/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-6253b08 [2021-05-06 02:28:44,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:28:44,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:28:44,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:28:44,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:28:44,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:28:44,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:28:44,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:28:44,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:28:44,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:28:44,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:28:44,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:28:44,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:28:44,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:28:44,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:28:44,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:28:44,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:28:44,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:28:44,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:28:44,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:28:44,146 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 [2021-05-06 02:28:44,186 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:28:44,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:28:44,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:28:44,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:28:44,188 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:28:44,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:28:44,188 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:28:44,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:28:44,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:28:44,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:28:44,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:28:44,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:28:44,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:28:44,189 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:28:44,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:28:44,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:28:44,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:28:44,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:28:44,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:28:44,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:28:44,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:28:44,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:28:44,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:28:44,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:28:44,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:28:44,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:28:44,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:28:44,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:28:44,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:28:44,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:28:44,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:28:44,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:28:44,542 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:28:44,543 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:28:44,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c [2021-05-06 02:28:44,593 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d14dbe3/90e62fb485bf4fd08b419d6061d7cefc/FLAG838833aa2 [2021-05-06 02:28:44,968 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:28:44,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound50.c [2021-05-06 02:28:44,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d14dbe3/90e62fb485bf4fd08b419d6061d7cefc/FLAG838833aa2 [2021-05-06 02:28:45,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d14dbe3/90e62fb485bf4fd08b419d6061d7cefc [2021-05-06 02:28:45,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:28:45,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:28:45,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:28:45,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:28:45,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:28:45,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:28:45" (1/1) ... [2021-05-06 02:28:45,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13aca91b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:45, skipping insertion in model container [2021-05-06 02:28:45,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:28:45" (1/1) ... [2021-05-06 02:28:45,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:28:45,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:28:45,525 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] [2021-05-06 02:28:45,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:28:45,542 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:28:45,550 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] [2021-05-06 02:28:45,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:28:45,601 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:28:45,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:45 WrapperNode [2021-05-06 02:28:45,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:28:45,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:28:45,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:28:45,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:28:45,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:45" (1/1) ... [2021-05-06 02:28:45,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:45" (1/1) ... [2021-05-06 02:28:45,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:45" (1/1) ... [2021-05-06 02:28:45,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:45" (1/1) ... [2021-05-06 02:28:45,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:45" (1/1) ... [2021-05-06 02:28:45,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:45" (1/1) ... [2021-05-06 02:28:45,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:45" (1/1) ... [2021-05-06 02:28:45,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:28:45,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:28:45,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:28:45,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:28:45,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:45" (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 [2021-05-06 02:28:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:28:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:28:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:28:45,790 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:28:45,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:28:45,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:28:45,790 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:28:45,790 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:28:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:28:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:28:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:28:45,791 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:28:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:28:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:28:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:28:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:28:45,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:28:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:28:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:28:45,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:28:46,078 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:28:46,079 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:28:46,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:28:46 BoogieIcfgContainer [2021-05-06 02:28:46,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:28:46,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:28:46,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:28:46,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:28:46,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:28:45" (1/3) ... [2021-05-06 02:28:46,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edbb945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:28:46, skipping insertion in model container [2021-05-06 02:28:46,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:45" (2/3) ... [2021-05-06 02:28:46,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edbb945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:28:46, skipping insertion in model container [2021-05-06 02:28:46,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:28:46" (3/3) ... [2021-05-06 02:28:46,086 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound50.c [2021-05-06 02:28:46,090 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:28:46,093 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:28:46,106 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:28:46,123 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:28:46,123 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:28:46,123 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:28:46,123 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:28:46,123 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:28:46,123 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:28:46,123 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:28:46,123 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:28:46,136 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) [2021-05-06 02:28:46,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:28:46,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:46,141 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] [2021-05-06 02:28:46,141 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:46,146 INFO L82 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2021-05-06 02:28:46,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:46,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282503593] [2021-05-06 02:28:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:46,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:28:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:46,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:28:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:46,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:28:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:46,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:28:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:46,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:28:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:28:46,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:46,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282503593] [2021-05-06 02:28:46,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282503593] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:46,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:46,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:28:46,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398409531] [2021-05-06 02:28:46,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:28:46,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:46,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:28:46,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:28:46,439 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) [2021-05-06 02:28:46,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:46,636 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-05-06 02:28:46,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:28:46,637 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 [2021-05-06 02:28:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:46,642 INFO L225 Difference]: With dead ends: 67 [2021-05-06 02:28:46,642 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 02:28:46,644 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:28:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 02:28:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 02:28:46,687 