/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/loop-new/gauss_sum.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 00:10:14,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 00:10:14,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 00:10:14,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 00:10:14,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 00:10:14,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 00:10:14,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 00:10:14,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 00:10:14,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 00:10:14,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 00:10:14,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 00:10:14,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 00:10:14,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 00:10:14,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 00:10:14,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 00:10:14,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 00:10:14,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 00:10:14,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 00:10:14,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 00:10:14,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 00:10:14,100 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 00:10:14,122 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 00:10:14,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 00:10:14,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 00:10:14,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 00:10:14,124 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 00:10:14,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 00:10:14,125 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 00:10:14,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 00:10:14,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 00:10:14,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 00:10:14,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 00:10:14,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 00:10:14,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 00:10:14,137 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 00:10:14,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 00:10:14,137 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 00:10:14,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 00:10:14,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 00:10:14,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 00:10:14,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 00:10:14,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 00:10:14,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 00:10:14,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 00:10:14,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 00:10:14,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 00:10:14,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 00:10:14,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 00:10:14,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 00:10:14,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 00:10:14,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 00:10:14,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 00:10:14,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 00:10:14,450 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 00:10:14,451 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 00:10:14,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2021-05-06 00:10:14,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/119b52d62/690a6e01b37a48c79b7e1865873fd222/FLAGa8dad6c79 [2021-05-06 00:10:14,853 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 00:10:14,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2021-05-06 00:10:14,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/119b52d62/690a6e01b37a48c79b7e1865873fd222/FLAGa8dad6c79 [2021-05-06 00:10:14,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/119b52d62/690a6e01b37a48c79b7e1865873fd222 [2021-05-06 00:10:14,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 00:10:14,902 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 00:10:14,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 00:10:14,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 00:10:14,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 00:10:14,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:10:14" (1/1) ... [2021-05-06 00:10:14,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f4b85d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:14, skipping insertion in model container [2021-05-06 00:10:14,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:10:14" (1/1) ... [2021-05-06 00:10:14,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 00:10:14,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 00:10:15,059 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c[1014,1027] [2021-05-06 00:10:15,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 00:10:15,069 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 00:10:15,082 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c[1014,1027] [2021-05-06 00:10:15,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 00:10:15,096 INFO L208 MainTranslator]: Completed translation [2021-05-06 00:10:15,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:15 WrapperNode [2021-05-06 00:10:15,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 00:10:15,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 00:10:15,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 00:10:15,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 00:10:15,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:15" (1/1) ... [2021-05-06 00:10:15,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:15" (1/1) ... [2021-05-06 00:10:15,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:15" (1/1) ... [2021-05-06 00:10:15,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:15" (1/1) ... [2021-05-06 00:10:15,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:15" (1/1) ... [2021-05-06 00:10:15,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:15" (1/1) ... [2021-05-06 00:10:15,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:15" (1/1) ... [2021-05-06 00:10:15,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 00:10:15,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 00:10:15,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 00:10:15,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 00:10:15,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:15" (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 00:10:15,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 00:10:15,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 00:10:15,198 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 00:10:15,198 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 00:10:15,199 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 00:10:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 00:10:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 00:10:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 00:10:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 00:10:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 00:10:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 00:10:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 00:10:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 00:10:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 00:10:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 00:10:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 00:10:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 00:10:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 00:10:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 00:10:15,417 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 00:10:15,417 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-06 00:10:15,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:10:15 BoogieIcfgContainer [2021-05-06 00:10:15,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 00:10:15,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 00:10:15,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 00:10:15,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 00:10:15,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:10:14" (1/3) ... [2021-05-06 00:10:15,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b0f87c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:10:15, skipping insertion in model container [2021-05-06 00:10:15,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:10:15" (2/3) ... [2021-05-06 00:10:15,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b0f87c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:10:15, skipping insertion in model container [2021-05-06 00:10:15,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:10:15" (3/3) ... [2021-05-06 00:10:15,424 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.c [2021-05-06 00:10:15,427 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 00:10:15,429 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 00:10:15,451 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 00:10:15,466 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 00:10:15,467 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 00:10:15,467 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 00:10:15,467 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 00:10:15,467 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 00:10:15,467 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 00:10:15,467 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 00:10:15,467 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 00:10:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 00:10:15,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 00:10:15,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:15,481 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:15,481 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:15,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1088558671, now seen corresponding path program 1 times [2021-05-06 00:10:15,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:15,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606693077] [2021-05-06 00:10:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:15,558 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:15,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236965235] [2021-05-06 00:10:15,559 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 00:10:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:10:15,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 00:10:15,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:15,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:15,743 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 00:10:15,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:15,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606693077] [2021-05-06 00:10:15,744 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:15,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236965235] [2021-05-06 00:10:15,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236965235] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 00:10:15,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 00:10:15,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 00:10:15,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441955742] [2021-05-06 00:10:15,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 00:10:15,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:15,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 00:10:15,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 00:10:15,756 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:15,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:15,788 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-05-06 00:10:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 00:10:15,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 00:10:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:15,794 INFO L225 Difference]: With dead ends: 26 [2021-05-06 00:10:15,794 INFO L226 Difference]: Without dead ends: 13 [2021-05-06 00:10:15,795 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 00:10:15,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-06 00:10:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-06 00:10:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-06 00:10:15,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-06 00:10:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:15,815 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-06 00:10:15,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-06 00:10:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 00:10:15,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:15,816 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:16,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 00:10:16,033 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:16,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:16,034 INFO L82 PathProgramCache]: Analyzing trace with hash 614357099, now seen corresponding path program 1 times [2021-05-06 00:10:16,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:16,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171606508] [2021-05-06 00:10:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:16,048 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:16,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354878407] [2021-05-06 00:10:16,049 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 00:10:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:10:16,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 00:10:16,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:16,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:16,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:16,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:16,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:16,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:16,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171606508] [2021-05-06 00:10:16,336 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:16,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354878407] [2021-05-06 00:10:16,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354878407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:16,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:16,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 00:10:16,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61726144] [2021-05-06 00:10:16,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 00:10:16,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:16,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 00:10:16,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 00:10:16,339 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:16,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:16,384 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-05-06 00:10:16,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 00:10:16,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 00:10:16,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:16,387 INFO L225 Difference]: With dead ends: 17 [2021-05-06 00:10:16,388 INFO L226 Difference]: Without dead ends: 14 [2021-05-06 00:10:16,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 00:10:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-06 00:10:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-06 00:10:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-06 00:10:16,396 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-06 00:10:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:16,396 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-06 00:10:16,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-06 00:10:16,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 00:10:16,399 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:16,399 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:16,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:16,609 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:16,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:16,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1865138417, now seen corresponding path program 2 times [2021-05-06 00:10:16,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:16,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29240895] [2021-05-06 00:10:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:16,621 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:16,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457327640] [2021-05-06 00:10:16,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:16,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:10:16,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:16,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 00:10:16,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:16,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:16,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:16,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:16,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:16,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:16,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29240895] [2021-05-06 00:10:16,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:16,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457327640] [2021-05-06 00:10:16,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457327640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:16,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:16,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 00:10:16,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098062720] [2021-05-06 00:10:16,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 00:10:16,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:16,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 00:10:16,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 00:10:16,834 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:16,873 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-06 00:10:16,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 00:10:16,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-06 00:10:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:16,874 INFO L225 Difference]: With dead ends: 18 [2021-05-06 00:10:16,874 INFO L226 Difference]: Without dead ends: 15 [2021-05-06 00:10:16,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 00:10:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-06 00:10:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-06 00:10:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-06 00:10:16,893 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-06 00:10:16,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:16,893 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-06 00:10:16,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:16,893 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-06 00:10:16,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 00:10:16,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:16,893 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:17,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:17,099 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:17,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1984653611, now seen corresponding path program 3 times [2021-05-06 00:10:17,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:17,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103641323] [2021-05-06 00:10:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:17,128 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:17,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79136305] [2021-05-06 00:10:17,129 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 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 00:10:17,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 00:10:17,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:17,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 00:10:17,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:17,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:17,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:17,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:17,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:17,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:17,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103641323] [2021-05-06 00:10:17,303 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:17,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79136305] [2021-05-06 00:10:17,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79136305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:17,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:17,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 00:10:17,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670972885] [2021-05-06 00:10:17,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 00:10:17,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:17,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 00:10:17,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 00:10:17,304 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:17,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:17,356 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-05-06 00:10:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 00:10:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 00:10:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:17,358 INFO L225 Difference]: With dead ends: 19 [2021-05-06 00:10:17,358 INFO L226 Difference]: Without dead ends: 16 [2021-05-06 00:10:17,359 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 00:10:17,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-06 00:10:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-06 00:10:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-06 00:10:17,361 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-05-06 00:10:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:17,361 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-06 00:10:17,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:17,362 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-06 00:10:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 00:10:17,362 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:17,362 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:17,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:17,565 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:17,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:17,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1394657329, now seen corresponding path program 4 times [2021-05-06 00:10:17,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:17,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134530503] [2021-05-06 00:10:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:17,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:17,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995186660] [2021-05-06 00:10:17,586 