/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/egcd-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:49:43,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:49:43,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:49:43,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:49:43,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:49:43,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:49:43,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:49:43,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:49:43,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:49:43,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:49:43,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:49:43,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:49:43,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:49:43,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:49:43,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:49:43,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:49:43,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:49:43,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:49:43,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:49:43,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:49:43,549 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:49:43,576 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:49:43,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:49:43,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:49:43,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:49:43,579 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:49:43,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:49:43,579 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:49:43,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:49:43,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:49:43,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:49:43,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:49:43,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:49:43,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:49:43,580 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:49:43,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:49:43,580 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:49:43,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:49:43,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:49:43,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:49:43,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:49:43,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:49:43,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:49:43,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:49:43,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:49:43,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:49:43,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:49:43,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:49:43,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:49:43,582 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:49:43,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:49:43,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:49:43,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:49:43,859 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:49:43,860 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:49:43,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c [2021-05-02 14:49:43,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d6cddcc5/7b1cef337e274569976cfaeaff099f82/FLAG6ca486dae [2021-05-02 14:49:44,275 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:49:44,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c [2021-05-02 14:49:44,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d6cddcc5/7b1cef337e274569976cfaeaff099f82/FLAG6ca486dae [2021-05-02 14:49:44,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d6cddcc5/7b1cef337e274569976cfaeaff099f82 [2021-05-02 14:49:44,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:49:44,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:49:44,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:49:44,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:49:44,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:49:44,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:49:44" (1/1) ... [2021-05-02 14:49:44,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4556e664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:44, skipping insertion in model container [2021-05-02 14:49:44,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:49:44" (1/1) ... [2021-05-02 14:49:44,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:49:44,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:49:44,776 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/egcd-ll_valuebound50.c[489,502] [2021-05-02 14:49:44,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:49:44,791 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:49:44,798 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/egcd-ll_valuebound50.c[489,502] [2021-05-02 14:49:44,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:49:44,811 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:49:44,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:44 WrapperNode [2021-05-02 14:49:44,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:49:44,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:49:44,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:49:44,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:49:44,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:44" (1/1) ... [2021-05-02 14:49:44,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:44" (1/1) ... [2021-05-02 14:49:44,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:44" (1/1) ... [2021-05-02 14:49:44,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:44" (1/1) ... [2021-05-02 14:49:44,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:44" (1/1) ... [2021-05-02 14:49:44,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:44" (1/1) ... [2021-05-02 14:49:44,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:44" (1/1) ... [2021-05-02 14:49:44,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:49:44,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:49:44,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:49:44,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:49:44,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:49:44,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:49:44,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:49:44,941 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:49:44,941 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:49:44,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:49:44,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:49:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:49:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:49:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:49:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:49:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:49:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:49:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:49:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:49:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:49:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:49:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:49:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:49:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:49:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:49:45,177 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:49:45,178 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 14:49:45,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:49:45 BoogieIcfgContainer [2021-05-02 14:49:45,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:49:45,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:49:45,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:49:45,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:49:45,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:49:44" (1/3) ... [2021-05-02 14:49:45,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a0c747c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:49:45, skipping insertion in model container [2021-05-02 14:49:45,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:49:44" (2/3) ... [2021-05-02 14:49:45,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a0c747c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:49:45, skipping insertion in model container [2021-05-02 14:49:45,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:49:45" (3/3) ... [2021-05-02 14:49:45,183 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound50.c [2021-05-02 14:49:45,187 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:49:45,189 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:49:45,199 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:49:45,213 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:49:45,213 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:49:45,213 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:49:45,213 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:49:45,213 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:49:45,213 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:49:45,213 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:49:45,213 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:49:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 14:49:45,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:49:45,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:45,227 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:45,227 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:45,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:45,230 INFO L82 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2021-05-02 14:49:45,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:45,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397132065] [2021-05-02 14:49:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:45,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:49:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:45,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:49:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:45,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:49:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:45,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:49:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:45,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:49:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:49:45,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:45,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397132065] [2021-05-02 14:49:45,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397132065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:49:45,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:49:45,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:49:45,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321793595] [2021-05-02 14:49:45,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:49:45,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:45,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:49:45,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:49:45,444 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:45,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:45,530 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-05-02 14:49:45,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:49:45,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 14:49:45,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:45,536 INFO L225 Difference]: With dead ends: 67 [2021-05-02 14:49:45,536 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 14:49:45,538 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:49:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 14:49:45,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 14:49:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:49:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 14:49:45,566 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-02 14:49:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:45,567 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 14:49:45,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:49:45,567 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 14:49:45,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:49:45,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:45,568 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:45,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:49:45,569 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:45,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:45,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2021-05-02 14:49:45,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:45,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923647791] [2021-05-02 14:49:45,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:45,584 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:45,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680446836] [2021-05-02 14:49:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:45,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:49:45,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:45,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:49:45,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:45,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923647791] [2021-05-02 14:49:45,761 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:45,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680446836] [2021-05-02 14:49:45,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680446836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:45,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:45,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:49:45,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917940233] [2021-05-02 14:49:45,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:49:45,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:45,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:49:45,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:49:45,763 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 14:49:45,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:45,851 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-05-02 14:49:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:49:45,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-02 14:49:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:45,853 INFO L225 Difference]: With dead ends: 48 [2021-05-02 14:49:45,853 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 14:49:45,855 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:49:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 14:49:45,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 14:49:45,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:49:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-02 14:49:45,868 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-02 14:49:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:45,869 