/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/hard-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:09:08,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:09:08,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:09:09,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:09:09,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:09:09,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:09:09,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:09:09,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:09:09,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:09:09,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:09:09,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:09:09,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:09:09,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:09:09,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:09:09,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:09:09,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:09:09,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:09:09,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:09:09,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:09:09,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:09:09,030 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 03:09:09,044 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:09:09,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:09:09,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:09:09,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:09:09,045 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:09:09,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:09:09,046 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:09:09,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:09:09,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:09:09,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:09:09,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:09:09,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:09:09,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:09:09,046 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:09:09,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:09:09,047 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:09:09,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:09:09,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:09:09,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:09:09,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:09:09,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:09:09,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:09:09,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:09:09,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:09:09,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:09:09,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:09:09,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:09:09,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:09:09,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:09:09,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:09:09,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:09:09,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:09:09,311 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:09:09,312 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:09:09,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c [2021-05-06 03:09:09,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2a410eff/11bf973b600d4ec69f77a2338db9417b/FLAG8c0864610 [2021-05-06 03:09:09,942 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:09:09,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c [2021-05-06 03:09:09,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2a410eff/11bf973b600d4ec69f77a2338db9417b/FLAG8c0864610 [2021-05-06 03:09:10,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2a410eff/11bf973b600d4ec69f77a2338db9417b [2021-05-06 03:09:10,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:09:10,153 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:09:10,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:09:10,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:09:10,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:09:10,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:09:10" (1/1) ... [2021-05-06 03:09:10,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347b8730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:10, skipping insertion in model container [2021-05-06 03:09:10,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:09:10" (1/1) ... [2021-05-06 03:09:10,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:09:10,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:09:10,297 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/hard-ll_unwindbound5.c[546,559] [2021-05-06 03:09:10,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:09:10,316 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:09:10,371 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/hard-ll_unwindbound5.c[546,559] [2021-05-06 03:09:10,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:09:10,397 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:09:10,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:10 WrapperNode [2021-05-06 03:09:10,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:09:10,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:09:10,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:09:10,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:09:10,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:10" (1/1) ... [2021-05-06 03:09:10,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:10" (1/1) ... [2021-05-06 03:09:10,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:10" (1/1) ... [2021-05-06 03:09:10,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:10" (1/1) ... [2021-05-06 03:09:10,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:10" (1/1) ... [2021-05-06 03:09:10,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:10" (1/1) ... [2021-05-06 03:09:10,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:10" (1/1) ... [2021-05-06 03:09:10,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:09:10,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:09:10,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:09:10,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:09:10,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:10" (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 03:09:10,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:09:10,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:09:10,502 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:09:10,502 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:09:10,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:09:10,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:09:10,502 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:09:10,503 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:09:10,503 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:09:10,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:09:10,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:09:10,503 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:09:10,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:09:10,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:09:10,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:09:10,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:09:10,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:09:10,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:09:10,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:09:10,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:09:10,661 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:09:10,661 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:09:10,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:09:10 BoogieIcfgContainer [2021-05-06 03:09:10,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:09:10,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:09:10,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:09:10,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:09:10,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:09:10" (1/3) ... [2021-05-06 03:09:10,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2967e2b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:09:10, skipping insertion in model container [2021-05-06 03:09:10,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:10" (2/3) ... [2021-05-06 03:09:10,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2967e2b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:09:10, skipping insertion in model container [2021-05-06 03:09:10,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:09:10" (3/3) ... [2021-05-06 03:09:10,667 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound5.c [2021-05-06 03:09:10,671 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:09:10,673 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:09:10,682 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:09:10,696 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:09:10,696 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:09:10,696 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:09:10,696 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:09:10,696 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:09:10,696 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:09:10,696 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:09:10,696 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:09:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:09:10,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 03:09:10,709 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:10,709 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:10,709 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:10,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:10,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-06 03:09:10,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:10,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325891505] [2021-05-06 03:09:10,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:10,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:09:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:10,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:09:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:09:10,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:10,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325891505] [2021-05-06 03:09:10,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325891505] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:10,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:10,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:09:10,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890064298] [2021-05-06 03:09:10,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:09:10,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:10,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:09:10,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:09:10,882 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:09:10,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:10,987 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-06 03:09:10,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:09:10,988 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 03:09:10,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:10,993 INFO L225 Difference]: With dead ends: 66 [2021-05-06 03:09:10,993 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:09:10,995 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:09:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:09:11,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 03:09:11,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:09:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 