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) [2021-05-06 02:28:46,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 02:28:46,690 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-06 02:28:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:46,690 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 02:28:46,690 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) [2021-05-06 02:28:46,690 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 02:28:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:28:46,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:46,692 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] [2021-05-06 02:28:46,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:28:46,692 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:46,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:46,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2021-05-06 02:28:46,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:46,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190575612] [2021-05-06 02:28:46,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:46,723 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:46,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674330410] [2021-05-06 02:28:46,724 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 [2021-05-06 02:28:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:46,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:28:46,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:46,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:28:46,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:46,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190575612] [2021-05-06 02:28:46,948 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:46,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674330410] [2021-05-06 02:28:46,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674330410] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:46,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:46,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:46,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232522564] [2021-05-06 02:28:46,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:46,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:46,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:46,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:46,951 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:28:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:47,016 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-05-06 02:28:47,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:47,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-06 02:28:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:47,018 INFO L225 Difference]: With dead ends: 48 [2021-05-06 02:28:47,018 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 02:28:47,019 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 02:28:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-06 02:28:47,029 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) [2021-05-06 02:28:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-06 02:28:47,031 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-06 02:28:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:47,031 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-06 02:28:47,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:28:47,031 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-06 02:28:47,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 02:28:47,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:47,032 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] [2021-05-06 02:28:47,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:28:47,250 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:47,251 INFO L82 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2021-05-06 02:28:47,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:47,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180676435] [2021-05-06 02:28:47,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:47,262 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:47,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257589098] [2021-05-06 02:28:47,262 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 [2021-05-06 02:28:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:47,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:47,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:47,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:28:47,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:47,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180676435] [2021-05-06 02:28:47,551 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:47,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257589098] [2021-05-06 02:28:47,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257589098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:47,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:47,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:47,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821822833] [2021-05-06 02:28:47,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:47,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:47,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:47,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:47,552 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:28:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:47,699 INFO L93 Difference]: Finished difference Result 70 states and 102 transitions. [2021-05-06 02:28:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:47,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 02:28:47,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:47,702 INFO L225 Difference]: With dead ends: 70 [2021-05-06 02:28:47,702 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 02:28:47,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:47,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 02:28:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-06 02:28:47,714 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) [2021-05-06 02:28:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-06 02:28:47,716 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-06 02:28:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:47,716 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-06 02:28:47,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:28:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-06 02:28:47,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 02:28:47,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:47,717 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] [2021-05-06 02:28:47,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:47,935 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:47,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:47,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2021-05-06 02:28:47,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:47,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202575379] [2021-05-06 02:28:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:47,993 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:47,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835742131] [2021-05-06 02:28:47,993 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 [2021-05-06 02:28:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:48,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:48,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:48,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:28:48,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:48,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202575379] [2021-05-06 02:28:48,221 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:48,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835742131] [2021-05-06 02:28:48,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835742131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:48,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:48,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:48,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391419387] [2021-05-06 02:28:48,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:48,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:48,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:48,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:48,222 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) [2021-05-06 02:28:48,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:48,344 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-05-06 02:28:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:48,345 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 [2021-05-06 02:28:48,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:48,346 INFO L225 Difference]: With dead ends: 68 [2021-05-06 02:28:48,346 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 02:28:48,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 02:28:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 02:28:48,356 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) [2021-05-06 02:28:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-06 02:28:48,357 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-06 02:28:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:48,357 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-06 02:28:48,357 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) [2021-05-06 02:28:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-06 02:28:48,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 02:28:48,358 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:48,359 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] [2021-05-06 02:28:48,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:48,576 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:48,579 INFO L82 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2021-05-06 02:28:48,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:48,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535264271] [2021-05-06 02:28:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:48,588 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:48,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401432148] [2021-05-06 02:28:48,589 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 [2021-05-06 02:28:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:48,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:28:48,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:48,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 02:28:48,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:48,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535264271] [2021-05-06 02:28:48,776 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:48,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401432148] [2021-05-06 02:28:48,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401432148] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:48,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:48,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:48,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243976363] [2021-05-06 02:28:48,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:48,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:48,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:48,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:48,778 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) [2021-05-06 02:28:48,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:48,811 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-05-06 02:28:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:48,811 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 [2021-05-06 02:28:48,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:48,812 INFO L225 Difference]: With dead ends: 70 [2021-05-06 02:28:48,812 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 02:28:48,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:48,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 