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-02 14:49:45,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 14:49:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-02 14:49:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 14:49:45,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:45,870 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:46,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:49:46,077 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:46,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:46,078 INFO L82 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2021-05-02 14:49:46,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:46,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359275077] [2021-05-02 14:49:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:46,089 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:46,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339044741] [2021-05-02 14:49:46,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:46,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 14:49:46,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:46,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:49:46,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:46,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359275077] [2021-05-02 14:49:46,381 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:46,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339044741] [2021-05-02 14:49:46,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339044741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:46,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:46,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:49:46,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370011453] [2021-05-02 14:49:46,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:49:46,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:46,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:49:46,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:46,383 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 14:49:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:46,523 INFO L93 Difference]: Finished difference Result 70 states and 102 transitions. [2021-05-02 14:49:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:49:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-05-02 14:49:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:46,529 INFO L225 Difference]: With dead ends: 70 [2021-05-02 14:49:46,529 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 14:49:46,530 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 14:49:46,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-02 14:49:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 14:49:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-02 14:49:46,561 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-02 14:49:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:46,561 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-02 14:49:46,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 14:49:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-02 14:49:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:49:46,563 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:46,564 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:46,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:46,765 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:46,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2021-05-02 14:49:46,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:46,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614527814] [2021-05-02 14:49:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:46,780 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:46,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081251833] [2021-05-02 14:49:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:46,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:49:46,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:46,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:49:46,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:46,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614527814] [2021-05-02 14:49:46,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:46,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081251833] [2021-05-02 14:49:46,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081251833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:46,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:46,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:49:46,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508508183] [2021-05-02 14:49:46,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:49:46,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:46,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:49:46,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:49:46,960 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:49:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:47,072 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-05-02 14:49:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:49:47,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2021-05-02 14:49:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:47,075 INFO L225 Difference]: With dead ends: 68 [2021-05-02 14:49:47,075 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 14:49:47,078 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:49:47,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 14:49:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 14:49:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:49:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-02 14:49:47,092 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-02 14:49:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:47,094 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-02 14:49:47,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:49:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-02 14:49:47,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 14:49:47,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:47,095 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:47,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:47,305 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:47,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:47,305 INFO L82 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2021-05-02 14:49:47,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:47,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151701746] [2021-05-02 14:49:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:47,317 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:47,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044504056] [2021-05-02 14:49:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:47,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 14:49:47,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:49:47,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:47,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151701746] [2021-05-02 14:49:47,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:47,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044504056] [2021-05-02 14:49:47,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044504056] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:49:47,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:49:47,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:49:47,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079484596] [2021-05-02 14:49:47,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:49:47,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:47,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:49:47,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:49:47,462 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 14:49:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:47,493 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-05-02 14:49:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:49:47,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-02 14:49:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:47,496 INFO L225 Difference]: With dead ends: 70 [2021-05-02 14:49:47,496 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 14:49:47,496 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:49:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 14:49:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 14:49:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:49:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-02 14:49:47,510 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-02 14:49:47,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:47,511 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-02 14:49:47,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 14:49:47,511 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-02 14:49:47,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 14:49:47,511 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:47,512 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:47,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:47,729 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:47,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:47,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1107651435, now seen corresponding path program 1 times [2021-05-02 14:49:47,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:47,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317676870] [2021-05-02 14:49:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:47,742 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:47,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354345370] [2021-05-02 14:49:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:47,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:49:47,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:47,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 14:49:47,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:47,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317676870] [2021-05-02 14:49:47,899 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:47,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354345370] [2021-05-02 14:49:47,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354345370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:47,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:47,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:49:47,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437778881] [2021-05-02 14:49:47,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:49:47,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:47,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:49:47,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:49:47,901 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 14:49:47,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:47,968 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-05-02 14:49:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:49:47,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-02 14:49:47,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:47,970 INFO L225 Difference]: With dead ends: 84 [2021-05-02 14:49:47,970 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 14:49:47,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:49:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 14:49:47,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-02 14:49:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 14:49:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 14:49:47,983 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-02 14:49:47,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:47,984 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 14:49:47,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 14:49:47,984 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 14:49:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 14:49:47,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:47,986 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:48,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:49:48,201 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:48,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2021-05-02 14:49:48,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:48,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586713308] [2021-05-02 14:49:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:48,209 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:48,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295257516] [2021-05-02 14:49:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:48,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 14:49:48,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:48,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:49:48,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:48,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586713308] [2021-05-02 14:49:48,389 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:48,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295257516] [2021-05-02 14:49:48,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295257516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:48,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:48,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:49:48,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739550653] [2021-05-02 14:49:48,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:49:48,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:48,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:49:48,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:49:48,391 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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), 3 states have call successors, (9) [2021-05-02 14:49:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:48,494 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2021-05-02 14:49:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:49:48,494 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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), 3 states have call successors, (9) Word has length 54 [2021-05-02 14:49:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:48,495 INFO L225 Difference]: With dead ends: 88 [2021-05-02 14:49:48,495 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 14:49:48,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:49:48,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 14:49:48,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 14:49:48,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 14:49:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-02 14:49:48,504 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-02 14:49:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:48,505 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-02 14:49:48,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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), 3 states have call successors, (9) [2021-05-02 14:49:48,505 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-02 14:49:48,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 