03:09:11,017 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 03:09:11,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:11,017 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 03:09:11,017 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:09:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 03:09:11,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 03:09:11,018 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:11,018 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:11,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:09:11,018 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:11,019 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-06 03:09:11,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:11,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344047218] [2021-05-06 03:09:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:11,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:09:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:11,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:09:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:09:11,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:11,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344047218] [2021-05-06 03:09:11,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344047218] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:11,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:11,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:09:11,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2570407] [2021-05-06 03:09:11,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:09:11,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:11,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:09:11,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:11,112 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:09:11,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:11,289 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-06 03:09:11,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:09:11,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 03:09:11,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:11,290 INFO L225 Difference]: With dead ends: 47 [2021-05-06 03:09:11,290 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 03:09:11,291 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:11,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 03:09:11,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 03:09:11,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:09:11,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 03:09:11,298 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 03:09:11,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:11,299 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 03:09:11,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:09:11,299 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 03:09:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 03:09:11,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:11,299 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:11,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:09:11,299 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:11,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:11,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-06 03:09:11,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:11,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88570860] [2021-05-06 03:09:11,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:11,311 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:11,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71497529] [2021-05-06 03:09:11,311 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 03:09:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:11,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 03:09:11,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:11,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:11,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:11,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:11,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:11,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:09:11,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:11,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88570860] [2021-05-06 03:09:11,429 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:11,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71497529] [2021-05-06 03:09:11,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71497529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:11,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:11,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 03:09:11,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123858076] [2021-05-06 03:09:11,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 03:09:11,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:11,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 03:09:11,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:09:11,431 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:09:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:11,440 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-05-06 03:09:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 03:09:11,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 03:09:11,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:11,441 INFO L225 Difference]: With dead ends: 52 [2021-05-06 03:09:11,441 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 03:09:11,441 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:09:11,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 03:09:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 03:09:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:09:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 03:09:11,446 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 03:09:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:11,446 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 03:09:11,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:09:11,446 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 03:09:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 03:09:11,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:11,447 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:11,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 03:09:11,666 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:11,666 INFO L82 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2021-05-06 03:09:11,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:11,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355117349] [2021-05-06 03:09:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:11,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:09:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:11,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:09:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:11,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 03:09:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:09:11,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:11,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355117349] [2021-05-06 03:09:11,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355117349] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:11,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:11,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:09:11,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952249568] [2021-05-06 03:09:11,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:09:11,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:11,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:09:11,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:11,737 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:09:11,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:11,915 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-06 03:09:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:09:11,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 03:09:11,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:11,916 INFO L225 Difference]: With dead ends: 52 [2021-05-06 03:09:11,916 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 03:09:11,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:11,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 03:09:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 03:09:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:09:11,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 03:09:11,922 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 03:09:11,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:11,922 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 03:09:11,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:09:11,922 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 03:09:11,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:09:11,922 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:11,922 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:11,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 03:09:11,923 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:11,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:11,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2021-05-06 03:09:11,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:11,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60437219] [2021-05-06 03:09:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:11,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:11,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407714719] [2021-05-06 03:09:11,932 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 03:09:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:11,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:09:11,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:12,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 03:09:12,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:12,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60437219] [2021-05-06 03:09:12,030 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:12,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407714719] [2021-05-06 03:09:12,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407714719] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:12,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:12,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:09:12,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878589641] [2021-05-06 03:09:12,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:09:12,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:12,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:09:12,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:09:12,042 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:09:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:12,080 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2021-05-06 03:09:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:09:12,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:09:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:12,082 INFO L225 Difference]: With dead ends: 71 [2021-05-06 03:09:12,082 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 03:09:12,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:12,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 03:09:12,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 03:09:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:09:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-06 03:09:12,088 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2021-05-06 03:09:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:12,088 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-06 03:09:12,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:09:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-06 