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 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 00:10:17,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:10:17,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:17,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 00:10:17,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:17,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:17,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:17,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:17,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:17,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:17,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134530503] [2021-05-06 00:10:17,796 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:17,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995186660] [2021-05-06 00:10:17,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995186660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:17,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:17,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 00:10:17,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912284900] [2021-05-06 00:10:17,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 00:10:17,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:17,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 00:10:17,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-06 00:10:17,797 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:17,844 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-06 00:10:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 00:10:17,845 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 00:10:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:17,845 INFO L225 Difference]: With dead ends: 20 [2021-05-06 00:10:17,845 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 00:10:17,846 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 00:10:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 00:10:17,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 00:10:17,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-06 00:10:17,848 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-05-06 00:10:17,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:17,848 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-06 00:10:17,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:17,848 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-06 00:10:17,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 00:10:17,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:17,849 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:18,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 00:10:18,049 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:18,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:18,050 INFO L82 PathProgramCache]: Analyzing trace with hash 284641771, now seen corresponding path program 5 times [2021-05-06 00:10:18,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:18,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548768491] [2021-05-06 00:10:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:18,076 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:18,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636512500] [2021-05-06 00:10:18,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:10:18,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-06 00:10:18,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:18,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 00:10:18,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:18,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:18,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:18,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:18,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:18,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:18,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548768491] [2021-05-06 00:10:18,249 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:18,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636512500] [2021-05-06 00:10:18,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636512500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:18,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:18,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 00:10:18,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956085545] [2021-05-06 00:10:18,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 00:10:18,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:18,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 00:10:18,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 00:10:18,250 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:18,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:18,319 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-06 00:10:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 00:10:18,320 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-06 00:10:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:18,320 INFO L225 Difference]: With dead ends: 21 [2021-05-06 00:10:18,320 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 00:10:18,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 00:10:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 00:10:18,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-06 00:10:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-06 00:10:18,323 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-05-06 00:10:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:18,323 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-06 00:10:18,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-06 00:10:18,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 00:10:18,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:18,324 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:18,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:18,537 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:18,537 INFO L82 PathProgramCache]: Analyzing trace with hash 233897841, now seen corresponding path program 6 times [2021-05-06 00:10:18,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:18,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520029634] [2021-05-06 00:10:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:18,548 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:18,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893132228] [2021-05-06 00:10:18,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:10:18,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-06 00:10:18,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:18,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 00:10:18,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:18,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:18,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:18,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:18,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:18,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:18,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520029634] [2021-05-06 00:10:18,722 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:18,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893132228] [2021-05-06 00:10:18,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893132228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:18,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:18,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 00:10:18,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945941602] [2021-05-06 00:10:18,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 00:10:18,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:18,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 00:10:18,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 00:10:18,724 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:18,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:18,799 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-06 00:10:18,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 00:10:18,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 00:10:18,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:18,801 INFO L225 Difference]: With dead ends: 22 [2021-05-06 00:10:18,801 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 00:10:18,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 00:10:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 00:10:18,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 00:10:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:18,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-06 00:10:18,807 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-05-06 00:10:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:18,808 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-06 00:10:18,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-06 00:10:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 00:10:18,810 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:18,810 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:19,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 00:10:19,032 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:19,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163989, now seen corresponding path program 7 times [2021-05-06 00:10:19,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:19,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802002852] [2021-05-06 00:10:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:19,040 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:19,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977132773] [2021-05-06 00:10:19,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:10:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:10:19,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 00:10:19,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:19,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:19,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:19,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:19,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:19,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:19,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802002852] [2021-05-06 00:10:19,215 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:19,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977132773] [2021-05-06 00:10:19,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977132773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:19,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:19,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 00:10:19,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692348244] [2021-05-06 00:10:19,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 00:10:19,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:19,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 00:10:19,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 00:10:19,217 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:19,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:19,281 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-06 00:10:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 00:10:19,281 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 00:10:19,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:19,282 INFO L225 Difference]: With dead ends: 23 [2021-05-06 00:10:19,282 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 00:10:19,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 00:10:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 00:10:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 00:10:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:19,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-05-06 00:10:19,290 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2021-05-06 00:10:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:19,290 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-05-06 00:10:19,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-05-06 00:10:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 00:10:19,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:19,291 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:19,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:19,510 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:19,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:19,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1435526833, now seen corresponding path program 8 times [2021-05-06 00:10:19,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:19,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662531674] [2021-05-06 00:10:19,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:19,523 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:19,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737810379] [2021-05-06 00:10:19,523 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 00:10:19,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:10:19,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:19,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 00:10:19,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:19,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:19,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:19,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:19,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:19,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:19,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662531674] [2021-05-06 00:10:19,702 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:19,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737810379] [2021-05-06 00:10:19,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737810379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:19,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:19,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 00:10:19,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587388529] [2021-05-06 00:10:19,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 00:10:19,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:19,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 00:10:19,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 00:10:19,703 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:19,767 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-06 00:10:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 00:10:19,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-06 00:10:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:19,768 INFO L225 Difference]: With dead ends: 24 [2021-05-06 00:10:19,768 INFO L226 Difference]: Without dead ends: 21 [2021-05-06 00:10:19,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 00:10:19,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-06 00:10:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-06 00:10:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-06 00:10:19,771 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2021-05-06 00:10:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:19,771 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-06 00:10:19,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-06 00:10:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 00:10:19,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:19,772 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:19,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:19,990 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:19,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:19,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1551596395, now seen corresponding path program 9 times [2021-05-06 00:10:19,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:19,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240235740] [2021-05-06 00:10:19,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:19,998 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:19,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156405698] [2021-05-06 00:10:19,998 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 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 00:10:20,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-06 00:10:20,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:20,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 00:10:20,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:20,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:20,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:20,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:20,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:20,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:20,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240235740] [2021-05-06 00:10:20,221 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:20,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156405698] [2021-05-06 00:10:20,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156405698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:20,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:20,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 00:10:20,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230385076] [2021-05-06 00:10:20,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 00:10:20,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:20,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 00:10:20,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-06 00:10:20,223 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:20,311 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-05-06 00:10:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 00:10:20,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-06 00:10:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:20,313 INFO L225 Difference]: With dead ends: 25 [2021-05-06 00:10:20,313 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 00:10:20,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-06 00:10:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 00:10:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-06 00:10:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:20,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-05-06 00:10:20,316 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-05-06 00:10:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:20,317 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-05-06 00:10:20,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-05-06 00:10:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 00:10:20,317 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:20,317 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:20,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 00:10:20,535 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:20,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:20,535 INFO L82 PathProgramCache]: Analyzing trace with hash 854785521, now seen corresponding path program 10 times [2021-05-06 00:10:20,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:20,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271555774] [2021-05-06 00:10:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:20,545 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:20,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874160774] [2021-05-06 00:10:20,546 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 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 00:10:20,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:10:20,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:20,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-06 00:10:20,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:20,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:20,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:20,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:20,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:20,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:20,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271555774] [2021-05-06 00:10:20,752 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:20,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874160774] [2021-05-06 00:10:20,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874160774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:20,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:20,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 00:10:20,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345278792] [2021-05-06 00:10:20,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 00:10:20,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:20,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 00:10:20,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 00:10:20,754 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:20,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:20,852 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-06 00:10:20,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 00:10:20,853 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-06 00:10:20,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:20,853 INFO L225 Difference]: With dead ends: 26 [2021-05-06 00:10:20,853 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 00:10:20,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-05-06 00:10:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 00:10:20,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 00:10:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-06 00:10:20,856 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2021-05-06 00:10:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:20,856 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-06 00:10:20,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-06 00:10:20,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 00:10:20,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:20,857 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:21,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 00:10:21,073 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:21,073 INFO L82 PathProgramCache]: Analyzing trace with hash 728484907, now seen corresponding path program 11 times [2021-05-06 00:10:21,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:21,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768640102] [2021-05-06 00:10:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:21,082 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:21,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460010172] [2021-05-06 00:10:21,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:10:21,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 00:10:21,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:21,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 00:10:21,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:21,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:21,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:21,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:21,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:21,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:21,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768640102] [2021-05-06 00:10:21,322 