14:49:48,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:48,505 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:48,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:48,722 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:48,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:48,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 1 times [2021-05-02 14:49:48,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:48,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619225460] [2021-05-02 14:49:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:48,730 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:48,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277257535] [2021-05-02 14:49:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:48,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:49:48,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:48,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 14:49:48,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:48,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619225460] [2021-05-02 14:49:48,991 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:48,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277257535] [2021-05-02 14:49:48,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277257535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:48,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:48,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:49:48,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814190325] [2021-05-02 14:49:48,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:49:48,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:48,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:49:48,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:48,993 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 14:49:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:49,201 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2021-05-02 14:49:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:49:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2021-05-02 14:49:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:49,202 INFO L225 Difference]: With dead ends: 118 [2021-05-02 14:49:49,202 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 14:49:49,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:49:49,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 14:49:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-02 14:49:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 14:49:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-02 14:49:49,235 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-02 14:49:49,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:49,235 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-02 14:49:49,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 14:49:49,236 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-02 14:49:49,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:49:49,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:49,236 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:49,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:49,449 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2021-05-02 14:49:49,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:49,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143087425] [2021-05-02 14:49:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:49,456 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:49,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955097219] [2021-05-02 14:49:49,456 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:49,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:49:49,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:49,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 14:49:49,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:49,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 14:49:49,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:49,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143087425] [2021-05-02 14:49:49,669 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:49,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955097219] [2021-05-02 14:49:49,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955097219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:49,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:49,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:49:49,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206050858] [2021-05-02 14:49:49,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:49:49,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:49,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:49:49,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:49,670 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:49:49,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:49,794 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2021-05-02 14:49:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:49:49,795 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 61 [2021-05-02 14:49:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:49,796 INFO L225 Difference]: With dead ends: 137 [2021-05-02 14:49:49,796 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 14:49:49,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 14:49:49,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-02 14:49:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 14:49:49,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-02 14:49:49,807 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-02 14:49:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:49,807 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-02 14:49:49,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:49:49,807 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-02 14:49:49,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:49:49,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:49,808 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:50,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:49:50,021 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:50,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:50,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2021-05-02 14:49:50,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:50,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119447453] [2021-05-02 14:49:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:50,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:50,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898935017] [2021-05-02 14:49:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:50,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:49:50,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:50,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 14:49:50,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:50,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119447453] [2021-05-02 14:49:50,243 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:50,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898935017] [2021-05-02 14:49:50,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898935017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:50,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:50,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:49:50,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394843579] [2021-05-02 14:49:50,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:49:50,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:50,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:49:50,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:50,245 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:49:50,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:50,414 INFO L93 Difference]: Finished difference Result 151 states and 193 transitions. [2021-05-02 14:49:50,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:49:50,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 14:49:50,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:50,415 INFO L225 Difference]: With dead ends: 151 [2021-05-02 14:49:50,415 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 14:49:50,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:49:50,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 14:49:50,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 14:49:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 86 states have internal predecessors, (95), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 14:49:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2021-05-02 14:49:50,427 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 69 [2021-05-02 14:49:50,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:50,427 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2021-05-02 14:49:50,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:49:50,427 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2021-05-02 14:49:50,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:49:50,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:50,428 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:50,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:50,641 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:50,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1872855628, now seen corresponding path program 2 times [2021-05-02 14:49:50,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:50,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525768044] [2021-05-02 14:49:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:50,648 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:50,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918082141] [2021-05-02 14:49:50,648 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:50,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:49:50,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:50,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:49:50,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:50,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 14:49:50,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:50,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525768044] [2021-05-02 14:49:50,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:50,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918082141] [2021-05-02 14:49:50,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918082141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:50,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:50,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:49:50,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352800789] [2021-05-02 14:49:50,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:49:50,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:50,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:49:50,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:50,859 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:49:51,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:51,065 INFO L93 Difference]: Finished difference Result 166 states and 212 transitions. [2021-05-02 14:49:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:49:51,065 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 14:49:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:51,066 INFO L225 Difference]: With dead ends: 166 [2021-05-02 14:49:51,066 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 14:49:51,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:49:51,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 14:49:51,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-02 14:49:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 94 states have internal predecessors, (103), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 14:49:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-02 14:49:51,078 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 69 [2021-05-02 14:49:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:51,078 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-02 14:49:51,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:49:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-02 14:49:51,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:49:51,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:51,079 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:51,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:51,293 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:51,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:51,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 2 times [2021-05-02 14:49:51,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:51,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977956134] [2021-05-02 14:49:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:51,300 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:51,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646093225] [2021-05-02 14:49:51,300 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 14:49:51,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:49:51,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:51,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 14:49:51,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:51,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 14:49:51,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:51,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977956134] [2021-05-02 14:49:51,559 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:51,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646093225] [2021-05-02 14:49:51,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646093225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:51,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:51,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:49:51,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924350181] [2021-05-02 14:49:51,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:49:51,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:51,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:49:51,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:49:51,560 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:49:51,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:51,752 INFO L93 Difference]: Finished difference Result 190 states and 241 transitions. [2021-05-02 14:49:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:49:51,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-02 14:49:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:51,753 INFO L225 Difference]: With dead ends: 190 [2021-05-02 14:49:51,753 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 14:49:51,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:49:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 14:49:51,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-05-02 14:49:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 14:49:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-02 14:49:51,773 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 74 [2021-05-02 14:49:51,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:51,773 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-02 14:49:51,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:49:51,774 