03:09:12,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:09:12,089 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:12,089 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:12,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:12,305 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:12,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:12,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2021-05-06 03:09:12,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:12,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900447861] [2021-05-06 03:09:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:12,313 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:12,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113996856] [2021-05-06 03:09:12,314 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 03:09:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:12,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:09:12,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:12,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:09:12,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:12,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900447861] [2021-05-06 03:09:12,423 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:12,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113996856] [2021-05-06 03:09:12,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113996856] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:12,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:12,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:09:12,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277111152] [2021-05-06 03:09:12,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:09:12,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:12,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:09:12,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:09:12,424 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:09:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:12,454 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-05-06 03:09:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:09:12,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 03:09:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:12,455 INFO L225 Difference]: With dead ends: 76 [2021-05-06 03:09:12,455 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 03:09:12,456 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:09:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 03:09:12,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 03:09:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:09:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-06 03:09:12,461 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-06 03:09:12,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:12,461 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-06 03:09:12,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:09:12,461 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-06 03:09:12,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:09:12,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:12,462 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:12,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:12,678 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:12,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:12,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2021-05-06 03:09:12,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:12,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477177867] [2021-05-06 03:09:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:12,686 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:12,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903755417] [2021-05-06 03:09:12,686 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 03:09:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:12,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:09:12,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:12,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:09:12,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:12,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477177867] [2021-05-06 03:09:12,826 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:12,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903755417] [2021-05-06 03:09:12,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903755417] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:12,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:12,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:09:12,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120834521] [2021-05-06 03:09:12,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:09:12,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:12,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:09:12,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:12,828 INFO L87 Difference]: Start difference. First operand 68 states and 78 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:09:12,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:12,881 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-05-06 03:09:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:09:12,881 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 03:09:12,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:12,882 INFO L225 Difference]: With dead ends: 74 [2021-05-06 03:09:12,882 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 03:09:12,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:12,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 03:09:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 03:09:12,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 03:09:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 03:09:12,888 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-06 03:09:12,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:12,888 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 03:09:12,888 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:09:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 03:09:12,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:09:12,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:12,889 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:13,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:13,103 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:13,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2021-05-06 03:09:13,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:13,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889880543] [2021-05-06 03:09:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:13,110 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:13,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702903709] [2021-05-06 03:09:13,111 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 03:09:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:13,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:09:13,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:13,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:09:13,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:13,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889880543] [2021-05-06 03:09:13,294 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:13,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702903709] [2021-05-06 03:09:13,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702903709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:13,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:13,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 03:09:13,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625320571] [2021-05-06 03:09:13,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:09:13,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:13,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:09:13,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:09:13,295 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:09:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:13,319 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-05-06 03:09:13,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:09:13,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 03:09:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:13,320 INFO L225 Difference]: With dead ends: 74 [2021-05-06 03:09:13,320 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 03:09:13,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 03:09:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 03:09:13,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 03:09:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-06 03:09:13,326 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-06 03:09:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:13,326 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-06 03:09:13,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:09:13,326 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-06 03:09:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 03:09:13,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:13,327 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:13,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:13,544 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:13,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:13,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2021-05-06 03:09:13,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:13,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217845428] [2021-05-06 03:09:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:13,551 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:13,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251460421] [2021-05-06 03:09:13,551 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 03:09:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:13,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 03:09:13,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:13,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 03:09:13,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:13,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217845428] [2021-05-06 03:09:13,730 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:13,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251460421] [2021-05-06 03:09:13,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251460421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:13,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:13,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:09:13,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981589266] [2021-05-06 03:09:13,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:09:13,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:13,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:09:13,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:09:13,731 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:09:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:13,854 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2021-05-06 03:09:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:09:13,854 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 03:09:13,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:13,855 INFO L225 Difference]: With dead ends: 97 [2021-05-06 03:09:13,855 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 03:09:13,855 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:09:13,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 03:09:13,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-05-06 03:09:13,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 03:09:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2021-05-06 03:09:13,862 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 46 [2021-05-06 03:09:13,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:13,863 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2021-05-06 