:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2021-05-02 14:06:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 14:06:46,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:46,364 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:46,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:46,596 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:46,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:46,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1368175293, now seen corresponding path program 2 times [2021-05-02 14:06:46,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:46,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702484381] [2021-05-02 14:06:46,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:46,601 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:46,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437715128] [2021-05-02 14:06:46,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:46,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:06:46,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:06:46,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 14:06:46,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:46,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:46,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:47,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:47,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:47,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:47,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:47,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:47,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:47,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:47,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 48 proven. 55 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 14:06:47,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:47,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702484381] [2021-05-02 14:06:47,631 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:47,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437715128] [2021-05-02 14:06:47,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437715128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:47,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:47,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:06:47,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193654578] [2021-05-02 14:06:47,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:06:47,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:47,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:06:47,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:47,633 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 14:06:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:47,935 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2021-05-02 14:06:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:06:47,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2021-05-02 14:06:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:47,936 INFO L225 Difference]: With dead ends: 125 [2021-05-02 14:06:47,936 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 14:06:47,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 297.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:06:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 14:06:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 14:06:47,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 29 states have call successors, (29), 19 states have call predecessors, (29), 18 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 14:06:47,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2021-05-02 14:06:47,944 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 107 [2021-05-02 14:06:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:47,948 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2021-05-02 14:06:47,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 14:06:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2021-05-02 14:06:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 14:06:47,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:47,949 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:48,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-05-02 14:06:48,157 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1388085622, now seen corresponding path program 7 times [2021-05-02 14:06:48,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:48,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930432476] [2021-05-02 14:06:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:48,162 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:48,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382992776] [2021-05-02 14:06:48,162 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:06:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:06:48,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 48 proven. 67 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 14:06:48,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:48,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930432476] [2021-05-02 14:06:48,520 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:48,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382992776] [2021-05-02 14:06:48,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382992776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:48,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:48,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:06:48,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265860469] [2021-05-02 14:06:48,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:06:48,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:48,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:06:48,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:48,522 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 14:06:48,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:48,996 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2021-05-02 14:06:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:06:48,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 108 [2021-05-02 14:06:48,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:48,998 INFO L225 Difference]: With dead ends: 131 [2021-05-02 14:06:48,998 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 14:06:48,998 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:06:48,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 14:06:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2021-05-02 14:06:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 70 states have internal predecessors, (70), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 14:06:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2021-05-02 14:06:49,009 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 108 [2021-05-02 14:06:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:49,009 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2021-05-02 14:06:49,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 14:06:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2021-05-02 14:06:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 14:06:49,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:49,010 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:49,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:49,226 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:49,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:49,226 INFO L82 PathProgramCache]: Analyzing trace with hash 34642523, now seen corresponding path program 8 times [2021-05-02 14:06:49,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:49,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964983921] [2021-05-02 14:06:49,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:49,231 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:49,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501246338] [2021-05-02 14:06:49,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:49,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:06:49,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:06:49,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 14:06:49,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 50 proven. 