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-02 14:49:51,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:49:51,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:51,775 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:51,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:49:51,981 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:51,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:51,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2021-05-02 14:49:51,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:51,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547556405] [2021-05-02 14:49:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:51,988 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:51,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526077369] [2021-05-02 14:49:51,988 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:52,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:49:52,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:52,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:49:52,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:52,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-05-02 14:49:52,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:52,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547556405] [2021-05-02 14:49:52,292 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:52,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526077369] [2021-05-02 14:49:52,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526077369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:52,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:52,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:49:52,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057410530] [2021-05-02 14:49:52,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:49:52,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:52,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:49:52,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:52,293 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 14:49:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:52,499 INFO L93 Difference]: Finished difference Result 213 states and 266 transitions. [2021-05-02 14:49:52,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:49:52,499 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-02 14:49:52,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:52,500 INFO L225 Difference]: With dead ends: 213 [2021-05-02 14:49:52,500 INFO L226 Difference]: Without dead ends: 211 [2021-05-02 14:49:52,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-02 14:49:52,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-05-02 14:49:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 119 states have internal predecessors, (132), 57 states have call successors, (57), 26 states have call predecessors, (57), 25 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 14:49:52,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-05-02 14:49:52,528 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 74 [2021-05-02 14:49:52,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:52,529 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-05-02 14:49:52,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 14:49:52,529 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-05-02 14:49:52,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 14:49:52,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:52,529 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:52,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:49:52,745 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:52,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:52,746 INFO L82 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 4 times [2021-05-02 14:49:52,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:52,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195487105] [2021-05-02 14:49:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:52,751 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:52,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423638923] [2021-05-02 14:49:52,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:52,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:49:52,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:52,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 14:49:52,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:52,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:52,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-02 14:49:53,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:53,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195487105] [2021-05-02 14:49:53,027 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:53,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423638923] [2021-05-02 14:49:53,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423638923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:53,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:53,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:49:53,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353483727] [2021-05-02 14:49:53,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:49:53,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:53,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:49:53,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:49:53,028 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:49:53,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:53,336 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2021-05-02 14:49:53,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:49:53,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 14:49:53,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:53,337 INFO L225 Difference]: With dead ends: 219 [2021-05-02 14:49:53,337 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 14:49:53,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:49:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 14:49:53,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-02 14:49:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 103 states have (on average 1.145631067961165) internal successors, (118), 107 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 14:49:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-05-02 14:49:53,350 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 79 [2021-05-02 14:49:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:53,350 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-05-02 14:49:53,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:49:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-05-02 14:49:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 14:49:53,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:53,351 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:49:53,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:49:53,557 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:53,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2021-05-02 14:49:53,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:53,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214604942] [2021-05-02 14:49:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:53,563 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:53,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045618332] [2021-05-02 14:49:53,563 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 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 14:49:53,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:49:53,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:53,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 14:49:53,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:53,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-02 14:49:53,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:53,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214604942] [2021-05-02 14:49:53,787 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:53,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045618332] [2021-05-02 14:49:53,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045618332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:53,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:53,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:49:53,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625442943] [2021-05-02 14:49:53,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:49:53,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:53,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:49:53,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:49:53,788 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:49:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:54,090 INFO L93 Difference]: Finished difference Result 209 states and 258 transitions. [2021-05-02 14:49:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:49:54,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 14:49:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:54,092 INFO L225 Difference]: With dead ends: 209 [2021-05-02 14:49:54,092 INFO L226 Difference]: Without dead ends: 202 [2021-05-02 14:49:54,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:49:54,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-02 14:49:54,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2021-05-02 14:49:54,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 118 states have (on average 1.152542372881356) internal successors, (136), 122 states have internal predecessors, (136), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 14:49:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 241 transitions. [2021-05-02 14:49:54,110 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 241 transitions. Word has length 79 [2021-05-02 14:49:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:54,110 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 241 transitions. [2021-05-02 14:49:54,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:49:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 241 transitions. [2021-05-02 14:49:54,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:49:54,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:54,111 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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] [2021-05-02 14:49:54,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:54,325 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:54,325 INFO L82 PathProgramCache]: Analyzing trace with hash -105752765, now seen corresponding path program 5 times [2021-05-02 14:49:54,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:54,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743122360] [2021-05-02 14:49:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:54,331 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:54,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141656563] [2021-05-02 14:49:54,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:54,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 14:49:54,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:54,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:49:54,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:54,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 14:49:54,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:54,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743122360] [2021-05-02 14:49:54,530 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:54,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141656563] [2021-05-02 14:49:54,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141656563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:54,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:54,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:49:54,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314914129] [2021-05-02 14:49:54,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:49:54,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:54,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:49:54,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:49:54,531 INFO L87 Difference]: Start difference. First operand 199 states and 241 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:49:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:54,665 INFO L93 Difference]: Finished difference Result 231 states and 288 transitions. [2021-05-02 14:49:54,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:49:54,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-05-02 14:49:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:54,667 INFO L225 Difference]: With dead ends: 231 [2021-05-02 14:49:54,667 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 14:49:54,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:54,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 14:49:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 216. [2021-05-02 14:49:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 125 states have (on average 1.16) internal successors, (145), 130 states have internal predecessors, (145), 63 states have call successors, (63), 28 states have call predecessors, (63), 27 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:49:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 268 transitions. [2021-05-02 14:49:54,683 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 268 transitions. Word has length 87 [2021-05-02 14:49:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:54,683 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 268 transitions. [2021-05-02 14:49:54,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:49:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 268 transitions. [2021-05-02 14:49:54,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:49:54,684 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:54,684 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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] [2021-05-02 14:49:54,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:49:54,897 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:54,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:54,897 INFO L82 PathProgramCache]: Analyzing trace with hash -297024573, now seen corresponding path program 6 times [2021-05-02 14:49:54,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:54,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8395508] [2021-05-02 14:49:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:54,903 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:54,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111685746] [2021-05-02 14:49:54,903 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 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 14:49:54,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-02 14:49:54,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:54,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:49:54,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:55,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:49:55,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:55,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8395508] [2021-05-02 14:49:55,141 