03:09:13,863 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:09:13,863 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2021-05-06 03:09:13,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 03:09:13,863 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:13,864 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:14,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:14,081 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:14,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:14,081 INFO L82 PathProgramCache]: Analyzing trace with hash 243046571, now seen corresponding path program 1 times [2021-05-06 03:09:14,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:14,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977680897] [2021-05-06 03:09:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:14,088 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:14,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647269072] [2021-05-06 03:09:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:09:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:14,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:09:14,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:14,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 03:09:14,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:14,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977680897] [2021-05-06 03:09:14,222 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:14,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647269072] [2021-05-06 03:09:14,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647269072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:14,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:14,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:09:14,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359375866] [2021-05-06 03:09:14,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:09:14,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:14,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:09:14,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:14,224 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 03:09:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:14,256 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2021-05-06 03:09:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:09:14,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-05-06 03:09:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:14,257 INFO L225 Difference]: With dead ends: 101 [2021-05-06 03:09:14,257 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 03:09:14,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:14,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 03:09:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 03:09:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 03:09:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-05-06 03:09:14,265 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 54 [2021-05-06 03:09:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:14,266 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-05-06 03:09:14,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 03:09:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-05-06 03:09:14,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 03:09:14,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:14,267 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:14,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 03:09:14,473 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:14,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:14,473 INFO L82 PathProgramCache]: Analyzing trace with hash 244774449, now seen corresponding path program 1 times [2021-05-06 03:09:14,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:14,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130880570] [2021-05-06 03:09:14,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:14,479 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:14,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446500829] [2021-05-06 03:09:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:14,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 03:09:14,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:14,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 03:09:14,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:14,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130880570] [2021-05-06 03:09:14,791 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:14,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446500829] [2021-05-06 03:09:14,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446500829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:14,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:14,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:09:14,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777152736] [2021-05-06 03:09:14,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:09:14,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:14,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:09:14,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:09:14,792 INFO L87 Difference]: Start difference. First operand 92 states and 106 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 03:09:14,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:14,921 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2021-05-06 03:09:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:09:14,922 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-06 03:09:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:14,922 INFO L225 Difference]: With dead ends: 104 [2021-05-06 03:09:14,922 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 03:09:14,923 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:14,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 03:09:14,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 03:09:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 63 states have internal predecessors, (69), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 03:09:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2021-05-06 03:09:14,929 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 54 [2021-05-06 03:09:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:14,929 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2021-05-06 03:09:14,929 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 03:09:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2021-05-06 03:09:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 03:09:14,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:14,930 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:15,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 03:09:15,149 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:15,150 INFO L82 PathProgramCache]: Analyzing trace with hash -318333104, now seen corresponding path program 2 times [2021-05-06 03:09:15,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:15,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434873250] [2021-05-06 03:09:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:15,170 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:15,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940705966] [2021-05-06 03:09:15,170 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 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 03:09:15,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-06 03:09:15,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:15,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:09:15,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:15,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-06 03:09:15,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:15,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434873250] [2021-05-06 03:09:15,368 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:15,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940705966] [2021-05-06 03:09:15,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940705966] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:15,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:15,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:09:15,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496180698] [2021-05-06 03:09:15,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:09:15,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:15,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:09:15,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:09:15,370 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:09:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:15,415 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2021-05-06 03:09:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:09:15,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2021-05-06 03:09:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:15,418 INFO L225 Difference]: With dead ends: 110 [2021-05-06 03:09:15,418 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 03:09:15,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 03:09:15,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-06 03:09:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 03:09:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2021-05-06 03:09:15,432 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 56 [2021-05-06 03:09:15,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:15,432 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2021-05-06 03:09:15,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:09:15,432 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2021-05-06 03:09:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 03:09:15,433 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:15,433 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:15,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:15,651 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:15,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:15,651 INFO L82 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 1 times [2021-05-06 03:09:15,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:15,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112451183] [2021-05-06 03:09:15,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:15,662 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:15,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674596790] [2021-05-06 03:09:15,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:15,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:09:15,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:15,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:15,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:15,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:15,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:15,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:15,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:15,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:15,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:15,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:15,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:15,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-06 03:09:15,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:15,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112451183] [2021-05-06 03:09:15,887 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:15,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674596790] [2021-05-06 03:09:15,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674596790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:15,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:15,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:09:15,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611471229] [2021-05-06 