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:21,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460010172] [2021-05-06 00:10:21,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460010172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:21,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:21,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 00:10:21,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934912145] [2021-05-06 00:10:21,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 00:10:21,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:21,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 00:10:21,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-06 00:10:21,323 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:21,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:21,430 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-06 00:10:21,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 00:10:21,431 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-06 00:10:21,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:21,432 INFO L225 Difference]: With dead ends: 27 [2021-05-06 00:10:21,432 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 00:10:21,433 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-05-06 00:10:21,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 00:10:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 00:10:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:21,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-06 00:10:21,440 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-05-06 00:10:21,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:21,440 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-06 00:10:21,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-06 00:10:21,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 00:10:21,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:21,441 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:21,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:21,657 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:21,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1108133169, now seen corresponding path program 12 times [2021-05-06 00:10:21,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:21,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504604731] [2021-05-06 00:10:21,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:21,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:21,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402582055] [2021-05-06 00:10:21,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:10:21,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 00:10:21,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:21,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-06 00:10:21,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:21,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:21,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:21,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:21,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:21,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:21,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504604731] [2021-05-06 00:10:21,947 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:21,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402582055] [2021-05-06 00:10:21,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402582055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:21,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:21,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 00:10:21,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933299564] [2021-05-06 00:10:21,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 00:10:21,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:21,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 00:10:21,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-06 00:10:21,948 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:22,091 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-06 00:10:22,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 00:10:22,091 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-06 00:10:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:22,093 INFO L225 Difference]: With dead ends: 28 [2021-05-06 00:10:22,093 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 00:10:22,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-05-06 00:10:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 00:10:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 00:10:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-06 00:10:22,098 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2021-05-06 00:10:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:22,098 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-06 00:10:22,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-06 00:10:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 00:10:22,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:22,101 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:22,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 00:10:22,317 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:22,317 INFO L82 PathProgramCache]: Analyzing trace with hash -7672597, now seen corresponding path program 13 times [2021-05-06 00:10:22,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:22,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634595127] [2021-05-06 00:10:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:22,323 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:22,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718159087] [2021-05-06 00:10:22,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:10:22,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-06 00:10:22,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:22,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:22,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:22,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:22,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:22,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:22,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634595127] [2021-05-06 00:10:22,596 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:22,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718159087] [2021-05-06 00:10:22,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718159087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:22,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:22,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 00:10:22,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238591835] [2021-05-06 00:10:22,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 00:10:22,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:22,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 00:10:22,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-05-06 00:10:22,598 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:22,732 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-06 00:10:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 00:10:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-06 00:10:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:22,733 INFO L225 Difference]: With dead ends: 29 [2021-05-06 00:10:22,733 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 00:10:22,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-05-06 00:10:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 00:10:22,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 00:10:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-05-06 00:10:22,737 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2021-05-06 00:10:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:22,737 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-05-06 00:10:22,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-05-06 00:10:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 00:10:22,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:22,738 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:22,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:22,959 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:22,959 INFO L82 PathProgramCache]: Analyzing trace with hash -237912975, now seen corresponding path program 14 times [2021-05-06 00:10:22,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:22,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187766468] [2021-05-06 00:10:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:22,970 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:22,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091272865] [2021-05-06 00:10:22,970 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 00:10:23,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:10:23,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:23,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 00:10:23,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:23,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:23,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:23,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:23,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:23,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:23,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187766468] [2021-05-06 00:10:23,275 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:23,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091272865] [2021-05-06 00:10:23,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091272865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:23,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:23,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 00:10:23,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286227390] [2021-05-06 00:10:23,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 00:10:23,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:23,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 00:10:23,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-05-06 00:10:23,277 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:23,411 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-06 00:10:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 00:10:23,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-06 00:10:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:23,412 INFO L225 Difference]: With dead ends: 30 [2021-05-06 00:10:23,412 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 00:10:23,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-05-06 00:10:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 00:10:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 00:10:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-06 00:10:23,414 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-05-06 00:10:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:23,414 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-06 00:10:23,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-06 00:10:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 00:10:23,414 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:23,414 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:23,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:23,621 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:23,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:23,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1214569899, now seen corresponding path program 15 times [2021-05-06 00:10:23,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:23,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866032445] [2021-05-06 00:10:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:23,628 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:23,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964519558] [2021-05-06 00:10:23,628 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 00:10:23,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-06 00:10:23,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:23,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-06 00:10:23,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:23,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:23,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:23,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:23,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:23,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:23,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866032445] [2021-05-06 00:10:23,953 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:23,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964519558] [2021-05-06 00:10:23,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964519558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:23,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:23,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 00:10:23,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713719110] [2021-05-06 00:10:23,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 00:10:23,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:23,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 00:10:23,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-05-06 00:10:23,957 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:24,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:24,124 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-06 00:10:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 00:10:24,124 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-06 00:10:24,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:24,125 INFO L225 Difference]: With dead ends: 31 [2021-05-06 00:10:24,125 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 00:10:24,125 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2021-05-06 00:10:24,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 00:10:24,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 00:10:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-06 00:10:24,129 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2021-05-06 00:10:24,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:24,129 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-06 00:10:24,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:24,130 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-06 00:10:24,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 00:10:24,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:24,130 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:24,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:24,345 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:24,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:24,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1003101263, now seen corresponding path program 16 times [2021-05-06 00:10:24,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:24,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558710805] [2021-05-06 00:10:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:24,357 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:24,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740456823] [2021-05-06 00:10:24,357 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 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 00:10:24,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:10:24,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:24,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 00:10:24,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:24,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:24,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:24,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:24,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:24,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:24,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558710805] [2021-05-06 00:10:24,689 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:24,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740456823] [2021-05-06 00:10:24,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740456823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:24,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:24,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 00:10:24,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005828463] [2021-05-06 00:10:24,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 00:10:24,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:24,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 00:10:24,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-05-06 00:10:24,690 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:24,904 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-06 00:10:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 00:10:24,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-06 00:10:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:24,904 INFO L225 Difference]: With dead ends: 32 [2021-05-06 00:10:24,905 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 00:10:24,905 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2021-05-06 00:10:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 00:10:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 00:10:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-06 00:10:24,907 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2021-05-06 00:10:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:24,907 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-06 00:10:24,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:24,907 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-06 00:10:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 00:10:24,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:24,908 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:25,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 00:10:25,108 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:25,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:25,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1031430549, now seen corresponding path program 17 times [2021-05-06 00:10:25,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:25,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069849725] [2021-05-06 00:10:25,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:25,116 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:25,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699678355] [2021-05-06 00:10:25,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:10:25,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-06 00:10:25,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:25,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-06 00:10:25,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:25,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:25,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:25,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:25,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:25,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:25,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069849725] [2021-05-06 00:10:25,488 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:25,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699678355] [2021-05-06 00:10:25,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699678355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:25,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:25,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-06 00:10:25,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306106692] [2021-05-06 00:10:25,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 00:10:25,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:25,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 00:10:25,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-05-06 00:10:25,492 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:25,682 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-05-06 00:10:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 00:10:25,683 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-06 00:10:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:25,683 INFO L225 Difference]: With dead ends: 33 [2021-05-06 00:10:25,683 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 00:10:25,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2021-05-06 00:10:25,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 00:10:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 00:10:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-05-06 00:10:25,685 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2021-05-06 00:10:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:25,686 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-05-06 00:10:25,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-05-06 00:10:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 00:10:25,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:25,686 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:25,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-06 00:10:25,895 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:25,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:25,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1909638415, now seen corresponding path program 18 times [2021-05-06 00:10:25,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:25,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544751780] [2021-05-06 00:10:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:25,903 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:25,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676843942] [2021-05-06 00:10:25,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:10:25,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-06 00:10:25,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:25,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-06 00:10:25,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:26,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:26,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:26,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:26,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:26,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:26,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544751780] [2021-05-06 00:10:26,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:26,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676843942] [2021-05-06 00:10:26,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676843942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:26,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:26,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 00:10:26,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756024407] [2021-05-06 00:10:26,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 00:10:26,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:26,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 00:10:26,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-05-06 00:10:26,312 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:26,534 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-06 00:10:26,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 00:10:26,534 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-06 00:10:26,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:26,534 