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:55,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111685746] [2021-05-02 14:49:55,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111685746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:55,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:55,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:49:55,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087975985] [2021-05-02 14:49:55,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:49:55,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:55,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:49:55,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:49:55,143 INFO L87 Difference]: Start difference. First operand 216 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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 14:49:55,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:55,381 INFO L93 Difference]: Finished difference Result 241 states and 302 transitions. [2021-05-02 14:49:55,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:49:55,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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 87 [2021-05-02 14:49:55,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:55,383 INFO L225 Difference]: With dead ends: 241 [2021-05-02 14:49:55,383 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 14:49:55,383 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:49:55,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 14:49:55,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-05-02 14:49:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 136 states have (on average 1.1544117647058822) internal successors, (157), 141 states have internal predecessors, (157), 69 states have call successors, (69), 30 states have call predecessors, (69), 29 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 14:49:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 292 transitions. [2021-05-02 14:49:55,400 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 292 transitions. Word has length 87 [2021-05-02 14:49:55,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:55,400 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 292 transitions. [2021-05-02 14:49:55,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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 14:49:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 292 transitions. [2021-05-02 14:49:55,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:49:55,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:55,401 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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] [2021-05-02 14:49:55,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:49:55,609 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:55,610 INFO L82 PathProgramCache]: Analyzing trace with hash -239766271, now seen corresponding path program 7 times [2021-05-02 14:49:55,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:55,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256401107] [2021-05-02 14:49:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:55,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:55,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83652906] [2021-05-02 14:49:55,616 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 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 14:49:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:55,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:49:55,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:55,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:49:55,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:55,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256401107] [2021-05-02 14:49:55,891 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:55,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83652906] [2021-05-02 14:49:55,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83652906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:55,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:55,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:49:55,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129964761] [2021-05-02 14:49:55,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:49:55,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:55,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:49:55,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:55,893 INFO L87 Difference]: Start difference. First operand 235 states and 292 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:49:56,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:56,168 INFO L93 Difference]: Finished difference Result 251 states and 315 transitions. [2021-05-02 14:49:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:49:56,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2021-05-02 14:49:56,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:56,169 INFO L225 Difference]: With dead ends: 251 [2021-05-02 14:49:56,169 INFO L226 Difference]: Without dead ends: 249 [2021-05-02 14:49:56,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:49:56,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-02 14:49:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2021-05-02 14:49:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:49:56,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 14:49:56,187 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 14:49:56,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:56,187 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 14:49:56,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:49:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 14:49:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:49:56,188 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:56,188 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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] [2021-05-02 14:49:56,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:49:56,406 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:56,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:56,406 INFO L82 PathProgramCache]: Analyzing trace with hash 85135427, now seen corresponding path program 8 times [2021-05-02 14:49:56,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:56,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639661536] [2021-05-02 14:49:56,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:56,412 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:56,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628983067] [2021-05-02 14:49:56,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:56,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:49:56,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:56,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:49:56,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:56,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:49:56,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:56,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639661536] [2021-05-02 14:49:56,651 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:56,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628983067] [2021-05-02 14:49:56,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628983067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:56,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:56,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:49:56,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376655442] [2021-05-02 14:49:56,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:49:56,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:56,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:49:56,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:56,653 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 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 14:49:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:56,914 INFO L93 Difference]: Finished difference Result 262 states and 331 transitions. [2021-05-02 14:49:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:49:56,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 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 87 [2021-05-02 14:49:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:56,915 INFO L225 Difference]: With dead ends: 262 [2021-05-02 14:49:56,915 INFO L226 Difference]: Without dead ends: 257 [2021-05-02 14:49:56,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:49:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-02 14:49:56,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 247. [2021-05-02 14:49:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:49:56,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 14:49:56,932 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 14:49:56,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:56,933 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 14:49:56,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 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 14:49:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 14:49:56,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:49:56,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:56,933 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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] [2021-05-02 14:49:57,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:57,149 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:57,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash 142393729, now seen corresponding path program 9 times [2021-05-02 14:49:57,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:57,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982034395] [2021-05-02 14:49:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:57,154 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:57,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099971772] [2021-05-02 14:49:57,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:57,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:49:57,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:57,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 14:49:57,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:57,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-02 14:49:57,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:57,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982034395] [2021-05-02 14:49:57,361 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:57,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099971772] [2021-05-02 14:49:57,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099971772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:57,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:57,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:49:57,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415711466] [2021-05-02 14:49:57,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:49:57,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:57,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:49:57,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:57,362 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:50:03,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:03,574 INFO L93 Difference]: Finished difference Result 253 states and 315 transitions. [2021-05-02 14:50:03,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:50:03,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-02 14:50:03,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:03,576 INFO L225 Difference]: With dead ends: 253 [2021-05-02 14:50:03,576 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 14:50:03,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:50:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 14:50:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 228. [2021-05-02 14:50:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 141 states have internal predecessors, (154), 61 states have call successors, (61), 31 states have call predecessors, (61), 30 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 14:50:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 274 transitions. [2021-05-02 14:50:03,592 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 274 transitions. Word has length 87 [2021-05-02 14:50:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:03,592 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 274 transitions. [2021-05-02 14:50:03,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:50:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 274 transitions. [2021-05-02 14:50:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:50:03,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:03,593 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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] [2021-05-02 14:50:03,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:03,808 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:03,809 INFO L82 PathProgramCache]: Analyzing trace with hash -48878079, now seen corresponding path program 10 times [2021-05-02 14:50:03,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:03,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784613974] [2021-05-02 14:50:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:03,814 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:03,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453089380] [2021-05-02 14:50:03,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:03,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:50:03,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:03,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 14:50:03,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:03,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:03,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:50:04,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:04,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784613974] [2021-05-02 14:50:04,091 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:04,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453089380] [2021-05-02 14:50:04,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453089380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:04,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:04,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:50:04,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575254919] [2021-05-02 14:50:04,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:50:04,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:04,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:50:04,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:50:04,092 INFO L87 Difference]: Start difference. First operand 228 states and 274 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:50:04,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:04,366 INFO L93 Difference]: Finished difference Result 240 states and 289 transitions. [2021-05-02 14:50:04,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:50:04,367 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2021-05-02 14:50:04,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:04,368 INFO L225 Difference]: With dead ends: 240 [2021-05-02 14:50:04,368 INFO L226 Difference]: Without dead ends: 238 [2021-05-02 14:50:04,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:50:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-02 14:50:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2021-05-02 14:50:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 146 states have internal predecessors, (158), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:50:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2021-05-02 14:50:04,384 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 87 [2021-05-02 14:50:04,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:04,384 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2021-05-02 14:50:04,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:50:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2021-05-02 14:50:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:50:04,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:04,385 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:04,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 14:50:04,593 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:04,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:04,593 INFO L82 PathProgramCache]: Analyzing trace with hash 418671986, now seen corresponding path program 3 times [2021-05-02 14:50:04,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:04,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844217758] [2021-05-02 14:50:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:04,598 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:04,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879734348] [2021-05-02 14:50:04,598 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 14:50:04,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:50:04,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:04,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 14:50:04,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:04,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 82 proven. 