03:09:15,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:09:15,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:15,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:09:15,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:15,888 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 03:09:15,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:15,932 INFO L93 Difference]: Finished difference Result 134 states and 162 transitions. [2021-05-06 03:09:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:09:15,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-05-06 03:09:15,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:15,934 INFO L225 Difference]: With dead ends: 134 [2021-05-06 03:09:15,934 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 03:09:15,936 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 03:09:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-06 03:09:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 73 states have internal predecessors, (81), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 03:09:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2021-05-06 03:09:15,943 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 61 [2021-05-06 03:09:15,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:15,944 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2021-05-06 03:09:15,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 03:09:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2021-05-06 03:09:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 03:09:15,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:15,946 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:16,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:16,162 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:16,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1995039641, now seen corresponding path program 2 times [2021-05-06 03:09:16,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:16,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612964146] [2021-05-06 03:09:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:16,168 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:16,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884340332] [2021-05-06 03:09:16,168 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 03:09:16,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:09:16,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:16,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 03:09:16,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:16,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 03:09:16,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:16,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612964146] [2021-05-06 03:09:16,392 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:16,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884340332] [2021-05-06 03:09:16,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884340332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:16,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:16,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:09:16,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926572663] [2021-05-06 03:09:16,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:09:16,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:16,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:09:16,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:09:16,393 INFO L87 Difference]: Start difference. First operand 109 states and 126 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:09:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:16,511 INFO L93 Difference]: Finished difference Result 178 states and 237 transitions. [2021-05-06 03:09:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:09:16,512 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-05-06 03:09:16,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:16,513 INFO L225 Difference]: With dead ends: 178 [2021-05-06 03:09:16,513 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 03:09:16,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 03:09:16,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2021-05-06 03:09:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 92 states have internal predecessors, (106), 35 states have call successors, (35), 16 states have call predecessors, (35), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:09:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 173 transitions. [2021-05-06 03:09:16,520 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 173 transitions. Word has length 64 [2021-05-06 03:09:16,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:16,520 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 173 transitions. [2021-05-06 03:09:16,520 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:09:16,520 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 173 transitions. [2021-05-06 03:09:16,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 03:09:16,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:16,521 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:16,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 03:09:16,740 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:16,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:16,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1140868055, now seen corresponding path program 1 times [2021-05-06 03:09:16,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:16,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697710380] [2021-05-06 03:09:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:16,745 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:16,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282914432] [2021-05-06 03:09:16,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:16,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 03:09:16,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:16,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 03:09:16,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:16,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697710380] [2021-05-06 03:09:16,984 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:16,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282914432] [2021-05-06 03:09:16,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282914432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:16,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:16,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:09:16,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103014849] [2021-05-06 03:09:16,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:09:16,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:16,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:09:16,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:09:16,985 INFO L87 Difference]: Start difference. First operand 139 states and 173 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 03:09:17,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:17,042 INFO L93 Difference]: Finished difference Result 169 states and 198 transitions. [2021-05-06 03:09:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:09:17,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-05-06 03:09:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:17,044 INFO L225 Difference]: With dead ends: 169 [2021-05-06 03:09:17,044 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 03:09:17,046 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:17,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 03:09:17,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-05-06 03:09:17,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 100 states have (on average 1.16) internal successors, (116), 104 states have internal predecessors, (116), 35 states have call successors, (35), 20 states have call predecessors, (35), 19 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:09:17,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2021-05-06 03:09:17,073 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 68 [2021-05-06 03:09:17,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:17,074 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2021-05-06 03:09:17,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 03:09:17,074 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2021-05-06 03:09:17,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 03:09:17,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:17,075 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:17,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 03:09:17,275 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:17,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:17,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 1 times [2021-05-06 03:09:17,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:17,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648774409] [2021-05-06 03:09:17,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:17,281 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:17,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556892721] [2021-05-06 03:09:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 03:09:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:17,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 03:09:17,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:17,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 03:09:17,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:17,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648774409] [2021-05-06 03:09:17,672 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:17,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556892721] [2021-05-06 03:09:17,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556892721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:17,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:17,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 03:09:17,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939566335] [2021-05-06 03:09:17,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 03:09:17,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:17,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 03:09:17,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:09:17,673 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:09:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:17,908 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2021-05-06 03:09:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 03:09:17,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-06 03:09:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:17,910 INFO L225 Difference]: With dead ends: 163 [2021-05-06 03:09:17,910 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 03:09:17,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:09:17,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 03:09:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-05-06 03:09:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 107 states have internal predecessors, (119), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:09:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 186 transitions. [2021-05-06 03:09:17,917 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 186 transitions. Word has length 68 [2021-05-06 03:09:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:17,918 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 186 transitions. [2021-05-06 03:09:17,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:09:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 186 transitions. [2021-05-06 03:09:17,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 03:09:17,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:17,918 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:18,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 03:09:18,136 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:18,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 1 times [2021-05-06 03:09:18,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:18,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884379980] [2021-05-06 03:09:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:18,141 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:18,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691568374] [2021-05-06 03:09:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:18,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 03:09:18,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:18,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 03:09:18,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:18,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884379980] [2021-05-06 03:09:18,451 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:18,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691568374] [2021-05-06 03:09:18,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691568374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:18,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:18,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:09:18,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759500388] [2021-05-06 03:09:18,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:09:18,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:18,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:09:18,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:18,452 INFO L87 Difference]: Start difference. First operand 159 states and 186 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 03:09:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:18,650 INFO L93 Difference]: Finished difference Result 225 states and 281 transitions. [2021-05-06 03:09:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:09:18,651 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2021-05-06 03:09:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:18,652 INFO L225 Difference]: With dead ends: 225 [2021-05-06 03:09:18,652 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 03:09:18,652 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:09:18,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 03:09:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2021-05-06 03:09:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 95 states have internal predecessors, (108), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 03:09:18,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2021-05-06 03:09:18,660 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 79 [2021-05-06 03:09:18,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:18,660 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2021-05-06 03:09:18,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 03:09:18,660 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2021-05-06 03:09:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 03:09:18,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:18,661 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:18,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:18,877 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:18,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:18,878 INFO L82 PathProgramCache]: Analyzing trace with hash 816704307, now seen corresponding path program 2 times [2021-05-06 03:09:18,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:18,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778436707] [2021-05-06 03:09:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:18,883 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:18,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658364723] [2021-05-06 03:09:18,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:18,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:09:18,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:18,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 03:09:18,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:18,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:18,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:19,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:19,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 03:09:19,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:19,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778436707] [2021-05-06 03:09:19,029 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:19,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658364723] [2021-05-06 03:09:19,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658364723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:19,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:19,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:09:19,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562507985] [2021-05-06 03:09:19,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:09:19,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:19,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:09:19,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:09:19,030 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 03:09:19,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:19,087 INFO L93 Difference]: Finished difference Result 170 states and 211 transitions. [2021-05-06 03:09:19,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:09:19,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 79 [2021-05-06 03:09:19,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:19,088 INFO L225 Difference]: With dead ends: 170 [2021-05-06 03:09:19,088 INFO L226 Difference]: Without dead ends: 145 [2021-05-06 03:09:19,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:19,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-06 03:09:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-06 03:09:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 97 states have internal predecessors, (110), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 03:09:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2021-05-06 03:09:19,096 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 79 [2021-05-06 03:09:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:19,096 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2021-05-06 03:09:19,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 03:09:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2021-05-06 03:09:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 03:09:19,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:19,096 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:19,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 03:09:19,314 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:19,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:19,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1229238971, now seen corresponding path program 3 times [2021-05-06 03:09:19,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:19,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231601716] [2021-05-06 03:09:19,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:19,319 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:19,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081040136] [2021-05-06 03:09:19,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:19,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 03:09:19,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:19,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 03:09:19,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:19,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:19,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:19,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 62 proven. 7 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-06 03:09:19,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:19,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231601716] [2021-05-06 03:09:19,682 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:19,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081040136] [2021-05-06 03:09:19,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081040136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:19,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:19,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:09:19,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902434619] [2021-05-06 03:09:19,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:09:19,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:19,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:09:19,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:19,683 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 03:09:19,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:19,999 INFO L93 Difference]: Finished difference Result 185 states and 227 transitions. [2021-05-06 03:09:19,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:09:20,000 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2021-05-06 03:09:20,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:20,001 INFO L225 Difference]: With dead ends: 185 [2021-05-06 03:09:20,001 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 03:09:20,001 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:20,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 03:09:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2021-05-06 03:09:20,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 113 states have internal predecessors, (127), 40 states have call successors, (40), 20 states have call predecessors, (40), 19 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 03:09:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 204 transitions. [2021-05-06 03:09:20,013 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 204 transitions. Word has length 82 [2021-05-06 03:09:20,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:20,013 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 204 transitions. [2021-05-06 03:09:20,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 03:09:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 204 transitions. [2021-05-06 03:09:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 03:09:20,014 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:20,015 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 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, 1, 1, 1, 1] [2021-05-06 03:09:20,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:20,234 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:20,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:20,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1069895175, now seen corresponding path program 2 times [2021-05-06 03:09:20,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:20,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524058776] [2021-05-06 03:09:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:20,246 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:20,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790020393] [2021-05-06 03:09:20,246 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 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 03:09:20,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:09:20,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:20,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:09:20,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:20,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 03:09:20,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:20,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524058776] [2021-05-06 03:09:20,428 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:20,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790020393] [2021-05-06 03:09:20,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790020393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:20,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:20,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:09:20,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952999961] [2021-05-06 