02:28:48,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-06 02:28:48,820 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) [2021-05-06 02:28:48,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-06 02:28:48,821 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-06 02:28:48,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:48,821 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-06 02:28:48,821 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) [2021-05-06 02:28:48,822 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-06 02:28:48,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 02:28:48,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:48,823 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] [2021-05-06 02:28:49,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:49,043 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:49,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1107651435, now seen corresponding path program 1 times [2021-05-06 02:28:49,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:49,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104358531] [2021-05-06 02:28:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:49,052 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:49,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289780432] [2021-05-06 02:28:49,053 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 [2021-05-06 02:28:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:49,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:28:49,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:49,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 02:28:49,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:49,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104358531] [2021-05-06 02:28:49,259 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:49,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289780432] [2021-05-06 02:28:49,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289780432] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:49,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:49,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:49,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49411899] [2021-05-06 02:28:49,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:49,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:49,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:49,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:49,261 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:28:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:49,299 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-05-06 02:28:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:49,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-06 02:28:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:49,301 INFO L225 Difference]: With dead ends: 84 [2021-05-06 02:28:49,301 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 02:28:49,301 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:49,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 02:28:49,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-06 02:28:49,310 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) [2021-05-06 02:28:49,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-06 02:28:49,311 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-06 02:28:49,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:49,311 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-06 02:28:49,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:28:49,311 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-06 02:28:49,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 02:28:49,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:49,312 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] [2021-05-06 02:28:49,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:28:49,531 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:49,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:49,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2021-05-06 02:28:49,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:49,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516143791] [2021-05-06 02:28:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:49,545 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:49,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47414759] [2021-05-06 02:28:49,545 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 [2021-05-06 02:28:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:49,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:28:49,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:49,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 02:28:49,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:49,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516143791] [2021-05-06 02:28:49,732 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:49,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47414759] [2021-05-06 02:28:49,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47414759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:49,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:49,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:49,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100396195] [2021-05-06 02:28:49,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:49,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:49,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:49,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:49,733 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 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) [2021-05-06 02:28:49,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:49,842 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2021-05-06 02:28:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:49,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 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 [2021-05-06 02:28:49,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:49,845 INFO L225 Difference]: With dead ends: 88 [2021-05-06 02:28:49,845 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 02:28:49,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:49,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 02:28:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-06 02:28:49,855 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) [2021-05-06 02:28:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-06 02:28:49,856 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-06 02:28:49,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:49,856 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-06 02:28:49,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 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) [2021-05-06 02:28:49,856 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-06 02:28:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 02:28:49,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:49,857 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] [2021-05-06 02:28:50,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:50,078 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:50,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 1 times [2021-05-06 02:28:50,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:50,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145568011] [2021-05-06 02:28:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:50,086 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:50,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606735440] [2021-05-06 02:28:50,086 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 [2021-05-06 02:28:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:50,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:28:50,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:50,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:28:50,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:50,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145568011] [2021-05-06 02:28:50,264 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:50,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606735440] [2021-05-06 02:28:50,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606735440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:50,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:50,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:28:50,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875829233] [2021-05-06 02:28:50,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:28:50,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:50,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:28:50,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:50,267 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:50,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:50,358 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2021-05-06 02:28:50,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:28:50,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2021-05-06 02:28:50,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:50,363 INFO L225 Difference]: With dead ends: 118 [2021-05-06 02:28:50,363 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 02:28:50,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:50,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 02:28:50,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-06 02:28:50,391 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) [2021-05-06 02:28:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-06 02:28:50,393 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-06 02:28:50,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:50,393 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-06 02:28:50,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:50,393 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-06 02:28:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:28:50,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:50,396 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] [2021-05-06 02:28:50,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:50,609 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:50,610 INFO L82 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2021-05-06 02:28:50,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:50,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015355897] [2021-05-06 02:28:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:50,618 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:50,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633105756] [2021-05-06 02:28:50,619 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 [2021-05-06 02:28:50,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:50,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:50,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 02:28:50,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:50,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-06 02:28:50,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:50,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015355897] [2021-05-06 02:28:50,909 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:50,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633105756] [2021-05-06 02:28:50,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633105756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:50,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:50,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:50,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110297708] [2021-05-06 02:28:50,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:50,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:50,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:50,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:50,911 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:28:51,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:51,152 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2021-05-06 