18 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-02 14:50:04,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:04,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844217758] [2021-05-02 14:50:04,837 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:04,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879734348] [2021-05-02 14:50:04,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879734348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:04,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:04,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:50:04,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327884595] [2021-05-02 14:50:04,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:50:04,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:04,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:50:04,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:50:04,838 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:50:09,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:09,058 INFO L93 Difference]: Finished difference Result 268 states and 323 transitions. [2021-05-02 14:50:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:50:09,058 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 92 [2021-05-02 14:50:09,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:09,059 INFO L225 Difference]: With dead ends: 268 [2021-05-02 14:50:09,059 INFO L226 Difference]: Without dead ends: 266 [2021-05-02 14:50:09,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:50:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-02 14:50:09,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 252. [2021-05-02 14:50:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 152 states have (on average 1.131578947368421) internal successors, (172), 158 states have internal predecessors, (172), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-02 14:50:09,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 300 transitions. [2021-05-02 14:50:09,078 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 300 transitions. Word has length 92 [2021-05-02 14:50:09,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:09,078 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 300 transitions. [2021-05-02 14:50:09,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:50:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 300 transitions. [2021-05-02 14:50:09,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:50:09,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:09,079 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:09,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:50:09,294 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:09,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:09,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 11 times [2021-05-02 14:50:09,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:09,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058091045] [2021-05-02 14:50:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:09,299 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:09,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440139149] [2021-05-02 14:50:09,299 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:09,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 14:50:09,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:09,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 14:50:09,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:09,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 14:50:09,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:09,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058091045] [2021-05-02 14:50:09,687 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:09,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440139149] [2021-05-02 14:50:09,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440139149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:09,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:09,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:50:09,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257418072] [2021-05-02 14:50:09,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:50:09,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:09,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:50:09,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:50:09,688 INFO L87 Difference]: Start difference. First operand 252 states and 300 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:50:10,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:10,087 INFO L93 Difference]: Finished difference Result 282 states and 339 transitions. [2021-05-02 14:50:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:50:10,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-02 14:50:10,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:10,092 INFO L225 Difference]: With dead ends: 282 [2021-05-02 14:50:10,093 INFO L226 Difference]: Without dead ends: 280 [2021-05-02 14:50:10,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:50:10,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-02 14:50:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 266. [2021-05-02 14:50:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 161 states have (on average 1.1304347826086956) internal successors, (182), 167 states have internal predecessors, (182), 68 states have call successors, (68), 37 states have call predecessors, (68), 36 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 14:50:10,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 316 transitions. [2021-05-02 14:50:10,111 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 316 transitions. Word has length 92 [2021-05-02 14:50:10,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:10,111 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 316 transitions. [2021-05-02 14:50:10,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:50:10,111 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 316 transitions. [2021-05-02 14:50:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:50:10,112 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:10,112 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:10,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:10,328 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:10,328 INFO L82 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 12 times [2021-05-02 14:50:10,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:10,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389062024] [2021-05-02 14:50:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:10,335 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:10,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088486590] [2021-05-02 14:50:10,335 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:10,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 14:50:10,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:10,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 14:50:10,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:10,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 42 proven. 47 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 14:50:10,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:10,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389062024] [2021-05-02 14:50:10,616 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:10,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088486590] [2021-05-02 14:50:10,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088486590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:10,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:10,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:50:10,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868833579] [2021-05-02 14:50:10,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:50:10,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:10,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:50:10,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:50:10,618 INFO L87 Difference]: Start difference. First operand 266 states and 316 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:50:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:16,945 INFO L93 Difference]: Finished difference Result 324 states and 404 transitions. [2021-05-02 14:50:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:50:16,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 92 [2021-05-02 14:50:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:16,946 INFO L225 Difference]: With dead ends: 324 [2021-05-02 14:50:16,946 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 14:50:16,947 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:50:16,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 14:50:16,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 280. [2021-05-02 14:50:16,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 167 states have (on average 1.1377245508982037) internal successors, (190), 173 states have internal predecessors, (190), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 14:50:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 340 transitions. [2021-05-02 14:50:16,967 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 340 transitions. Word has length 92 [2021-05-02 14:50:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:16,967 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 340 transitions. [2021-05-02 14:50:16,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:50:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 340 transitions. [2021-05-02 14:50:16,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:50:16,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:16,968 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:17,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 14:50:17,181 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:17,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:17,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 13 times [2021-05-02 14:50:17,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:17,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846038501] [2021-05-02 14:50:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:17,188 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:17,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234704935] [2021-05-02 14:50:17,189 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:17,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 14:50:17,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:17,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 14:50:17,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:17,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846038501] [2021-05-02 14:50:17,534 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:17,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234704935] [2021-05-02 14:50:17,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234704935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:17,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:17,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:50:17,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397980981] [2021-05-02 14:50:17,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:50:17,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:50:17,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:50:17,535 INFO L87 Difference]: Start difference. First operand 280 states and 340 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:50:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:17,822 INFO L93 Difference]: Finished difference Result 304 states and 369 transitions. [2021-05-02 14:50:17,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:50:17,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-02 14:50:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:17,824 INFO L225 Difference]: With dead ends: 304 [2021-05-02 14:50:17,824 INFO L226 Difference]: Without dead ends: 302 [2021-05-02 14:50:17,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:50:17,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-02 14:50:17,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 288. [2021-05-02 14:50:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 173 states have (on average 1.1329479768786128) internal successors, (196), 179 states have internal predecessors, (196), 76 states have call successors, (76), 39 states have call predecessors, (76), 38 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 14:50:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 346 transitions. [2021-05-02 14:50:17,847 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 346 transitions. Word has length 92 [2021-05-02 14:50:17,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:17,847 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 346 transitions. [2021-05-02 14:50:17,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:50:17,847 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 346 transitions. [2021-05-02 14:50:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:50:17,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:17,847 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:18,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:18,065 