73 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-05-02 14:06:49,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:49,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964983921] [2021-05-02 14:06:49,580 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:49,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501246338] [2021-05-02 14:06:49,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501246338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:49,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:49,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:06:49,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103982002] [2021-05-02 14:06:49,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:06:49,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:49,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:06:49,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:06:49,583 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-05-02 14:06:49,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:06:49,889 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2021-05-02 14:06:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:06:49,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 113 [2021-05-02 14:06:49,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:06:49,902 INFO L225 Difference]: With dead ends: 139 [2021-05-02 14:06:49,902 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 14:06:49,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:06:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 14:06:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-05-02 14:06:49,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.04) internal successors, (78), 77 states have internal predecessors, (78), 37 states have call successors, (37), 22 states have call predecessors, (37), 21 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 14:06:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 149 transitions. [2021-05-02 14:06:49,930 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 149 transitions. Word has length 113 [2021-05-02 14:06:49,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:06:49,931 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 149 transitions. [2021-05-02 14:06:49,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-05-02 14:06:49,931 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 149 transitions. [2021-05-02 14:06:49,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 14:06:49,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:06:49,932 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:06:50,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 14:06:50,148 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:06:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:06:50,148 INFO L82 PathProgramCache]: Analyzing trace with hash -2063139367, now seen corresponding path program 3 times [2021-05-02 14:06:50,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:06:50,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246495055] [2021-05-02 14:06:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:06:50,153 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:06:50,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770338644] [2021-05-02 14:06:50,153 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:06:52,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:06:52,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:06:52,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 14:06:52,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:06:52,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:52,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,631 WARN L205 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-05-02 14:06:53,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:53,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:06:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 162 proven. 17 refuted. 0 times theorem prover too weak. 745 trivial. 0 not checked. [2021-05-02 14:06:55,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:06:55,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246495055] [2021-05-02 14:06:55,072 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:06:55,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770338644] [2021-05-02 14:06:55,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770338644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:06:55,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:06:55,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:06:55,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719677191] [2021-05-02 14:06:55,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:06:55,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:06:55,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:06:55,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:06:55,073 INFO L87 Difference]: Start difference. First operand 134 states and 149 transitions. Second operand has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:08:05,459 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-05-02 14:08:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:08:13,606 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2021-05-02 14:08:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:08:13,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 129 [2021-05-02 14:08:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:08:13,608 INFO L225 Difference]: With dead ends: 140 [2021-05-02 14:08:13,608 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 14:08:13,608 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1765.8ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:08:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 14:08:13,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-05-02 14:08:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 80 states have internal predecessors, (81), 37 states have call successors, (37), 23 states have call predecessors, (37), 22 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 14:08:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2021-05-02 14:08:13,630 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 129 [2021-05-02 14:08:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:08:13,630 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2021-05-02 14:08:13,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:08:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2021-05-02 14:08:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 14:08:13,641 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:08:13,641 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:08:13,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:08:13,847 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:08:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:08:13,848 INFO L82 PathProgramCache]: Analyzing trace with hash -262683944, now seen corresponding path program 3 times [2021-05-02 14:08:13,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:08:13,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148351005] [2021-05-02 14:08:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:08:13,856 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:08:13,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767780174] [2021-05-02 14:08:13,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:08:15,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:08:15,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:08:15,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 14:08:15,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:08:15,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:15,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:18,104 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 14:08:18,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:18,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:28,863 WARN L205 SmtUtils]: Spent 8.12 s on a formula simplification that was a NOOP. DAG size: 47 [2021-05-02 14:08:28,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:28,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:28,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:28,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:28,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:08:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 276 proven. 59 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2021-05-02 14:08:29,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:08:29,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148351005] [2021-05-02 14:08:29,871 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:08:29,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767780174] [2021-05-02 14:08:29,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767780174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:08:29,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:08:29,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:08:29,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818828565] [2021-05-02 14:08:29,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:08:29,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:08:29,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:08:29,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=187, Unknown=1, NotChecked=0, Total=240 [2021-05-02 14:08:29,872 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand has 16 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 14:09:13,045 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 41 [2021-05-02 14:09:29,741 WARN L205 SmtUtils]: Spent 12.27 s on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-05-02 14:09:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:09:34,949 INFO L93 Difference]: Finished difference Result 156 states and 166 transitions. [2021-05-02 14:09:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:09:34,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) Word has length 134 [2021-05-02 14:09:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:09:34,950 INFO L225 Difference]: With dead ends: 156 [2021-05-02 14:09:34,950 