02:28:51,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:51,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 02:28:51,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:51,153 INFO L225 Difference]: With dead ends: 137 [2021-05-06 02:28:51,153 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 02:28:51,154 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:51,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 02:28:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-06 02:28:51,164 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) [2021-05-06 02:28:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-06 02:28:51,181 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-06 02:28:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:51,182 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-06 02:28:51,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:28:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-06 02:28:51,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:28:51,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:51,183 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] [2021-05-06 02:28:51,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:28:51,402 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:51,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2021-05-06 02:28:51,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:51,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311585431] [2021-05-06 02:28:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:51,418 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:51,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899421963] [2021-05-06 02:28:51,419 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 [2021-05-06 02:28:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:51,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:51,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:51,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 02:28:51,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:51,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311585431] [2021-05-06 02:28:51,624 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:51,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899421963] [2021-05-06 02:28:51,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899421963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:51,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:51,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:28:51,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169999821] [2021-05-06 02:28:51,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:28:51,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:51,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:28:51,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:51,625 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:28:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:51,774 INFO L93 Difference]: Finished difference Result 151 states and 193 transitions. [2021-05-06 02:28:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:28:51,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2021-05-06 02:28:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:51,775 INFO L225 Difference]: With dead ends: 151 [2021-05-06 02:28:51,775 INFO L226 Difference]: Without dead ends: 149 [2021-05-06 02:28:51,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:51,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-06 02:28:51,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-06 02:28:51,787 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) [2021-05-06 02:28:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2021-05-06 02:28:51,788 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 69 [2021-05-06 02:28:51,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:51,788 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2021-05-06 02:28:51,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:28:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2021-05-06 02:28:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:28:51,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:51,806 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] [2021-05-06 02:28:52,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:52,023 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:52,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:52,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1872855628, now seen corresponding path program 2 times [2021-05-06 02:28:52,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:52,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205711219] [2021-05-06 02:28:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:52,030 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:52,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068523122] [2021-05-06 02:28:52,030 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 [2021-05-06 02:28:52,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:52,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:52,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:52,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:52,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 02:28:52,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:52,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205711219] [2021-05-06 02:28:52,227 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:52,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068523122] [2021-05-06 02:28:52,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068523122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:52,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:52,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:28:52,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606898805] [2021-05-06 02:28:52,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:28:52,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:52,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:28:52,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:52,228 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:28:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:52,307 INFO L93 Difference]: Finished difference Result 166 states and 212 transitions. [2021-05-06 02:28:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:28:52,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2021-05-06 02:28:52,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:52,308 INFO L225 Difference]: With dead ends: 166 [2021-05-06 02:28:52,308 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 02:28:52,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 02:28:52,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-06 02:28:52,320 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) [2021-05-06 02:28:52,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-06 02:28:52,321 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 69 [2021-05-06 02:28:52,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:52,322 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-06 02:28:52,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:28:52,322 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-06 02:28:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 02:28:52,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:52,323 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] [2021-05-06 02:28:52,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:52,545 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:52,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:52,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 2 times [2021-05-06 02:28:52,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:52,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589975119] [2021-05-06 02:28:52,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:52,552 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:52,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120456295] [2021-05-06 02:28:52,553 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 [2021-05-06 02:28:52,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:52,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:52,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 02:28:52,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:52,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:53,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:53,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:53,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:53,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:53,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-06 02:28:53,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:53,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589975119] [2021-05-06 02:28:53,066 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:53,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120456295] [2021-05-06 02:28:53,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120456295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:53,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:53,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:28:53,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535209875] [2021-05-06 02:28:53,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:28:53,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:53,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:28:53,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:53,068 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:28:53,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:53,786 INFO L93 Difference]: Finished difference Result 190 states and 241 transitions. [2021-05-06 02:28:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:28:53,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-06 02:28:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:53,787 INFO L225 Difference]: With dead ends: 190 [2021-05-06 02:28:53,787 INFO L226 Difference]: Without dead ends: 188 [2021-05-06 02:28:53,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:28:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-06 02:28:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-05-06 02:28:53,802 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) [2021-05-06 02:28:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 02:28:53,803 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 74 [2021-05-06 02:28:53,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:53,803 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 02:28:53,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:28:53,803 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 02:28:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 02:28:53,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:53,804 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] [2021-05-06 02:28:54,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:28:54,023 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:54,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2021-05-06 02:28:54,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:54,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794258751] [2021-05-06 02:28:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:54,030 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:54,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305826604] [2021-05-06 02:28:54,030 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 [2021-05-06 02:28:54,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:28:54,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:54,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:28:54,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:54,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-05-06 02:28:54,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:54,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794258751] [2021-05-06 02:28:54,430 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:54,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305826604] [2021-05-06 