03:09:20,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:09:20,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:20,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:09:20,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:20,430 INFO L87 Difference]: Start difference. First operand 167 states and 204 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 03:09:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:20,507 INFO L93 Difference]: Finished difference Result 207 states and 244 transitions. [2021-05-06 03:09:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:09:20,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 86 [2021-05-06 03:09:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:20,508 INFO L225 Difference]: With dead ends: 207 [2021-05-06 03:09:20,508 INFO L226 Difference]: Without dead ends: 194 [2021-05-06 03:09:20,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:09:20,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-06 03:09:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-05-06 03:09:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 125 states have (on average 1.16) internal successors, (145), 131 states have internal predecessors, (145), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (40), 36 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-06 03:09:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 228 transitions. [2021-05-06 03:09:20,519 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 228 transitions. Word has length 86 [2021-05-06 03:09:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:20,519 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 228 transitions. [2021-05-06 03:09:20,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 03:09:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 228 transitions. [2021-05-06 03:09:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 03:09:20,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:20,520 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:20,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:20,739 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:20,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:20,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1068167297, now seen corresponding path program 2 times [2021-05-06 03:09:20,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:20,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743942692] [2021-05-06 03:09:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:20,745 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:20,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036668152] [2021-05-06 03:09:20,746 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 03:09:20,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:09:20,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:20,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 03:09:20,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:20,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:20,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 36 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 03:09:21,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:21,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743942692] [2021-05-06 03:09:21,274 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:21,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036668152] [2021-05-06 03:09:21,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036668152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:21,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:21,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 03:09:21,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491842216] [2021-05-06 03:09:21,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 03:09:21,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:21,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 03:09:21,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-06 03:09:21,276 INFO L87 Difference]: Start difference. First operand 193 states and 228 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 03:09:21,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:21,745 INFO L93 Difference]: Finished difference Result 205 states and 242 transitions. [2021-05-06 03:09:21,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 03:09:21,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 86 [2021-05-06 03:09:21,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:21,747 INFO L225 Difference]: With dead ends: 205 [2021-05-06 03:09:21,747 INFO L226 Difference]: Without dead ends: 203 [2021-05-06 03:09:21,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 173.1ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 03:09:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-06 03:09:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 200. [2021-05-06 03:09:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 137 states have internal predecessors, (151), 44 states have call successors, (44), 26 states have call predecessors, (44), 25 states have return successors, (41), 36 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 03:09:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 236 transitions. [2021-05-06 03:09:21,759 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 236 transitions. Word has length 86 [2021-05-06 03:09:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:21,759 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 236 transitions. [2021-05-06 03:09:21,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 03:09:21,759 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 236 transitions. [2021-05-06 03:09:21,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 03:09:21,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:21,760 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 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] [2021-05-06 03:09:21,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 03:09:21,977 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash 114996177, now seen corresponding path program 3 times [2021-05-06 03:09:21,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:21,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799368201] [2021-05-06 03:09:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:21,986 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:21,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442544313] [2021-05-06 03:09:21,986 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 03:09:22,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-06 03:09:22,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:22,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:09:22,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:22,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-05-06 03:09:22,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:22,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799368201] [2021-05-06 03:09:22,301 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:22,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442544313] [2021-05-06 03:09:22,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442544313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:22,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:22,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:09:22,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261751469] [2021-05-06 03:09:22,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:09:22,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:22,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:09:22,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:22,302 INFO L87 Difference]: Start difference. First operand 200 states and 236 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 03:09:22,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:22,404 INFO L93 Difference]: Finished difference Result 245 states and 301 transitions. [2021-05-06 03:09:22,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 03:09:22,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 97 [2021-05-06 03:09:22,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:22,406 INFO L225 Difference]: With dead ends: 245 [2021-05-06 03:09:22,406 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 03:09:22,407 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:09:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 03:09:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-05-06 03:09:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 132 states have (on average 1.1590909090909092) internal successors, (153), 139 states have internal predecessors, (153), 44 states have call successors, (44), 26 states have call predecessors, (44), 25 states have return successors, (41), 36 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 03:09:22,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 238 transitions. [2021-05-06 03:09:22,421 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 238 transitions. Word has length 97 [2021-05-06 03:09:22,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:22,421 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 238 transitions. [2021-05-06 03:09:22,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 03:09:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 238 transitions. [2021-05-06 03:09:22,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 03:09:22,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:22,422 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:22,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:22,648 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:22,649 INFO L82 PathProgramCache]: Analyzing trace with hash -545719131, now seen corresponding path program 3 times [2021-05-06 03:09:22,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:22,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265205945] [2021-05-06 03:09:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:22,653 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:22,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234273160] [2021-05-06 03:09:22,654 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 03:09:22,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:09:22,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:22,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 03:09:22,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:22,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:22,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:23,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:23,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:23,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:23,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:23,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:23,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:23,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 61 proven. 