INFO L225 Difference]: With dead ends: 34 [2021-05-06 00:10:26,534 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 00:10:26,535 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2021-05-06 00:10:26,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 00:10:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 00:10:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-06 00:10:26,537 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-05-06 00:10:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:26,537 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-06 00:10:26,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-06 00:10:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 00:10:26,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:26,537 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:26,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:26,745 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:26,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:26,745 INFO L82 PathProgramCache]: Analyzing trace with hash 930688811, now seen corresponding path program 19 times [2021-05-06 00:10:26,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:26,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668533980] [2021-05-06 00:10:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:26,751 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:26,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158804170] [2021-05-06 00:10:26,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:10:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:10:26,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 00:10:26,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:27,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:27,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:27,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:27,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:27,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:27,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668533980] [2021-05-06 00:10:27,110 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:27,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158804170] [2021-05-06 00:10:27,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158804170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:27,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:27,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 00:10:27,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044627432] [2021-05-06 00:10:27,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 00:10:27,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:27,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 00:10:27,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-05-06 00:10:27,112 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:27,361 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-05-06 00:10:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 00:10:27,361 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-06 00:10:27,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:27,362 INFO L225 Difference]: With dead ends: 35 [2021-05-06 00:10:27,362 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 00:10:27,362 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2021-05-06 00:10:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 00:10:27,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 00:10:27,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:27,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-05-06 00:10:27,365 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2021-05-06 00:10:27,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:27,366 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-05-06 00:10:27,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:27,366 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-05-06 00:10:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 00:10:27,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:27,366 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:27,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-06 00:10:27,574 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:27,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:27,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1213480399, now seen corresponding path program 20 times [2021-05-06 00:10:27,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:27,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714243045] [2021-05-06 00:10:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:27,595 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:27,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582188074] [2021-05-06 00:10:27,595 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 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 00:10:27,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:10:27,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:27,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 88 conjunts are in the unsatisfiable core [2021-05-06 00:10:27,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:27,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:27,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:27,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:27,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:27,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:27,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714243045] [2021-05-06 00:10:27,971 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:27,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582188074] [2021-05-06 00:10:27,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582188074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:27,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:27,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-06 00:10:27,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934756308] [2021-05-06 00:10:27,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 00:10:27,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:27,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 00:10:27,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-05-06 00:10:27,972 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:28,205 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-06 00:10:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 00:10:28,205 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-06 00:10:28,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:28,206 INFO L225 Difference]: With dead ends: 36 [2021-05-06 00:10:28,206 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 00:10:28,206 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 265.2ms TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2021-05-06 00:10:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 00:10:28,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 00:10:28,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:28,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-06 00:10:28,208 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-05-06 00:10:28,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:28,208 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-06 00:10:28,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-06 00:10:28,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 00:10:28,209 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:28,209 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:28,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-06 00:10:28,409 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:28,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:28,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1036750827, now seen corresponding path program 21 times [2021-05-06 00:10:28,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:28,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112101366] [2021-05-06 00:10:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:28,416 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:28,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342166697] [2021-05-06 00:10:28,416 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 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 00:10:28,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-06 00:10:28,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:28,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 93 conjunts are in the unsatisfiable core [2021-05-06 00:10:28,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:28,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:28,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:28,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:28,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:28,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:28,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112101366] [2021-05-06 00:10:28,893 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:28,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342166697] [2021-05-06 00:10:28,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342166697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:28,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:28,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-06 00:10:28,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538523646] [2021-05-06 00:10:28,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 00:10:28,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:28,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 00:10:28,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-06 00:10:28,894 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:29,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:29,185 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-05-06 00:10:29,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 00:10:29,185 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-06 00:10:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:29,186 INFO L225 Difference]: With dead ends: 37 [2021-05-06 00:10:29,186 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 00:10:29,187 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 346.1ms TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-05-06 00:10:29,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 00:10:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 00:10:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-05-06 00:10:29,189 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2021-05-06 00:10:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:29,189 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-05-06 00:10:29,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-05-06 00:10:29,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 00:10:29,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:29,190 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:29,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:29,397 INFO L428 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:29,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2074442097, now seen corresponding path program 22 times [2021-05-06 00:10:29,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:29,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492299256] [2021-05-06 00:10:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:29,403 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:29,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062139794] [2021-05-06 00:10:29,403 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:29,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:10:29,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-06 00:10:29,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:29,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:29,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:29,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:29,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:29,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:29,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492299256] [2021-05-06 00:10:29,854 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:29,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062139794] [2021-05-06 00:10:29,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062139794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:29,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:29,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-06 00:10:29,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083726744] [2021-05-06 00:10:29,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 00:10:29,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:29,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 00:10:29,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-05-06 00:10:29,855 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:30,142 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-06 00:10:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 00:10:30,142 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-06 00:10:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:30,143 INFO L225 Difference]: With dead ends: 38 [2021-05-06 00:10:30,143 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 00:10:30,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 330.6ms TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2021-05-06 00:10:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 00:10:30,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 00:10:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:30,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-06 00:10:30,146 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2021-05-06 00:10:30,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:30,146 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-06 00:10:30,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-06 00:10:30,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 00:10:30,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:30,147 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:30,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-06 00:10:30,357 INFO L428 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:30,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:30,357 INFO L82 PathProgramCache]: Analyzing trace with hash -116866901, now seen corresponding path program 23 times [2021-05-06 00:10:30,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:30,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829915314] [2021-05-06 00:10:30,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:30,363 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:30,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671101178] [2021-05-06 00:10:30,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:30,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-06 00:10:30,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:30,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 100 conjunts are in the unsatisfiable core [2021-05-06 00:10:30,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:30,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:30,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:30,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:30,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:30,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:30,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829915314] [2021-05-06 00:10:30,854 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:30,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671101178] [2021-05-06 00:10:30,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671101178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:30,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:30,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-06 00:10:30,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251314946] [2021-05-06 00:10:30,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-06 00:10:30,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:30,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-06 00:10:30,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-05-06 00:10:30,856 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:31,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:31,159 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-06 00:10:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 00:10:31,160 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-06 00:10:31,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:31,160 INFO L225 Difference]: With dead ends: 39 [2021-05-06 00:10:31,160 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 00:10:31,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 381.4ms TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2021-05-06 00:10:31,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 00:10:31,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 00:10:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-05-06 00:10:31,162 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-05-06 00:10:31,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:31,163 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-05-06 00:10:31,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:31,163 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-05-06 00:10:31,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 00:10:31,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:31,163 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:31,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:31,364 INFO L428 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:31,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:31,364 INFO L82 PathProgramCache]: Analyzing trace with hash 672030897, now seen corresponding path program 24 times [2021-05-06 00:10:31,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:31,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605374573] [2021-05-06 00:10:31,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:31,370 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:31,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209349225] [2021-05-06 00:10:31,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:31,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 00:10:31,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:31,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 104 conjunts are in the unsatisfiable core [2021-05-06 00:10:31,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:31,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:31,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:31,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:31,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:31,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:31,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605374573] [2021-05-06 00:10:31,889 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:31,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209349225] [2021-05-06 00:10:31,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209349225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:31,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:31,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-06 00:10:31,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138111628] [2021-05-06 00:10:31,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 00:10:31,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:31,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 00:10:31,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-05-06 00:10:31,890 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:32,217 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-06 00:10:32,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 00:10:32,218 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-06 00:10:32,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:32,218 INFO L225 Difference]: With dead ends: 40 [2021-05-06 00:10:32,218 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 00:10:32,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 378.5ms TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2021-05-06 00:10:32,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 00:10:32,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 00:10:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:32,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-06 00:10:32,222 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2021-05-06 00:10:32,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:32,222 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-06 00:10:32,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-06 00:10:32,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 00:10:32,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:32,222 INFO L523 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:32,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-05-06 00:10:32,433 INFO L428 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:32,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:32,433 INFO L82 PathProgramCache]: Analyzing trace with hash -641941141, now seen corresponding path program 25 times [2021-05-06 00:10:32,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:32,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638623036] [2021-05-06 00:10:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:32,439 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:32,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372767424] [2021-05-06 00:10:32,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:10:32,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 108 conjunts are in the unsatisfiable core [2021-05-06 00:10:32,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:32,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:32,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:32,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:32,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:32,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:32,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638623036] [2021-05-06 00:10:32,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:32,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372767424] [2021-05-06 00:10:32,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372767424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:32,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:32,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-05-06 00:10:32,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029796878] [2021-05-06 00:10:32,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 00:10:32,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:32,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 00:10:32,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-05-06 00:10:32,942 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:33,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:33,282 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-05-06 00:10:33,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 00:10:33,282 