02:28:54,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305826604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:54,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:54,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:28:54,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626157558] [2021-05-06 02:28:54,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:28:54,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:54,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:28:54,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:54,432 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2021-05-06 02:28:54,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:54,927 INFO L93 Difference]: Finished difference Result 213 states and 266 transitions. [2021-05-06 02:28:54,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:28:54,927 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 [2021-05-06 02:28:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:54,928 INFO L225 Difference]: With dead ends: 213 [2021-05-06 02:28:54,928 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 02:28:54,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:54,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 02:28:54,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-05-06 02:28:54,944 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) [2021-05-06 02:28:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-05-06 02:28:54,945 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 74 [2021-05-06 02:28:54,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:54,945 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-05-06 02:28:54,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2021-05-06 02:28:54,945 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-05-06 02:28:54,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 02:28:54,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:54,946 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] [2021-05-06 02:28:55,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:28:55,168 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:55,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:55,169 INFO L82 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 4 times [2021-05-06 02:28:55,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:55,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845911364] [2021-05-06 02:28:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:55,184 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:55,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999944517] [2021-05-06 02:28:55,185 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 [2021-05-06 02:28:55,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:28:55,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:55,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 02:28:55,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:55,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 35 proven. 31 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-06 02:28:55,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:55,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845911364] [2021-05-06 02:28:55,479 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:55,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999944517] [2021-05-06 02:28:55,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999944517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:55,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:55,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:28:55,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96468138] [2021-05-06 02:28:55,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:28:55,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:55,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:28:55,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:55,480 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:28:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:55,933 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2021-05-06 02:28:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:28:55,935 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 79 [2021-05-06 02:28:55,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:55,936 INFO L225 Difference]: With dead ends: 219 [2021-05-06 02:28:55,936 INFO L226 Difference]: Without dead ends: 212 [2021-05-06 02:28:55,936 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:55,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-06 02:28:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-06 02:28:55,952 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) [2021-05-06 02:28:55,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-05-06 02:28:55,953 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 79 [2021-05-06 02:28:55,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:55,953 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-05-06 02:28:55,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:28:55,953 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-05-06 02:28:55,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 02:28:55,954 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:55,954 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] [2021-05-06 02:28:56,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:28:56,171 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:56,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:56,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2021-05-06 02:28:56,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:56,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158589573] [2021-05-06 02:28:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:56,177 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:56,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298401862] [2021-05-06 02:28:56,177 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 [2021-05-06 02:28:56,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:28:56,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:56,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 02:28:56,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:56,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-05-06 02:28:56,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:56,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158589573] [2021-05-06 02:28:56,473 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:56,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298401862] [2021-05-06 02:28:56,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298401862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:56,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:56,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:28:56,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880508906] [2021-05-06 02:28:56,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:28:56,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:56,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:28:56,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:56,475 INFO L87 Difference]: Start difference. First operand 175 states and 211 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:29:03,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:03,212 INFO L93 Difference]: Finished difference Result 200 states and 251 transitions. [2021-05-06 02:29:03,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:29:03,213 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 79 [2021-05-06 02:29:03,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:03,214 INFO L225 Difference]: With dead ends: 200 [2021-05-06 02:29:03,214 INFO L226 Difference]: Without dead ends: 194 [2021-05-06 02:29:03,214 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:29:03,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-06 02:29:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-05-06 02:29:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 112 states have (on average 1.1607142857142858) internal successors, (130), 116 states have internal predecessors, (130), 54 states have call successors, (54), 25 states have call predecessors, (54), 24 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 02:29:03,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 235 transitions. [2021-05-06 02:29:03,230 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 235 transitions. Word has length 79 [2021-05-06 02:29:03,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:03,230 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 235 transitions. [2021-05-06 02:29:03,230 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:29:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 235 transitions. [2021-05-06 02:29:03,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:29:03,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:03,231 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] [2021-05-06 02:29:03,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:03,450 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:03,450 INFO L82 PathProgramCache]: Analyzing trace with hash -105752765, now seen corresponding path program 5 times [2021-05-06 02:29:03,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:03,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296038560] [2021-05-06 02:29:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:03,455 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:03,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616995047] [2021-05-06 02:29:03,455 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 [2021-05-06 02:29:03,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 02:29:03,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:03,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:29:03,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:03,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-05-06 02:29:03,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:03,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296038560] [2021-05-06 02:29:03,692 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:03,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616995047] [2021-05-06 02:29:03,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616995047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:03,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:03,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:29:03,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891854564] [2021-05-06 02:29:03,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:29:03,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:03,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:29:03,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:29:03,693 INFO L87 Difference]: Start difference. First operand 191 states and 235 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:29:03,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:03,762 INFO L93 Difference]: Finished difference Result 223 states and 282 transitions. [2021-05-06 02:29:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:29:03,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2021-05-06 02:29:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:03,765 INFO L225 Difference]: With dead ends: 223 [2021-05-06 02:29:03,765 INFO L226 Difference]: Without dead ends: 221 [2021-05-06 02:29:03,765 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:29:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-06 02:29:03,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 208. [2021-05-06 02:29:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 124 states have internal predecessors, (139), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 02:29:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 262 transitions. [2021-05-06 02:29:03,786 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 262 transitions. Word has length 87 [2021-05-06 02:29:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:03,786 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 262 transitions. [2021-05-06 