29 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-05-06 03:09:23,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:23,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265205945] [2021-05-06 03:09:23,166 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:23,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234273160] [2021-05-06 03:09:23,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234273160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:23,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:23,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 03:09:23,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28607703] [2021-05-06 03:09:23,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 03:09:23,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:23,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 03:09:23,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-06 03:09:23,167 INFO L87 Difference]: Start difference. First operand 202 states and 238 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:09:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:24,096 INFO L93 Difference]: Finished difference Result 215 states and 250 transitions. [2021-05-06 03:09:24,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 03:09:24,097 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2021-05-06 03:09:24,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:24,097 INFO L225 Difference]: With dead ends: 215 [2021-05-06 03:09:24,098 INFO L226 Difference]: Without dead ends: 192 [2021-05-06 03:09:24,098 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-06 03:09:24,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-06 03:09:24,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-05-06 03:09:24,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 126 states have (on average 1.1428571428571428) internal successors, (144), 132 states have internal predecessors, (144), 41 states have call successors, (41), 25 states have call predecessors, (41), 24 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-06 03:09:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 223 transitions. [2021-05-06 03:09:24,106 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 223 transitions. Word has length 100 [2021-05-06 03:09:24,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:24,107 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 223 transitions. [2021-05-06 03:09:24,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:09:24,107 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 223 transitions. [2021-05-06 03:09:24,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 03:09:24,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:24,107 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:24,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 03:09:24,325 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:24,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:24,326 INFO L82 PathProgramCache]: Analyzing trace with hash -543991253, now seen corresponding path program 3 times [2021-05-06 03:09:24,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:24,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264921127] [2021-05-06 03:09:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:24,340 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:24,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920703915] [2021-05-06 03:09:24,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:25,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:09:25,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:25,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 03:09:25,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:25,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 03:09:25,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:25,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264921127] [2021-05-06 03:09:25,820 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:25,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920703915] [2021-05-06 03:09:25,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920703915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:25,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:25,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 03:09:25,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497222518] [2021-05-06 03:09:25,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 03:09:25,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:25,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 03:09:25,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 03:09:25,821 INFO L87 Difference]: Start difference. First operand 192 states and 223 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:09:26,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:26,114 INFO L93 Difference]: Finished difference Result 198 states and 228 transitions. [2021-05-06 03:09:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 03:09:26,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2021-05-06 03:09:26,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:26,115 INFO L225 Difference]: With dead ends: 198 [2021-05-06 03:09:26,115 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 03:09:26,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 03:09:26,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 03:09:26,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-05-06 03:09:26,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 36 states have call successors, (36), 21 states have call predecessors, (36), 20 states have return successors, (34), 30 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 03:09:26,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2021-05-06 03:09:26,124 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 100 [2021-05-06 03:09:26,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:26,124 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2021-05-06 03:09:26,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:09:26,124 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2021-05-06 03:09:26,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 03:09:26,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:26,125 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:26,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 03:09:26,330 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:26,331 INFO L82 PathProgramCache]: Analyzing trace with hash -392782949, now seen corresponding path program 4 times [2021-05-06 03:09:26,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:26,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218462287] [2021-05-06 03:09:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:26,337 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:26,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38871314] [2021-05-06 03:09:26,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:26,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 03:09:26,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 03:09:26,430 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 03:09:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 03:09:26,456 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 03:09:26,569 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 03:09:26,570 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 03:09:26,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:26,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 03:09:26 BoogieIcfgContainer [2021-05-06 03:09:26,881 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 03:09:26,881 INFO L168 Benchmark]: Toolchain (without parser) took 16728.81 ms. Allocated memory was 168.8 MB in the beginning and 325.1 MB in the end (delta: 156.2 MB). Free memory was 132.4 MB in the beginning and 197.8 MB in the end (delta: -65.4 MB). Peak memory consumption was 91.1 MB. Max. memory is 8.0 GB. [2021-05-06 03:09:26,881 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 168.8 MB. Free memory is still 148.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 03:09:26,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.85 ms. Allocated memory is still 168.8 MB. Free memory was 132.2 MB in the beginning and 150.0 MB in the end (delta: -17.8 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2021-05-06 03:09:26,881 INFO L168 Benchmark]: Boogie Preprocessor took 33.97 ms. Allocated memory is still 168.8 MB. Free memory was 150.0 MB in the beginning and 148.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 03:09:26,881 INFO L168 Benchmark]: RCFGBuilder took 225.98 ms. Allocated memory is still 168.8 MB. Free memory was 148.3 MB in the beginning and 132.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 03:09:26,881 INFO L168 Benchmark]: TraceAbstraction took 16217.71 ms. Allocated memory was 168.8 MB in the beginning and 325.1 MB in the end (delta: 156.2 MB). Free memory was 132.2 MB in the beginning and 197.8 MB in the end (delta: -65.7 MB). Peak memory consumption was 91.6 MB. Max. memory is 8.0 GB. [2021-05-06 03:09:26,882 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 168.8 MB. Free memory is still 148.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 245.85 ms. Allocated memory is still 168.8 MB. Free memory was 132.2 MB in the beginning and 150.0 MB in the end (delta: -17.8 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.97 ms. Allocated memory is still 168.8 MB. Free memory was 150.0 MB in the beginning and 148.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 225.98 ms. Allocated memory is still 168.8 MB. Free memory was 148.3 MB in the beginning and 132.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16217.71 ms. Allocated memory was 168.8 MB in the beginning and 325.1 MB in the end (delta: 156.2 MB). Free memory was 132.2 MB in the beginning and 197.8 MB in the end (delta: -65.7 MB). Peak memory consumption was 91.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=20, counter=0] [L24] unsigned int A, B; [L25] long long r, d, p, q; [L26] A = __VERIFIER_nondet_unsigned_int() [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L12] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(B >= 1) VAL [\old(counter)=0, B=1, counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [\old(counter)=0, A=4, B=1, counter=0, d=1, p=1, q=0, r=4] [L35] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=4, B=1, counter=1, d=2, p=2, q=0, r=4] [L35] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=4, B=1, counter=2, d=4, p=4, q=0, r=4] [L35] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=3, counter++=2, d=4, p=4, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=4, B=1, counter=3, d=8, p=8, q=0, r=4] [L35] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=4, counter++=3, d=8, p=8, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L39] COND TRUE !(r >= d) VAL [\old(counter)=0, A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L45] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=5, counter++=4, d=8, p=8, q=0, r=4] [L45] COND TRUE counter++<5 [L46] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L46] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=4, B=1, counter=5, d=8, p=8, q=0, r=4] [L47] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L47] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=4, B=1, counter=5, d=8, p=8, q=0, r=4] [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 VAL [\old(counter)=0, A=4, B=1, counter=5, d=4, p=4, q=0, r=4] [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p VAL [\old(counter)=0, A=4, B=1, counter=5, d=4, p=4, q=4, r=0] [L45] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=6, counter++=5, d=4, p=4, q=4, r=0] [L45] COND FALSE !(counter++<5) [L59] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16107.6ms, OverallIterations: 25, TraceHistogramMax: 15, EmptinessCheckTime: 19.9ms, AutomataDifference: 3913.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1121 SDtfs, 486 SDslu, 4068 SDs, 0 SdLazy, 2889 SolverSat, 360 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2629.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1390 GetRequests, 1207 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1744.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=202occurred in iteration=22, InterpolantAutomatonStates: 200, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 213.4ms AutomataMinimizationTime, 24 MinimizatonAttempts, 56 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 177.2ms SsaConstructionTime, 1738.4ms SatisfiabilityAnalysisTime, 3937.5ms InterpolantComputationTime, 1501 NumberOfCodeBlocks, 1366 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 1373 ConstructedInterpolants, 0 QuantifiedInterpolants, 6994 SizeOfPredicates, 64 NumberOfNonLiveVariables, 4071 ConjunctsInSsa, 340 ConjunctsInUnsatCore, 24 InterpolantComputations, 8 PerfectInterpolantSequences, 2310/3235 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...