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-06 00:10:33,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:33,283 INFO L225 Difference]: With dead ends: 41 [2021-05-06 00:10:33,283 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 00:10:33,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 394.8ms TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2021-05-06 00:10:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 00:10:33,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 00:10:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-05-06 00:10:33,286 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2021-05-06 00:10:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:33,286 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-05-06 00:10:33,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:33,287 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-05-06 00:10:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 00:10:33,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:33,287 INFO L523 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:33,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:33,493 INFO L428 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:33,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:33,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1574598641, now seen corresponding path program 26 times [2021-05-06 00:10:33,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:33,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716631605] [2021-05-06 00:10:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:33,500 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:33,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612189448] [2021-05-06 00:10:33,501 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:33,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:10:33,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:33,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 112 conjunts are in the unsatisfiable core [2021-05-06 00:10:33,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:34,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:34,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:34,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:34,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:34,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:34,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716631605] [2021-05-06 00:10:34,106 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:34,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612189448] [2021-05-06 00:10:34,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612189448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:34,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:34,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-06 00:10:34,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252439677] [2021-05-06 00:10:34,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 00:10:34,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:34,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 00:10:34,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2021-05-06 00:10:34,108 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:34,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:34,523 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-06 00:10:34,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 00:10:34,524 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-06 00:10:34,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:34,525 INFO L225 Difference]: With dead ends: 42 [2021-05-06 00:10:34,525 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 00:10:34,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 483.5ms TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2021-05-06 00:10:34,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 00:10:34,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 00:10:34,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-06 00:10:34,528 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2021-05-06 00:10:34,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:34,528 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-06 00:10:34,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:34,529 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-06 00:10:34,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 00:10:34,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:34,529 INFO L523 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:34,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-06 00:10:34,730 INFO L428 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:34,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:34,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1567855147, now seen corresponding path program 27 times [2021-05-06 00:10:34,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:34,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918390508] [2021-05-06 00:10:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:34,735 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:34,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659667756] [2021-05-06 00:10:34,735 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:34,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-06 00:10:34,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:34,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 117 conjunts are in the unsatisfiable core [2021-05-06 00:10:34,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:35,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:35,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:35,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:35,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:35,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:35,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918390508] [2021-05-06 00:10:35,367 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:35,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659667756] [2021-05-06 00:10:35,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659667756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:35,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:35,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-05-06 00:10:35,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744821674] [2021-05-06 00:10:35,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 00:10:35,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:35,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 00:10:35,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-05-06 00:10:35,368 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 32 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:35,842 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-05-06 00:10:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 00:10:35,843 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-06 00:10:35,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:35,844 INFO L225 Difference]: With dead ends: 43 [2021-05-06 00:10:35,844 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 00:10:35,844 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 492.2ms TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 00:10:35,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 00:10:35,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-06 00:10:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:35,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-05-06 00:10:35,846 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2021-05-06 00:10:35,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:35,846 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-05-06 00:10:35,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:35,847 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-05-06 00:10:35,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 00:10:35,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:35,847 INFO L523 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:36,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-06 00:10:36,049 INFO L428 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:36,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:36,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1358806833, now seen corresponding path program 28 times [2021-05-06 00:10:36,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:36,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311877385] [2021-05-06 00:10:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:36,056 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:36,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164943963] [2021-05-06 00:10:36,056 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:36,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:10:36,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:36,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 120 conjunts are in the unsatisfiable core [2021-05-06 00:10:36,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:36,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:36,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:36,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:36,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:36,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:36,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311877385] [2021-05-06 00:10:36,725 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:36,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164943963] [2021-05-06 00:10:36,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164943963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:36,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:36,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-05-06 00:10:36,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785222306] [2021-05-06 00:10:36,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 00:10:36,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:36,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 00:10:36,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2021-05-06 00:10:36,726 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:37,185 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-06 00:10:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 00:10:37,185 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-06 00:10:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:37,186 INFO L225 Difference]: With dead ends: 44 [2021-05-06 00:10:37,186 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 00:10:37,186 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 485.5ms TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 00:10:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 00:10:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 00:10:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-06 00:10:37,189 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2021-05-06 00:10:37,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:37,190 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-06 00:10:37,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:37,190 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-06 00:10:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 00:10:37,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:37,190 INFO L523 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:37,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:37,409 INFO L428 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:37,409 INFO L82 PathProgramCache]: Analyzing trace with hash -826723605, now seen corresponding path program 29 times [2021-05-06 00:10:37,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:37,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328926619] [2021-05-06 00:10:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:37,415 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:37,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11900585] [2021-05-06 00:10:37,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:37,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-06 00:10:37,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:37,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 124 conjunts are in the unsatisfiable core [2021-05-06 00:10:37,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:38,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:38,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:38,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:38,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:38,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:38,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328926619] [2021-05-06 00:10:38,083 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:38,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11900585] [2021-05-06 00:10:38,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11900585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:38,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:38,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-05-06 00:10:38,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275768213] [2021-05-06 00:10:38,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 00:10:38,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:38,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 00:10:38,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 00:10:38,084 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:38,535 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-06 00:10:38,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-06 00:10:38,536 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-06 00:10:38,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:38,536 INFO L225 Difference]: With dead ends: 45 [2021-05-06 00:10:38,536 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 00:10:38,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 538.8ms TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 00:10:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 00:10:38,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 00:10:38,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-05-06 00:10:38,539 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2021-05-06 00:10:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:38,539 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-05-06 00:10:38,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:38,539 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-05-06 00:10:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 00:10:38,540 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:38,540 INFO L523 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:38,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:38,740 INFO L428 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:38,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:38,741 INFO L82 PathProgramCache]: Analyzing trace with hash 141309553, now seen corresponding path program 30 times [2021-05-06 00:10:38,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:38,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658195467] [2021-05-06 00:10:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:38,748 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:38,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221504646] [2021-05-06 00:10:38,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:38,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-06 00:10:38,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:38,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 128 conjunts are in the unsatisfiable core [2021-05-06 00:10:38,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:39,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:39,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:39,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:39,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:39,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:39,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658195467] [2021-05-06 00:10:39,473 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:39,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221504646] [2021-05-06 00:10:39,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221504646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:39,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:39,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-05-06 00:10:39,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648043466] [2021-05-06 00:10:39,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 00:10:39,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:39,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 00:10:39,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 00:10:39,474 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:39,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:39,971 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-06 00:10:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 00:10:39,971 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-06 00:10:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:39,971 INFO L225 Difference]: With dead ends: 46 [2021-05-06 00:10:39,971 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 00:10:39,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 544.4ms TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 00:10:39,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 00:10:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 00:10:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-06 00:10:39,974 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2021-05-06 00:10:39,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:39,974 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-06 00:10:39,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-06 00:10:39,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 00:10:39,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:39,974 INFO L523 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:40,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-06 00:10:40,189 INFO L428 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:40,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:40,189 INFO L82 PathProgramCache]: Analyzing trace with hash 85566379, now seen corresponding path program 31 times [2021-05-06 00:10:40,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:40,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336509509] [2021-05-06 00:10:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:40,195 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:40,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104707063] [2021-05-06 00:10:40,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:10:40,261 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 132 conjunts are in the unsatisfiable core [2021-05-06 00:10:40,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:40,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:40,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:40,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:40,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:40,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:40,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336509509] [2021-05-06 00:10:40,862 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:40,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104707063] [2021-05-06 00:10:40,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104707063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:40,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:40,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-05-06 00:10:40,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080414934] [2021-05-06 00:10:40,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-06 00:10:40,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:40,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-06 00:10:40,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 00:10:40,863 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:41,388 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-05-06 00:10:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-06 00:10:41,389 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-06 00:10:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:41,389 INFO L225 Difference]: With dead ends: 47 [2021-05-06 00:10:41,389 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 00:10:41,390 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 535.4ms TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 00:10:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 00:10:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 00:10:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-05-06 00:10:41,392 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2021-05-06 00:10:41,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:41,392 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-05-06 00:10:41,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:41,392 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-05-06 00:10:41,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 00:10:41,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:41,392 INFO L523 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:41,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-05-06 00:10:41,593 INFO L428 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:41,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1642472015, now seen corresponding path program 32 times [2021-05-06 00:10:41,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:41,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396335221] [2021-05-06 00:10:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:41,599 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:41,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056626844] [2021-05-06 00:10:41,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:41,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:10:41,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:41,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 136 conjunts are in the unsatisfiable core [2021-05-06 00:10:41,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:42,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:42,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:42,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:42,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:42,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:42,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396335221] [2021-05-06 00:10:42,332 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:42,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056626844] [2021-05-06 00:10:42,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056626844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:42,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:42,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-06 00:10:42,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22038638] [2021-05-06 00:10:42,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-06 