02:29:03,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:29:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 262 transitions. [2021-05-06 02:29:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:29:03,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:03,787 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] [2021-05-06 02:29:04,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:29:04,005 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:04,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:04,006 INFO L82 PathProgramCache]: Analyzing trace with hash -297024573, now seen corresponding path program 6 times [2021-05-06 02:29:04,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:04,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912961406] [2021-05-06 02:29:04,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:04,016 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:04,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202387589] [2021-05-06 02:29:04,017 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 [2021-05-06 02:29:04,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 02:29:04,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:04,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:29:04,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:04,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 02:29:04,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:04,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912961406] [2021-05-06 02:29:04,220 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:04,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202387589] [2021-05-06 02:29:04,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202387589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:04,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:04,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:29:04,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660261899] [2021-05-06 02:29:04,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:29:04,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:04,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:29:04,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:29:04,221 INFO L87 Difference]: Start difference. First operand 208 states and 262 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:29:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:04,341 INFO L93 Difference]: Finished difference Result 233 states and 296 transitions. [2021-05-06 02:29:04,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:29:04,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 02:29:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:04,342 INFO L225 Difference]: With dead ends: 233 [2021-05-06 02:29:04,343 INFO L226 Difference]: Without dead ends: 228 [2021-05-06 02:29:04,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:29:04,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-06 02:29:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-05-06 02:29:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 135 states have internal predecessors, (151), 69 states have call successors, (69), 28 states have call predecessors, (69), 27 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-06 02:29:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 286 transitions. [2021-05-06 02:29:04,385 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 286 transitions. Word has length 87 [2021-05-06 02:29:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:04,387 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 286 transitions. [2021-05-06 02:29:04,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:29:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 286 transitions. [2021-05-06 02:29:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:29:04,388 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:04,388 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] [2021-05-06 02:29:04,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:29:04,605 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:04,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:04,605 INFO L82 PathProgramCache]: Analyzing trace with hash -239766271, now seen corresponding path program 7 times [2021-05-06 02:29:04,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:04,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293783582] [2021-05-06 02:29:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:04,617 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:04,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649963039] [2021-05-06 02:29:04,617 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 [2021-05-06 02:29:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:04,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:29:04,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:04,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 02:29:04,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:04,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293783582] [2021-05-06 02:29:04,872 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:04,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649963039] [2021-05-06 02:29:04,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649963039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:04,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:04,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:29:04,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743966620] [2021-05-06 02:29:04,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:29:04,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:04,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:29:04,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:29:04,875 INFO L87 Difference]: Start difference. First operand 227 states and 286 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:29:05,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:05,217 INFO L93 Difference]: Finished difference Result 243 states and 309 transitions. [2021-05-06 02:29:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:29:05,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 02:29:05,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:05,222 INFO L225 Difference]: With dead ends: 243 [2021-05-06 02:29:05,222 INFO L226 Difference]: Without dead ends: 241 [2021-05-06 02:29:05,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:29:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-06 02:29:05,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2021-05-06 02:29:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 135 states have (on average 1.162962962962963) internal successors, (157), 141 states have internal predecessors, (157), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 02:29:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-05-06 02:29:05,246 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 87 [2021-05-06 02:29:05,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:05,246 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-05-06 02:29:05,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:29:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-05-06 02:29:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:29:05,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:05,247 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] [2021-05-06 02:29:05,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:29:05,466 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:05,467 INFO L82 PathProgramCache]: Analyzing trace with hash 85135427, now seen corresponding path program 8 times [2021-05-06 02:29:05,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:05,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485011198] [2021-05-06 02:29:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:05,479 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:05,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309581643] [2021-05-06 02:29:05,479 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 [2021-05-06 02:29:05,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:29:05,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:05,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:29:05,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:05,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 02:29:05,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:05,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485011198] [2021-05-06 02:29:05,674 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:05,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309581643] [2021-05-06 02:29:05,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309581643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:05,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:05,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:29:05,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473972678] [2021-05-06 02:29:05,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:29:05,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:05,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:29:05,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:29:05,675 INFO L87 Difference]: Start difference. First operand 239 states and 304 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:29:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:05,866 INFO L93 Difference]: Finished difference Result 254 states and 325 transitions. [2021-05-06 02:29:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:29:05,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 02:29:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:05,868 INFO L225 Difference]: With dead ends: 254 [2021-05-06 02:29:05,868 INFO L226 Difference]: Without dead ends: 249 [2021-05-06 02:29:05,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:29:05,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-06 02:29:05,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 239. [2021-05-06 02:29:05,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 135 states have (on average 1.162962962962963) internal successors, (157), 141 states have internal predecessors, (157), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 02:29:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-05-06 02:29:05,891 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 87 [2021-05-06 02:29:05,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:05,891 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-05-06 02:29:05,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:29:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-05-06 02:29:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:29:05,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:05,892 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] [2021-05-06 02:29:06,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:06,109 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:06,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:06,109 INFO L82 PathProgramCache]: Analyzing trace with hash 142393729, now seen corresponding path program 9 times [2021-05-06 02:29:06,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:06,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482586598] [2021-05-06 02:29:06,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:06,118 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:06,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44608717] [2021-05-06 02:29:06,118 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 [2021-05-06 02:29:06,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:29:06,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:06,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:29:06,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:06,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 49 proven. 