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 14:09:34,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 31626.8ms TimeCoverageRelationStatistics Valid=87, Invalid=330, Unknown=3, NotChecked=0, Total=420 [2021-05-02 14:09:34,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 14:09:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-02 14:09:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 91 states have internal predecessors, (92), 32 states have call successors, (32), 27 states have call predecessors, (32), 26 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 14:09:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2021-05-02 14:09:34,961 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 134 [2021-05-02 14:09:34,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:09:34,962 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2021-05-02 14:09:34,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 14:09:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2021-05-02 14:09:34,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 14:09:34,962 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:09:34,962 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:09:35,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 14:09:35,167 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:09:35,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:09:35,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1923910469, now seen corresponding path program 9 times [2021-05-02 14:09:35,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:09:35,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990625064] [2021-05-02 14:09:35,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:09:35,173 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:09:35,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046313760] [2021-05-02 14:09:35,173 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:09:35,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:09:35,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:09:35,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 14:09:35,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:09:35,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:35,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:37,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:37,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:09:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 231 proven. 6 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2021-05-02 14:09:37,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:09:37,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990625064] [2021-05-02 14:09:37,779 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:09:37,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046313760] [2021-05-02 14:09:37,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046313760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:09:37,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:09:37,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:09:37,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464686294] [2021-05-02 14:09:37,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:09:37,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:09:37,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:09:37,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=109, Unknown=1, NotChecked=0, Total=132 [2021-05-02 14:09:37,780 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:09:44,891 WARN L205 SmtUtils]: Spent 6.91 s on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 14:10:00,269 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 14:10:10,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:10:10,715 INFO L93 Difference]: Finished difference Result 155 states and 159 transitions. [2021-05-02 14:10:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:10:10,716 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 135 [2021-05-02 14:10:10,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:10:10,716 INFO L225 Difference]: With dead ends: 155 [2021-05-02 14:10:10,716 INFO L226 Difference]: Without dead ends: 151 [2021-05-02 14:10:10,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 14883.6ms TimeCoverageRelationStatistics Valid=55, Invalid=249, Unknown=2, NotChecked=0, Total=306 [2021-05-02 14:10:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-02 14:10:10,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-02 14:10:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 32 states have call successors, (32), 28 states have call predecessors, (32), 26 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 14:10:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2021-05-02 14:10:10,736 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 135 [2021-05-02 14:10:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:10:10,737 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2021-05-02 14:10:10,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:10:10,743 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2021-05-02 14:10:10,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-02 14:10:10,748 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:10:10,748 INFO L523 BasicCegarLoop]: trace histogram [29, 28, 28, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:10:10,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 14:10:10,968 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:10:10,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:10:10,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1267842796, now seen corresponding path program 1 times [2021-05-02 14:10:10,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:10:10,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127174098] [2021-05-02 14:10:10,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:10:10,973 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:10:10,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821860047] [2021-05-02 14:10:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:10:11,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 14:10:11,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:10:11,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 209 proven. 142 refuted. 0 times theorem prover too weak. 1287 trivial. 0 not checked. [2021-05-02 14:10:11,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:10:11,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127174098] [2021-05-02 14:10:11,625 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:10:11,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821860047] [2021-05-02 14:10:11,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821860047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:10:11,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:10:11,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:10:11,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865188467] [2021-05-02 14:10:11,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:10:11,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:10:11,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:10:11,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:10:11,627 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2021-05-02 14:10:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:10:12,343 INFO L93 Difference]: Finished difference Result 174 states and 184 transitions. [2021-05-02 14:10:12,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:10:12,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) Word has length 166 [2021-05-02 14:10:12,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:10:12,344 INFO L225 Difference]: With dead ends: 174 [2021-05-02 14:10:12,344 INFO L226 Difference]: Without dead ends: 166 [2021-05-02 14:10:12,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:10:12,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-02 14:10:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-05-02 14:10:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 37 states have call successors, (37), 30 states have call predecessors, (37), 28 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 14:10:12,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 173 transitions. [2021-05-02 14:10:12,359 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 173 transitions. Word has length 166 [2021-05-02 14:10:12,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:10:12,359 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 173 transitions. [2021-05-02 14:10:12,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2021-05-02 14:10:12,359 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 173 transitions. [2021-05-02 14:10:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-05-02 14:10:12,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:10:12,377 INFO L523 BasicCegarLoop]: trace histogram [34, 33, 33, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:10:12,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 14:10:12,594 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:10:12,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:10:12,594 INFO L82 PathProgramCache]: Analyzing trace with hash 2044699673, now seen corresponding path program 2 times [2021-05-02 14:10:12,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:10:12,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565787357] [2021-05-02 14:10:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:10:12,599 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:10:12,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605426527] [2021-05-02 14:10:12,599 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:12,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:10:12,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:10:12,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-02 14:10:12,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:10:13,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,735 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-05-02 14:10:13,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 169 proven. 