00:10:42,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:42,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-06 00:10:42,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 00:10:42,333 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:42,903 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-06 00:10:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 00:10:42,903 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-06 00:10:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:42,904 INFO L225 Difference]: With dead ends: 48 [2021-05-06 00:10:42,904 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 00:10:42,904 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 00:10:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 00:10:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 00:10:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 00:10:42,907 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2021-05-06 00:10:42,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:42,907 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 00:10:42,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 00:10:42,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 00:10:42,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:42,907 INFO L523 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:43,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:43,117 INFO L428 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:43,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:43,117 INFO L82 PathProgramCache]: Analyzing trace with hash 622912619, now seen corresponding path program 33 times [2021-05-06 00:10:43,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:43,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004375271] [2021-05-06 00:10:43,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:43,125 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:43,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180696585] [2021-05-06 00:10:43,125 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:43,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-06 00:10:43,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:43,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 140 conjunts are in the unsatisfiable core [2021-05-06 00:10:43,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:43,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:43,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:43,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:43,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:43,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:43,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004375271] [2021-05-06 00:10:43,922 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:43,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180696585] [2021-05-06 00:10:43,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180696585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:43,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:43,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-05-06 00:10:43,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491199210] [2021-05-06 00:10:43,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-06 00:10:43,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:43,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-06 00:10:43,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 00:10:43,923 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:44,504 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-05-06 00:10:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-06 00:10:44,504 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-06 00:10:44,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:44,504 INFO L225 Difference]: With dead ends: 49 [2021-05-06 00:10:44,505 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 00:10:44,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 621.0ms TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 00:10:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 00:10:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 00:10:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:44,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-05-06 00:10:44,507 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2021-05-06 00:10:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:44,507 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-05-06 00:10:44,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-05-06 00:10:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 00:10:44,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:44,508 INFO L523 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:44,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-05-06 00:10:44,708 INFO L428 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2130359537, now seen corresponding path program 34 times [2021-05-06 00:10:44,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:44,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493575144] [2021-05-06 00:10:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:44,714 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:44,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546427301] [2021-05-06 00:10:44,714 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:44,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:10:44,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:44,774 WARN L261 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 144 conjunts are in the unsatisfiable core [2021-05-06 00:10:44,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:45,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:45,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:45,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:45,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:45,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:45,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493575144] [2021-05-06 00:10:45,509 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:45,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546427301] [2021-05-06 00:10:45,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546427301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:45,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:45,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-05-06 00:10:45,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151349380] [2021-05-06 00:10:45,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-06 00:10:45,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:45,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-06 00:10:45,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 00:10:45,511 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:46,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:46,167 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-06 00:10:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 00:10:46,167 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-06 00:10:46,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:46,168 INFO L225 Difference]: With dead ends: 50 [2021-05-06 00:10:46,168 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 00:10:46,168 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 674.6ms TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 00:10:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 00:10:46,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 00:10:46,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:46,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-06 00:10:46,171 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2021-05-06 00:10:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:46,171 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-06 00:10:46,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-06 00:10:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 00:10:46,171 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:46,171 INFO L523 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:46,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-06 00:10:46,381 INFO L428 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1616573739, now seen corresponding path program 35 times [2021-05-06 00:10:46,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:46,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828933353] [2021-05-06 00:10:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:46,388 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:46,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033818119] [2021-05-06 00:10:46,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:46,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-05-06 00:10:46,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:46,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 148 conjunts are in the unsatisfiable core [2021-05-06 00:10:46,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:47,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:47,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:47,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:47,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:47,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:47,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828933353] [2021-05-06 00:10:47,238 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:47,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033818119] [2021-05-06 00:10:47,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033818119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:47,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:47,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-05-06 00:10:47,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836216392] [2021-05-06 00:10:47,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-06 00:10:47,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:47,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-06 00:10:47,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 00:10:47,239 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:47,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:47,990 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-05-06 00:10:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-06 00:10:47,990 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-06 00:10:47,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:47,991 INFO L225 Difference]: With dead ends: 51 [2021-05-06 00:10:47,991 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 00:10:47,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 711.1ms TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 00:10:47,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 00:10:47,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 00:10:47,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:47,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-05-06 00:10:47,994 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2021-05-06 00:10:47,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:47,994 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-05-06 00:10:47,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:47,994 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-05-06 00:10:47,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 00:10:47,994 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:47,994 INFO L523 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:48,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-06 00:10:48,209 INFO L428 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:48,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1425884111, now seen corresponding path program 36 times [2021-05-06 00:10:48,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:48,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726108541] [2021-05-06 00:10:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:48,214 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:48,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50015187] [2021-05-06 00:10:48,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:48,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-06 00:10:48,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:48,298 WARN L261 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 152 conjunts are in the unsatisfiable core [2021-05-06 00:10:48,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:49,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:49,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:49,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:49,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:49,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:49,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726108541] [2021-05-06 00:10:49,192 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:49,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50015187] [2021-05-06 00:10:49,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50015187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:49,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:49,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-05-06 00:10:49,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645555561] [2021-05-06 00:10:49,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-06 00:10:49,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:49,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-06 00:10:49,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 00:10:49,194 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:49,945 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-06 00:10:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 00:10:49,945 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-06 00:10:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:49,946 INFO L225 Difference]: With dead ends: 52 [2021-05-06 00:10:49,946 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 00:10:49,946 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 823.6ms TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 00:10:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 00:10:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 00:10:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-06 00:10:49,949 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2021-05-06 00:10:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:49,949 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-06 00:10:49,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-06 00:10:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 00:10:49,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:49,949 INFO L523 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:50,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-06 00:10:50,161 INFO L428 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:50,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:50,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1252796949, now seen corresponding path program 37 times [2021-05-06 00:10:50,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:50,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167873395] [2021-05-06 00:10:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:50,168 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:50,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855507072] [2021-05-06 00:10:50,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:10:50,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 156 conjunts are in the unsatisfiable core [2021-05-06 00:10:50,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:50,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:50,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:50,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:50,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:51,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:51,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167873395] [2021-05-06 00:10:51,034 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:51,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855507072] [2021-05-06 00:10:51,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855507072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:51,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:51,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-05-06 00:10:51,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486131613] [2021-05-06 00:10:51,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-06 00:10:51,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:51,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-06 00:10:51,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 00:10:51,035 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:51,762 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-05-06 00:10:51,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-06 00:10:51,762 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-06 00:10:51,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:51,763 INFO L225 Difference]: With dead ends: 53 [2021-05-06 00:10:51,763 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 00:10:51,763 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 747.0ms TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 00:10:51,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 00:10:51,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-06 00:10:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-05-06 00:10:51,766 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2021-05-06 00:10:51,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:51,766 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-05-06 00:10:51,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:51,766 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-05-06 00:10:51,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 00:10:51,766 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:51,766 INFO L523 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:51,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:51,981 INFO L428 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:51,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:51,981 INFO L82 PathProgramCache]: Analyzing trace with hash -182062223, now seen corresponding path program 38 times [2021-05-06 00:10:51,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:51,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447464224] [2021-05-06 00:10:51,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:51,994 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:51,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121323526] [2021-05-06 00:10:51,994 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:52,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:10:52,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:52,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 160 conjunts are in the unsatisfiable core [2021-05-06 00:10:52,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:52,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:52,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:52,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:52,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:52,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:52,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447464224] [2021-05-06 00:10:52,913 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:52,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121323526] [2021-05-06 00:10:52,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121323526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:52,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:52,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-05-06 00:10:52,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137418538] [2021-05-06 00:10:52,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-06 00:10:52,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:52,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-06 00:10:52,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 00:10:52,914 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:53,717 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-06 00:10:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 00:10:53,718 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-06 00:10:53,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:53,718 INFO L225 Difference]: With dead ends: 54 [2021-05-06 00:10:53,718 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 00:10:53,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 795.3ms TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 00:10:53,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 00:10:53,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-06 00:10:53,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:53,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-06 00:10:53,724 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2021-05-06 00:10:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:53,724 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-06 00:10:53,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-06 00:10:53,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 00:10:53,724 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:53,724 INFO L523 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:53,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-06 00:10:53,925 INFO L428 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:53,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1349024085, now seen corresponding path program 39 times [2021-05-06 00:10:53,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:53,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885687062] [2021-05-06 00:10:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:53,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:53,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153795330] [2021-05-06 00:10:53,931 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:54,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-05-06 00:10:54,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:54,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 164 conjunts are in the unsatisfiable core [2021-05-06 00:10:54,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:54,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:54,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:54,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:54,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:54,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:54,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885687062] [2021-05-06 00:10:54,901 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:54,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153795330] [2021-05-06 00:10:54,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153795330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:54,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:54,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-05-06 00:10:54,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078519427] [2021-05-06 00:10:54,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-06 