7 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-05-06 02:29:06,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:06,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482586598] [2021-05-06 02:29:06,344 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:06,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44608717] [2021-05-06 02:29:06,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44608717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:06,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:06,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:29:06,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445877995] [2021-05-06 02:29:06,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:29:06,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:06,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:29:06,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:29:06,345 INFO L87 Difference]: Start difference. First operand 239 states and 304 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 02:29:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:06,424 INFO L93 Difference]: Finished difference Result 245 states and 309 transitions. [2021-05-06 02:29:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:29:06,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 87 [2021-05-06 02:29:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:06,426 INFO L225 Difference]: With dead ends: 245 [2021-05-06 02:29:06,426 INFO L226 Difference]: Without dead ends: 240 [2021-05-06 02:29:06,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:29:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-06 02:29:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2021-05-06 02:29:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 137 states have (on average 1.145985401459854) internal successors, (157), 143 states have internal predecessors, (157), 70 states have call successors, (70), 30 states have call predecessors, (70), 29 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-06 02:29:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 295 transitions. [2021-05-06 02:29:06,447 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 295 transitions. Word has length 87 [2021-05-06 02:29:06,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:06,447 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 295 transitions. [2021-05-06 02:29:06,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 02:29:06,447 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 295 transitions. [2021-05-06 02:29:06,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:29:06,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:06,448 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] [2021-05-06 02:29:06,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:06,667 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:06,667 INFO L82 PathProgramCache]: Analyzing trace with hash 418671986, now seen corresponding path program 3 times [2021-05-06 02:29:06,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:06,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60082514] [2021-05-06 02:29:06,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:06,675 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:06,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952971108] [2021-05-06 02:29:06,676 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 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 [2021-05-06 02:29:06,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:29:06,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:06,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:29:06,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:06,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 69 proven. 14 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 02:29:06,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:06,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60082514] [2021-05-06 02:29:06,928 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:06,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952971108] [2021-05-06 02:29:06,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952971108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:06,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:06,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:29:06,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436872110] [2021-05-06 02:29:06,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:29:06,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:06,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:29:06,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:29:06,930 INFO L87 Difference]: Start difference. First operand 237 states and 295 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:29:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:07,154 INFO L93 Difference]: Finished difference Result 271 states and 338 transitions. [2021-05-06 02:29:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:29:07,155 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 92 [2021-05-06 02:29:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:07,156 INFO L225 Difference]: With dead ends: 271 [2021-05-06 02:29:07,156 INFO L226 Difference]: Without dead ends: 269 [2021-05-06 02:29:07,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:29:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-06 02:29:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 228. [2021-05-06 02:29:07,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 136 states have (on average 1.1397058823529411) internal successors, (155), 141 states have internal predecessors, (155), 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) [2021-05-06 02:29:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 275 transitions. [2021-05-06 02:29:07,175 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 275 transitions. Word has length 92 [2021-05-06 02:29:07,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:07,176 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 275 transitions. [2021-05-06 02:29:07,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:29:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 275 transitions. [2021-05-06 02:29:07,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:29:07,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:07,177 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] [2021-05-06 02:29:07,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 02:29:07,402 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:07,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 10 times [2021-05-06 02:29:07,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:07,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547021276] [2021-05-06 02:29:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:07,416 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:07,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431184614] [2021-05-06 02:29:07,417 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 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 [2021-05-06 02:29:07,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:29:07,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:07,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 02:29:07,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:07,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:07,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:07,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:07,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:07,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:07,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:07,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:07,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 56 proven. 54 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-06 02:29:07,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:07,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547021276] [2021-05-06 02:29:07,737 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:07,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431184614] [2021-05-06 02:29:07,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431184614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:07,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:07,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:29:07,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111585697] [2021-05-06 02:29:07,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:29:07,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:07,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:29:07,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:29:07,738 INFO L87 Difference]: Start difference. First operand 228 states and 275 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) 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) [2021-05-06 02:29:08,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:08,188 INFO L93 Difference]: Finished difference Result 258 states and 314 transitions. [2021-05-06 02:29:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:29:08,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) 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 [2021-05-06 02:29:08,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:08,190 INFO L225 Difference]: With dead ends: 258 [2021-05-06 02:29:08,190 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 02:29:08,190 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:29:08,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 02:29:08,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 242. [2021-05-06 02:29:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 150 states have internal predecessors, (165), 64 states have call successors, (64), 33 states have call predecessors, (64), 32 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:29:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 291 transitions. [2021-05-06 02:29:08,210 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 291 transitions. Word has length 92 [2021-05-06 02:29:08,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:08,210 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 291 transitions. [2021-05-06 02:29:08,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) 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) [2021-05-06 02:29:08,210 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 291 transitions. [2021-05-06 02:29:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:29:08,211 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:08,211 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] [2021-05-06 02:29:08,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 02:29:08,428 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 11 times [2021-05-06 02:29:08,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:08,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370915523] [2021-05-06 02:29:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:08,445 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:08,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583399446] [2021-05-06 02:29:08,445 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 [2021-05-06 02:29:09,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 02:29:09,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:09,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:29:09,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:09,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-06 02:29:09,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:09,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370915523] [2021-05-06 02:29:09,242 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:09,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583399446] [2021-05-06 02:29:09,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583399446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:09,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:09,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:29:09,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140296063] [2021-05-06 02:29:09,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:29:09,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:09,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:29:09,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:29:09,243 