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash -87157341, now seen corresponding path program 14 times [2021-05-02 14:50:18,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:18,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429196491] [2021-05-02 14:50:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:18,069 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:18,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351334161] [2021-05-02 14:50:18,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:18,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:50:18,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:18,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 14:50:18,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:18,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-02 14:50:18,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:18,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429196491] [2021-05-02 14:50:18,365 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:18,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351334161] [2021-05-02 14:50:18,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351334161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:18,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:18,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:50:18,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576745226] [2021-05-02 14:50:18,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:50:18,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:18,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:50:18,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:50:18,369 INFO L87 Difference]: Start difference. First operand 288 states and 346 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 14:50:18,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:18,626 INFO L93 Difference]: Finished difference Result 328 states and 399 transitions. [2021-05-02 14:50:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:50:18,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 14:50:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:18,627 INFO L225 Difference]: With dead ends: 328 [2021-05-02 14:50:18,628 INFO L226 Difference]: Without dead ends: 322 [2021-05-02 14:50:18,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:50:18,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-02 14:50:18,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-05-02 14:50:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 194 states have (on average 1.134020618556701) internal successors, (220), 200 states have internal predecessors, (220), 85 states have call successors, (85), 43 states have call predecessors, (85), 42 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-02 14:50:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 388 transitions. [2021-05-02 14:50:18,651 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 388 transitions. Word has length 97 [2021-05-02 14:50:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:18,651 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 388 transitions. [2021-05-02 14:50:18,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 14:50:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 388 transitions. [2021-05-02 14:50:18,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:50:18,652 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:18,652 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:18,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 14:50:18,869 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:18,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:18,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 15 times [2021-05-02 14:50:18,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:18,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148097093] [2021-05-02 14:50:18,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:18,875 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:18,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202629672] [2021-05-02 14:50:18,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:18,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:50:18,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:50:18,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 14:50:18,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:25,317 WARN L205 SmtUtils]: Spent 4.14 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 14:50:25,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 14:50:25,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:25,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148097093] [2021-05-02 14:50:25,354 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:25,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202629672] [2021-05-02 14:50:25,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202629672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:25,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:25,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:50:25,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420635055] [2021-05-02 14:50:25,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:50:25,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:25,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:50:25,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=87, Unknown=1, NotChecked=0, Total=110 [2021-05-02 14:50:25,355 INFO L87 Difference]: Start difference. First operand 322 states and 388 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:50:55,906 WARN L205 SmtUtils]: Spent 16.18 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-02 14:51:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:04,169 INFO L93 Difference]: Finished difference Result 359 states and 449 transitions. [2021-05-02 14:51:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:51:04,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 97 [2021-05-02 14:51:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:04,171 INFO L225 Difference]: With dead ends: 359 [2021-05-02 14:51:04,171 INFO L226 Difference]: Without dead ends: 353 [2021-05-02 14:51:04,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 22443.2ms TimeCoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2021-05-02 14:51:04,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-02 14:51:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 345. [2021-05-02 14:51:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 207 states have (on average 1.1545893719806763) internal successors, (239), 213 states have internal predecessors, (239), 94 states have call successors, (94), 44 states have call predecessors, (94), 43 states have return successors, (92), 87 states have call predecessors, (92), 92 states have call successors, (92) [2021-05-02 14:51:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 425 transitions. [2021-05-02 14:51:04,201 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 425 transitions. Word has length 97 [2021-05-02 14:51:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:04,201 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 425 transitions. [2021-05-02 14:51:04,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 425 transitions. [2021-05-02 14:51:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:51:04,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:04,202 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:04,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 14:51:04,409 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:04,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:04,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 16 times [2021-05-02 14:51:04,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:04,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752441120] [2021-05-02 14:51:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:04,413 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:04,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326913607] [2021-05-02 14:51:04,414 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:04,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:51:04,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:04,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-02 14:51:04,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:04,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 51 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-05-02 14:51:09,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:09,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752441120] [2021-05-02 14:51:09,923 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:09,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326913607] [2021-05-02 14:51:09,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326913607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:09,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:09,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:51:09,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554386727] [2021-05-02 14:51:09,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:51:09,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:09,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:51:09,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:51:09,924 INFO L87 Difference]: Start difference. First operand 345 states and 425 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 14:51:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:10,740 INFO L93 Difference]: Finished difference Result 383 states and 475 transitions. [2021-05-02 14:51:10,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:51:10,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 14:51:10,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:10,742 INFO L225 Difference]: With dead ends: 383 [2021-05-02 14:51:10,742 INFO L226 Difference]: Without dead ends: 373 [2021-05-02 14:51:10,743 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:51:10,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-02 14:51:10,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 355. [2021-05-02 14:51:10,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 214 states have (on average 1.1495327102803738) internal successors, (246), 221 states have internal predecessors, (246), 95 states have call successors, (95), 46 states have call predecessors, (95), 45 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-02 14:51:10,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 434 transitions. [2021-05-02 14:51:10,772 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 434 transitions. Word has length 97 [2021-05-02 14:51:10,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:10,772 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 434 transitions. [2021-05-02 14:51:10,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 14:51:10,772 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 434 transitions. [2021-05-02 14:51:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:51:10,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:10,773 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:10,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 14:51:10,988 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:10,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:10,989 INFO L82 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 4 times [2021-05-02 14:51:10,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:10,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805528391] [2021-05-02 14:51:10,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:10,994 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:10,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225970257] [2021-05-02 14:51:10,994 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:11,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:51:11,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:11,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 14:51:11,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 61 proven. 72 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-05-02 14:51:11,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:11,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805528391] [2021-05-02 14:51:11,525 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:11,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225970257] [2021-05-02 14:51:11,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225970257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:11,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:11,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:51:11,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264903] [2021-05-02 14:51:11,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:51:11,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:11,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:51:11,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:51:11,526 INFO L87 Difference]: Start difference. First operand 355 states and 434 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 14:51:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:12,085 INFO L93 Difference]: Finished difference Result 392 states and 495 transitions. [2021-05-02 14:51:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:51:12,085 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 14:51:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:12,089 INFO L225 Difference]: With dead ends: 392 [2021-05-02 14:51:12,089 INFO L226 Difference]: Without dead ends: 383 [2021-05-02 14:51:12,090 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:51:12,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-02 14:51:12,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2021-05-02 14:51:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 229 states have (on average 1.1572052401746724) internal successors, (265), 236 states have internal predecessors, (265), 107 states have call successors, (107), 47 states have call predecessors, (107), 46 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2021-05-02 14:51:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 477 transitions. [2021-05-02 14:51:12,123 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 477 transitions. Word has length 97 [2021-05-02 14:51:12,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:12,123 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 477 transitions. [2021-05-02 14:51:12,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 14:51:12,124 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 477 transitions. [2021-05-02 14:51:12,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 14:51:12,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:12,125 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 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] [2021-05-02 14:51:12,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 14:51:12,340 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:12,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:12,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1283771014, now seen corresponding path program 17 times [2021-05-02 14:51:12,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:12,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122895242] [2021-05-02 