00:10:54,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:54,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-06 00:10:54,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 00:10:54,902 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:55,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:55,783 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-05-06 00:10:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-06 00:10:55,783 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-06 00:10:55,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:55,783 INFO L225 Difference]: With dead ends: 55 [2021-05-06 00:10:55,784 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 00:10:55,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 817.8ms TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 00:10:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 00:10:55,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 00:10:55,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:55,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-05-06 00:10:55,787 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2021-05-06 00:10:55,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:55,787 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-05-06 00:10:55,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:55,787 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-05-06 00:10:55,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 00:10:55,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:55,787 INFO L523 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:56,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:56,004 INFO L428 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1129863857, now seen corresponding path program 40 times [2021-05-06 00:10:56,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:56,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532733348] [2021-05-06 00:10:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:56,010 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:56,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390431092] [2021-05-06 00:10:56,010 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:56,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:10:56,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:56,107 WARN L261 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 168 conjunts are in the unsatisfiable core [2021-05-06 00:10:56,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:57,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:57,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:57,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:57,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:57,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:57,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532733348] [2021-05-06 00:10:57,069 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:57,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390431092] [2021-05-06 00:10:57,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390431092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:57,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:57,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-05-06 00:10:57,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507158267] [2021-05-06 00:10:57,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-06 00:10:57,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:57,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-06 00:10:57,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 00:10:57,070 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:57,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:10:57,982 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-06 00:10:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 00:10:57,983 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-06 00:10:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:10:57,983 INFO L225 Difference]: With dead ends: 56 [2021-05-06 00:10:57,983 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 00:10:57,983 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 887.7ms TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 00:10:57,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 00:10:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-06 00:10:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-06 00:10:57,986 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2021-05-06 00:10:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:10:57,986 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-06 00:10:57,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:10:57,986 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-06 00:10:57,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 00:10:57,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:10:57,987 INFO L523 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:10:58,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-06 00:10:58,201 INFO L428 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:10:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:10:58,201 INFO L82 PathProgramCache]: Analyzing trace with hash 665978731, now seen corresponding path program 41 times [2021-05-06 00:10:58,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:10:58,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47032802] [2021-05-06 00:10:58,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:10:58,206 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:10:58,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583283073] [2021-05-06 00:10:58,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:10:58,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-05-06 00:10:58,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:10:58,285 WARN L261 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 172 conjunts are in the unsatisfiable core [2021-05-06 00:10:58,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:10:59,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:59,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:59,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:59,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:10:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:10:59,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:10:59,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47032802] [2021-05-06 00:10:59,238 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:10:59,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583283073] [2021-05-06 00:10:59,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583283073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:10:59,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:10:59,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-05-06 00:10:59,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130767278] [2021-05-06 00:10:59,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-06 00:10:59,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:10:59,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-06 00:10:59,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 00:10:59,240 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:00,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:00,196 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-05-06 00:11:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-06 00:11:00,197 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-06 00:11:00,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:00,197 INFO L225 Difference]: With dead ends: 57 [2021-05-06 00:11:00,197 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 00:11:00,198 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 885.4ms TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 00:11:00,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 00:11:00,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 00:11:00,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:00,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-05-06 00:11:00,200 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2021-05-06 00:11:00,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:00,200 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-05-06 00:11:00,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-05-06 00:11:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 00:11:00,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:00,201 INFO L523 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:00,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:00,401 INFO L428 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:00,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:00,401 INFO L82 PathProgramCache]: Analyzing trace with hash -829558287, now seen corresponding path program 42 times [2021-05-06 00:11:00,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:00,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755790656] [2021-05-06 00:11:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:00,408 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:00,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392595227] [2021-05-06 00:11:00,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:00,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-05-06 00:11:00,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:00,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 176 conjunts are in the unsatisfiable core [2021-05-06 00:11:00,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:01,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:01,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:01,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:01,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:01,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:01,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755790656] [2021-05-06 00:11:01,482 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:01,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392595227] [2021-05-06 00:11:01,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392595227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:01,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:01,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-05-06 00:11:01,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370646309] [2021-05-06 00:11:01,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-06 00:11:01,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:01,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-06 00:11:01,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 00:11:01,483 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:02,497 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-06 00:11:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 00:11:02,497 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-06 00:11:02,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:02,497 INFO L225 Difference]: With dead ends: 58 [2021-05-06 00:11:02,497 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 00:11:02,498 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 917.5ms TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 00:11:02,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 00:11:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 00:11:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-06 00:11:02,500 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2021-05-06 00:11:02,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:02,501 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-06 00:11:02,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:02,501 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-06 00:11:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 00:11:02,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:02,503 INFO L523 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:02,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-06 00:11:02,713 INFO L428 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash 53434411, now seen corresponding path program 43 times [2021-05-06 00:11:02,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:02,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620766002] [2021-05-06 00:11:02,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:02,718 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:02,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960332007] [2021-05-06 00:11:02,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:11:02,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 180 conjunts are in the unsatisfiable core [2021-05-06 00:11:02,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:03,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:03,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:03,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:03,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:03,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:03,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620766002] [2021-05-06 00:11:03,812 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:03,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960332007] [2021-05-06 00:11:03,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960332007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:03,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:03,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2021-05-06 00:11:03,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448840022] [2021-05-06 00:11:03,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-06 00:11:03,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:03,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-06 00:11:03,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 00:11:03,813 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:04,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:04,969 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-05-06 00:11:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-06 00:11:04,969 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-06 00:11:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:04,970 INFO L225 Difference]: With dead ends: 59 [2021-05-06 00:11:04,970 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 00:11:04,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 937.5ms TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 00:11:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 00:11:04,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 00:11:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-05-06 00:11:04,973 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2021-05-06 00:11:04,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:04,973 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-05-06 00:11:04,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:04,973 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-05-06 00:11:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 00:11:04,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:04,974 INFO L523 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:05,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-06 00:11:05,190 INFO L428 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:05,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:05,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1656404273, now seen corresponding path program 44 times [2021-05-06 00:11:05,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:05,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138657671] [2021-05-06 00:11:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:05,197 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:05,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407152538] [2021-05-06 00:11:05,197 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:05,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:11:05,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:05,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 184 conjunts are in the unsatisfiable core [2021-05-06 00:11:05,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:06,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:06,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:06,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:06,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:06,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:06,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138657671] [2021-05-06 00:11:06,423 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:06,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407152538] [2021-05-06 00:11:06,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407152538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:06,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:06,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2021-05-06 00:11:06,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234084333] [2021-05-06 00:11:06,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-06 00:11:06,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:06,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-06 00:11:06,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 00:11:06,424 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:07,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:07,708 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-06 00:11:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 00:11:07,708 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-06 00:11:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:07,708 INFO L225 Difference]: With dead ends: 60 [2021-05-06 00:11:07,708 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 00:11:07,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1078.3ms TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 00:11:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 00:11:07,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 00:11:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:07,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-06 00:11:07,712 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2021-05-06 00:11:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:07,712 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-06 00:11:07,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:07,712 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-06 00:11:07,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 00:11:07,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:07,712 INFO L523 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:07,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:07,926 INFO L428 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:07,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:07,927 INFO L82 PathProgramCache]: Analyzing trace with hash -191137557, now seen corresponding path program 45 times [2021-05-06 00:11:07,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:07,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289757946] [2021-05-06 00:11:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:07,934 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:07,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003120848] [2021-05-06 00:11:07,934 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:08,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-05-06 00:11:08,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:08,048 WARN L261 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 188 conjunts are in the unsatisfiable core [2021-05-06 00:11:08,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:09,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:09,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:09,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:09,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:09,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:09,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289757946] [2021-05-06 00:11:09,120 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:09,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003120848] [2021-05-06 00:11:09,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003120848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:09,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:09,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2021-05-06 00:11:09,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387495751] [2021-05-06 00:11:09,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-06 00:11:09,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:09,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-06 00:11:09,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 00:11:09,121 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:10,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:10,320 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-05-06 00:11:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-06 00:11:10,320 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-06 00:11:10,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:10,321 INFO L225 Difference]: With dead ends: 61 [2021-05-06 00:11:10,321 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 00:11:10,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1012.2ms TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 00:11:10,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 00:11:10,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 00:11:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:10,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-05-06 00:11:10,324 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2021-05-06 00:11:10,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:10,324 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-05-06 00:11:10,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:10,324 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-05-06 00:11:10,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-06 00:11:10,324 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:10,324 INFO L523 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:10,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-06 00:11:10,534 INFO L428 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:10,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:10,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1630359439, now seen corresponding path program 46 times [2021-05-06 00:11:10,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:10,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303970656] [2021-05-06 00:11:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:10,546 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:10,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755159877] [2021-05-06 00:11:10,546 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:10,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:11:10,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:10,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 192 conjunts are in the unsatisfiable core [2021-05-06 00:11:10,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:11,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:11,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:11,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:11,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:11,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:11,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303970656] [2021-05-06 