INFO L87 Difference]: Start difference. First operand 242 states and 291 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:29:09,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:09,506 INFO L93 Difference]: Finished difference Result 270 states and 327 transitions. [2021-05-06 02:29:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:29:09,506 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 92 [2021-05-06 02:29:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:09,508 INFO L225 Difference]: With dead ends: 270 [2021-05-06 02:29:09,508 INFO L226 Difference]: Without dead ends: 268 [2021-05-06 02:29:09,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:29:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-06 02:29:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 244. [2021-05-06 02:29:09,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 151 states have internal predecessors, (167), 63 states have call successors, (63), 34 states have call predecessors, (63), 33 states have return successors, (61), 58 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 02:29:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 291 transitions. [2021-05-06 02:29:09,533 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 291 transitions. Word has length 92 [2021-05-06 02:29:09,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:09,533 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 291 transitions. [2021-05-06 02:29:09,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:29:09,533 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 291 transitions. [2021-05-06 02:29:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:29:09,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:09,535 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] [2021-05-06 02:29:09,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:09,744 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:09,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:09,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 12 times [2021-05-06 02:29:09,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:09,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122838384] [2021-05-06 02:29:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:09,756 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:09,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108326624] [2021-05-06 02:29:09,756 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 [2021-05-06 02:29:10,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 02:29:10,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:10,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:29:10,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:10,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 87 proven. 12 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-05-06 02:29:10,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:10,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122838384] [2021-05-06 02:29:10,551 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:10,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108326624] [2021-05-06 02:29:10,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108326624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:10,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:10,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:29:10,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640187537] [2021-05-06 02:29:10,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:29:10,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:10,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:29:10,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:29:10,553 INFO L87 Difference]: Start difference. First operand 244 states and 291 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:29:11,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:11,499 INFO L93 Difference]: Finished difference Result 317 states and 395 transitions. [2021-05-06 02:29:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:29:11,500 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2021-05-06 02:29:11,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:11,501 INFO L225 Difference]: With dead ends: 317 [2021-05-06 02:29:11,501 INFO L226 Difference]: Without dead ends: 311 [2021-05-06 02:29:11,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:29:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-06 02:29:11,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 254. [2021-05-06 02:29:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 153 states have (on average 1.1241830065359477) internal successors, (172), 158 states have internal predecessors, (172), 65 states have call successors, (65), 36 states have call predecessors, (65), 35 states have return successors, (63), 59 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 02:29:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 300 transitions. [2021-05-06 02:29:11,540 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 300 transitions. Word has length 92 [2021-05-06 02:29:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:11,540 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 300 transitions. [2021-05-06 02:29:11,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:29:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 300 transitions. [2021-05-06 02:29:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 02:29:11,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:11,541 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] [2021-05-06 02:29:11,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:29:11,747 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:11,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:11,748 INFO L82 PathProgramCache]: Analyzing trace with hash -87157341, now seen corresponding path program 13 times [2021-05-06 02:29:11,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:11,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396698984] [2021-05-06 02:29:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:11,753 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:11,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580316180] [2021-05-06 02:29:11,753 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 [2021-05-06 02:29:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:11,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-06 02:29:11,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:12,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 59 proven. 47 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 02:29:12,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:12,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396698984] [2021-05-06 02:29:12,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:12,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580316180] [2021-05-06 02:29:12,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580316180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:12,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:12,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:29:12,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938769874] [2021-05-06 02:29:12,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:29:12,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:12,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:29:12,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:29:12,074 INFO L87 Difference]: Start difference. First operand 254 states and 300 transitions. Second operand has 11 states, 10 states have (on average 2.7) 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), 5 states have call successors, (16) [2021-05-06 02:29:12,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:12,450 INFO L93 Difference]: Finished difference Result 306 states and 366 transitions. [2021-05-06 02:29:12,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:29:12,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) 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), 5 states have call successors, (16) Word has length 97 [2021-05-06 02:29:12,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:12,452 INFO L225 Difference]: With dead ends: 306 [2021-05-06 02:29:12,452 INFO L226 Difference]: Without dead ends: 296 [2021-05-06 02:29:12,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:29:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-06 02:29:12,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-05-06 02:29:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 180 states have (on average 1.1222222222222222) internal successors, (202), 185 states have internal predecessors, (202), 74 states have call successors, (74), 42 states have call predecessors, (74), 41 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 02:29:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 348 transitions. [2021-05-06 02:29:12,484 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 348 transitions. Word has length 97 [2021-05-06 02:29:12,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:12,484 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 348 transitions. [2021-05-06 02:29:12,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) 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), 5 states have call successors, (16) [2021-05-06 02:29:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 348 transitions. [2021-05-06 02:29:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 02:29:12,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:12,485 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] [2021-05-06 02:29:12,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:12,703 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:12,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:12,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 14 times [2021-05-06 02:29:12,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:12,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014491013] [2021-05-06 02:29:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:12,710 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:12,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490698613] [2021-05-06 02:29:12,711 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 [2021-05-06 02:29:12,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:29:12,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:12,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 02:29:12,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:12,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:12,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:12,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:12,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:12,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:12,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:12,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:12,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:12,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:12,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:12,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:12,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:13,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:14,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:14,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:14,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:14,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:30,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:30,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:30,873 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1624 DAG size of output: 1491 [2021-05-06 02:30:31,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:31,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:31,613 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 2117 DAG size of output: 2062 [2021-05-06 02:30:32,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:32,270 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1763 DAG size of output: 1548