14:51:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:12,345 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:12,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676194306] [2021-05-02 14:51:12,345 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:12,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-02 14:51:12,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:12,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 14:51:12,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-02 14:51:13,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:13,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122895242] [2021-05-02 14:51:13,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:13,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676194306] [2021-05-02 14:51:13,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676194306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:13,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:13,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:51:13,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957496363] [2021-05-02 14:51:13,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:51:13,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:13,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:51:13,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:51:13,045 INFO L87 Difference]: Start difference. First operand 383 states and 477 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:51:13,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:13,225 INFO L93 Difference]: Finished difference Result 399 states and 495 transitions. [2021-05-02 14:51:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:51:13,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 105 [2021-05-02 14:51:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:13,226 INFO L225 Difference]: With dead ends: 399 [2021-05-02 14:51:13,226 INFO L226 Difference]: Without dead ends: 397 [2021-05-02 14:51:13,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:51:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-05-02 14:51:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2021-05-02 14:51:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 236 states have (on average 1.152542372881356) internal successors, (272), 244 states have internal predecessors, (272), 108 states have call successors, (108), 49 states have call predecessors, (108), 48 states have return successors, (106), 99 states have call predecessors, (106), 106 states have call successors, (106) [2021-05-02 14:51:13,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 486 transitions. [2021-05-02 14:51:13,264 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 486 transitions. Word has length 105 [2021-05-02 14:51:13,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:13,264 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 486 transitions. [2021-05-02 14:51:13,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:51:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 486 transitions. [2021-05-02 14:51:13,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 14:51:13,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:13,265 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 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] [2021-05-02 14:51:13,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 14:51:13,470 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:13,470 INFO L82 PathProgramCache]: Analyzing trace with hash -901611014, now seen corresponding path program 18 times [2021-05-02 14:51:13,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:13,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931484189] [2021-05-02 14:51:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:13,475 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:13,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86345849] [2021-05-02 14:51:13,475 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:13,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 14:51:13,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:13,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 14:51:13,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:13,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 67 proven. 53 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-05-02 14:51:14,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:14,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931484189] [2021-05-02 14:51:14,170 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:14,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86345849] [2021-05-02 14:51:14,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86345849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:14,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:14,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:51:14,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788669341] [2021-05-02 14:51:14,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:51:14,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:14,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:51:14,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:51:14,171 INFO L87 Difference]: Start difference. First operand 393 states and 486 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 14:51:16,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:16,392 INFO L93 Difference]: Finished difference Result 411 states and 500 transitions. [2021-05-02 14:51:16,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:51:16,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 105 [2021-05-02 14:51:16,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:16,395 INFO L225 Difference]: With dead ends: 411 [2021-05-02 14:51:16,395 INFO L226 Difference]: Without dead ends: 409 [2021-05-02 14:51:16,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:51:16,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-02 14:51:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 402. [2021-05-02 14:51:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 245 states have (on average 1.146938775510204) internal successors, (281), 252 states have internal predecessors, (281), 105 states have call successors, (105), 52 states have call predecessors, (105), 51 states have return successors, (103), 97 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-02 14:51:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 489 transitions. [2021-05-02 14:51:16,437 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 489 transitions. Word has length 105 [2021-05-02 14:51:16,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:16,437 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 489 transitions. [2021-05-02 14:51:16,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 14:51:16,437 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 489 transitions. [2021-05-02 14:51:16,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 14:51:16,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:16,438 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 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] [2021-05-02 14:51:16,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:16,644 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:16,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 19 times [2021-05-02 14:51:16,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:16,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684961518] [2021-05-02 14:51:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:16,650 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:16,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97134584] [2021-05-02 14:51:16,650 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:16,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 14:51:16,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:16,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:16,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-05-02 14:51:17,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:17,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684961518] [2021-05-02 14:51:17,086 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:17,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97134584] [2021-05-02 14:51:17,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97134584] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:17,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:17,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:51:17,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650473465] [2021-05-02 14:51:17,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:51:17,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:17,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:51:17,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:51:17,087 INFO L87 Difference]: Start difference. First operand 402 states and 489 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 14:51:17,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:17,480 INFO L93 Difference]: Finished difference Result 434 states and 528 transitions. [2021-05-02 14:51:17,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:51:17,481 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2021-05-02 14:51:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:17,482 INFO L225 Difference]: With dead ends: 434 [2021-05-02 14:51:17,482 INFO L226 Difference]: Without dead ends: 432 [2021-05-02 14:51:17,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:51:17,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-05-02 14:51:17,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 428. [2021-05-02 14:51:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 262 states have (on average 1.1488549618320612) internal successors, (301), 268 states have internal predecessors, (301), 110 states have call successors, (110), 56 states have call predecessors, (110), 55 states have return successors, (108), 103 states have call predecessors, (108), 108 states have call successors, (108) [2021-05-02 14:51:17,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 519 transitions. [2021-05-02 14:51:17,521 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 519 transitions. Word has length 110 [2021-05-02 14:51:17,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:17,521 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 519 transitions. [2021-05-02 14:51:17,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 14:51:17,521 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 519 transitions. [2021-05-02 14:51:17,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 14:51:17,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:17,522 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 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] [2021-05-02 14:51:17,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:17,737 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:17,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:17,737 INFO L82 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 20 times [2021-05-02 14:51:17,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:17,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821675939] [2021-05-02 14:51:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:17,745 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:17,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443716094] [2021-05-02 14:51:17,745 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:17,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:51:17,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:17,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 14:51:17,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:17,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:17,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 104 proven. 69 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-05-02 14:51:18,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:18,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821675939] [2021-05-02 14:51:18,226 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:18,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443716094] [2021-05-02 14:51:18,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443716094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:18,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:18,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:51:18,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873040686] [2021-05-02 14:51:18,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:51:18,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:18,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:51:18,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:51:18,227 INFO L87 Difference]: Start difference. First operand 428 states and 519 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 14:51:18,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:18,764 INFO L93 Difference]: Finished difference Result 470 states and 571 transitions. [2021-05-02 14:51:18,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:51:18,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2021-05-02 14:51:18,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:18,766 INFO L225 Difference]: With dead ends: 470 [2021-05-02 14:51:18,766 INFO L226 Difference]: Without dead ends: 468 [2021-05-02 14:51:18,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:51:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-02 14:51:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2021-05-02 14:51:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 279 states have (on average 1.146953405017921) internal successors, (320), 284 states have internal predecessors, (320), 115 states have call successors, (115), 60 states have call predecessors, (115), 59 states have return successors, (113), 109 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-02 14:51:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 548 transitions. [2021-05-02 14:51:18,810 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 548 transitions. Word has length 110 [2021-05-02 14:51:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:18,810 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 548 transitions. [2021-05-02 14:51:18,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 14:51:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 548 transitions. [2021-05-02 14:51:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 14:51:18,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:18,811 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:19,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-02 14:51:19,017 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:19,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:19,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 21 times [2021-05-02 14:51:19,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:19,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125865373] [2021-05-02 14:51:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:19,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:19,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402520482] [2021-05-02 14:51:19,022 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true