188 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2021-05-02 14:10:13,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:10:13,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565787357] [2021-05-02 14:10:13,937 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:10:13,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605426527] [2021-05-02 14:10:13,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605426527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:10:13,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:10:13,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:10:13,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617739641] [2021-05-02 14:10:13,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:10:13,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:10:13,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:10:13,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:10:13,939 INFO L87 Difference]: Start difference. First operand 166 states and 173 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2021-05-02 14:10:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:10:15,187 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2021-05-02 14:10:15,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:10:15,190 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 193 [2021-05-02 14:10:15,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:10:15,191 INFO L225 Difference]: With dead ends: 205 [2021-05-02 14:10:15,191 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 14:10:15,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 605.2ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:10:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 14:10:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-05-02 14:10:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 117 states have internal predecessors, (118), 42 states have call successors, (42), 35 states have call predecessors, (42), 33 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 14:10:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 200 transitions. [2021-05-02 14:10:15,208 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 200 transitions. Word has length 193 [2021-05-02 14:10:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:10:15,209 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 200 transitions. [2021-05-02 14:10:15,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2021-05-02 14:10:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 200 transitions. [2021-05-02 14:10:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-05-02 14:10:15,210 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:10:15,211 INFO L523 BasicCegarLoop]: trace histogram [39, 38, 38, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:10:15,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 14:10:15,415 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:10:15,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:10:15,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1606256116, now seen corresponding path program 3 times [2021-05-02 14:10:15,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:10:15,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605177933] [2021-05-02 14:10:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:10:15,421 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:10:15,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892166074] [2021-05-02 14:10:15,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:40,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:10:40,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:10:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-02 14:10:40,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:10:40,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:40,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:41,053 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 14:10:41,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:41,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:47,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:47,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:52,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:58,908 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 14:10:58,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:58,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:11:32,669 WARN L205 SmtUtils]: Spent 25.10 s on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-05-02 14:11:32,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:11:32,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:11:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 706 proven. 99 refuted. 3 times theorem prover too weak. 2227 trivial. 0 not checked. [2021-05-02 14:11:33,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:11:33,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605177933] [2021-05-02 14:11:33,123 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:11:33,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892166074] [2021-05-02 14:11:33,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892166074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:11:33,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:11:33,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:11:33,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050216649] [2021-05-02 14:11:33,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:11:33,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:11:33,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:11:33,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=190, Unknown=10, NotChecked=0, Total=240 [2021-05-02 14:11:33,125 INFO L87 Difference]: Start difference. First operand 193 states and 200 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2021-05-02 14:12:24,091 WARN L205 SmtUtils]: Spent 50.75 s on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2021-05-02 14:12:48,794 WARN L205 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 14:13:26,468 WARN L205 SmtUtils]: Spent 18.28 s on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-05-02 14:14:14,390 WARN L205 SmtUtils]: Spent 24.40 s on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-05-02 14:14:57,709 WARN L205 SmtUtils]: Spent 29.51 s on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-05-02 14:15:02,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:15:02,898 INFO L93 Difference]: Finished difference Result 193 states and 200 transitions. [2021-05-02 14:15:02,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:15:02,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 220 [2021-05-02 14:15:02,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:15:02,914 INFO L225 Difference]: With dead ends: 193 [2021-05-02 14:15:02,914 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:15:02,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 210759.9ms TimeCoverageRelationStatistics Valid=105, Invalid=425, Unknown=22, NotChecked=0, Total=552 [2021-05-02 14:15:02,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:15:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:15:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 14:15:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:15:02,916 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 220 [2021-05-02 14:15:02,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:15:02,916 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:15:02,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2021-05-02 14:15:02,916 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:15:02,916 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:15:03,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-02 14:15:03,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:15:30,206 WARN L205 SmtUtils]: Spent 26.52 s on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2021-05-02 14:15:50,594 WARN L205 SmtUtils]: Spent 20.36 s on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2021-05-02 14:18:13,812 WARN L205 SmtUtils]: Spent 2.39 m on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2021-05-02 14:18:46,668 WARN L205 SmtUtils]: Spent 32.84 s on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2021-05-02 14:18:46,773 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27