00:11:11,764 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:11,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755159877] [2021-05-06 00:11:11,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755159877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:11,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:11,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2021-05-06 00:11:11,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277737136] [2021-05-06 00:11:11,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-06 00:11:11,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:11,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-06 00:11:11,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 00:11:11,765 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:12,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:12,973 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-06 00:11:12,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-06 00:11:12,973 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-06 00:11:12,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:12,974 INFO L225 Difference]: With dead ends: 62 [2021-05-06 00:11:12,974 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 00:11:12,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1057.4ms TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 00:11:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 00:11:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-06 00:11:12,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-06 00:11:12,977 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2021-05-06 00:11:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:12,977 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-06 00:11:12,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-06 00:11:12,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 00:11:12,977 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:12,977 INFO L523 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:13,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-06 00:11:13,178 INFO L428 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:13,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:13,178 INFO L82 PathProgramCache]: Analyzing trace with hash 998402475, now seen corresponding path program 47 times [2021-05-06 00:11:13,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:13,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019279489] [2021-05-06 00:11:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:13,183 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:13,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662363832] [2021-05-06 00:11:13,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:13,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-05-06 00:11:13,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:13,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 196 conjunts are in the unsatisfiable core [2021-05-06 00:11:13,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:14,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:14,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:14,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:14,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:14,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:14,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019279489] [2021-05-06 00:11:14,463 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:14,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662363832] [2021-05-06 00:11:14,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662363832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:14,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:14,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2021-05-06 00:11:14,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286886005] [2021-05-06 00:11:14,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-06 00:11:14,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:14,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-06 00:11:14,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 00:11:14,465 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:15,815 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-05-06 00:11:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-06 00:11:15,816 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-06 00:11:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:15,816 INFO L225 Difference]: With dead ends: 63 [2021-05-06 00:11:15,816 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 00:11:15,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1125.2ms TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 00:11:15,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 00:11:15,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 00:11:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-05-06 00:11:15,819 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2021-05-06 00:11:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:15,820 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-05-06 00:11:15,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-05-06 00:11:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 00:11:15,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:15,820 INFO L523 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:16,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-06 00:11:16,033 INFO L428 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:16,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:16,033 INFO L82 PathProgramCache]: Analyzing trace with hash 885643185, now seen corresponding path program 48 times [2021-05-06 00:11:16,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:16,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378982224] [2021-05-06 00:11:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:16,038 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:16,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51347333] [2021-05-06 00:11:16,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:16,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-06 00:11:16,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:16,127 WARN L261 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 200 conjunts are in the unsatisfiable core [2021-05-06 00:11:16,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:17,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:17,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:17,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:17,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:17,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:17,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378982224] [2021-05-06 00:11:17,371 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:17,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51347333] [2021-05-06 00:11:17,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51347333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:17,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:17,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-05-06 00:11:17,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411778591] [2021-05-06 00:11:17,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-06 00:11:17,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:17,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-06 00:11:17,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 00:11:17,372 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:18,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:18,784 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-06 00:11:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-06 00:11:18,785 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-06 00:11:18,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:18,785 INFO L225 Difference]: With dead ends: 64 [2021-05-06 00:11:18,785 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 00:11:18,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1161.4ms TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 00:11:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 00:11:18,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 00:11:18,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-06 00:11:18,788 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2021-05-06 00:11:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:18,788 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-06 00:11:18,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-06 00:11:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 00:11:18,789 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:18,789 INFO L523 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:18,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:18,998 INFO L428 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:18,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:18,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1685072491, now seen corresponding path program 49 times [2021-05-06 00:11:18,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:18,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875523569] [2021-05-06 00:11:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:19,004 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:19,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190220620] [2021-05-06 00:11:19,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:11:19,078 WARN L261 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 204 conjunts are in the unsatisfiable core [2021-05-06 00:11:19,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:20,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:20,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:20,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:20,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:20,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:20,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875523569] [2021-05-06 00:11:20,434 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:20,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190220620] [2021-05-06 00:11:20,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190220620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:20,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:20,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2021-05-06 00:11:20,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167147539] [2021-05-06 00:11:20,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-06 00:11:20,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:20,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-06 00:11:20,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 00:11:20,436 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:22,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:22,047 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-05-06 00:11:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-06 00:11:22,048 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-06 00:11:22,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:22,048 INFO L225 Difference]: With dead ends: 65 [2021-05-06 00:11:22,048 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 00:11:22,049 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1276.3ms TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 00:11:22,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 00:11:22,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-06 00:11:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:22,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-05-06 00:11:22,051 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2021-05-06 00:11:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:22,052 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-05-06 00:11:22,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-05-06 00:11:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 00:11:22,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:22,052 INFO L523 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:22,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-06 00:11:22,268 INFO L428 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:22,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:22,269 INFO L82 PathProgramCache]: Analyzing trace with hash 697577201, now seen corresponding path program 50 times [2021-05-06 00:11:22,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:22,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872489871] [2021-05-06 00:11:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:22,275 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:22,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681394300] [2021-05-06 00:11:22,275 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:22,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:11:22,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:22,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 208 conjunts are in the unsatisfiable core [2021-05-06 00:11:22,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:23,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:23,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:23,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:23,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:23,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:23,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872489871] [2021-05-06 00:11:23,639 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:23,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681394300] [2021-05-06 00:11:23,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681394300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:23,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:23,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2021-05-06 00:11:23,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705550761] [2021-05-06 00:11:23,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-06 00:11:23,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:23,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-06 00:11:23,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 00:11:23,640 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:25,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:25,283 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-06 00:11:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 00:11:25,283 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-06 00:11:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:25,284 INFO L225 Difference]: With dead ends: 66 [2021-05-06 00:11:25,284 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 00:11:25,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1206.7ms TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 00:11:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 00:11:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 00:11:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-06 00:11:25,287 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2021-05-06 00:11:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:25,288 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-06 00:11:25,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-06 00:11:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 00:11:25,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:25,288 INFO L523 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:25,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-05-06 00:11:25,489 INFO L428 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:25,489 INFO L82 PathProgramCache]: Analyzing trace with hash 149994283, now seen corresponding path program 51 times [2021-05-06 00:11:25,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:25,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103084545] [2021-05-06 00:11:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:25,495 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:25,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664777084] [2021-05-06 00:11:25,495 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:25,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-05-06 00:11:25,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:25,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 213 conjunts are in the unsatisfiable core [2021-05-06 00:11:25,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:27,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:27,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:27,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:27,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:27,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:27,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103084545] [2021-05-06 00:11:27,187 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:27,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664777084] [2021-05-06 00:11:27,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664777084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:27,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:27,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2021-05-06 00:11:27,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599175518] [2021-05-06 00:11:27,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-06 00:11:27,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:27,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-06 00:11:27,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 00:11:27,188 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:29,169 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-05-06 00:11:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 00:11:29,169 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-06 00:11:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:29,170 INFO L225 Difference]: With dead ends: 67 [2021-05-06 00:11:29,170 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 00:11:29,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1513.3ms TimeCoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 00:11:29,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 00:11:29,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 00:11:29,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-05-06 00:11:29,173 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2021-05-06 00:11:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:29,173 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-05-06 00:11:29,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-05-06 00:11:29,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 00:11:29,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:29,174 INFO L523 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:29,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:29,389 INFO L428 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:29,389 INFO L82 PathProgramCache]: Analyzing trace with hash 354793009, now seen corresponding path program 52 times [2021-05-06 00:11:29,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:29,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589487343] [2021-05-06 00:11:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:29,395 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:29,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813279944] [2021-05-06 00:11:29,395 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:29,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:11:29,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:29,475 WARN L261 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 216 conjunts are in the unsatisfiable core [2021-05-06 00:11:29,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:30,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:30,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:30,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:30,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:30,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:30,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589487343] [2021-05-06 00:11:30,887 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:30,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813279944] [2021-05-06 00:11:30,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813279944] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:30,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:30,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2021-05-06 00:11:30,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003190580] [2021-05-06 00:11:30,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-06 00:11:30,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:30,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-06 00:11:30,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 00:11:30,888 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:32,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:32,708 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-06 00:11:32,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 00:11:32,708 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-06 00:11:32,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:32,708 INFO L225 Difference]: With dead ends: 68 [2021-05-06 00:11:32,708 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 00:11:32,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1325.2ms TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 00:11:32,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 00:11:32,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 00:11:32,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:32,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-06 00:11:32,712 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2021-05-06 00:11:32,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:32,712 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-06 00:11:32,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:32,712 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-06 00:11:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 00:11:32,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:32,712 INFO L523 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:32,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-05-06 00:11:32,931 INFO L428 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:32,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1886381077, now seen corresponding path program 53 times [2021-05-06 00:11:32,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:32,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203331234] [2021-05-06 00:11:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:32,938 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:32,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340773636] [2021-05-06 00:11:32,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:33,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-05-06 00:11:33,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:33,037 WARN L261 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 220 conjunts are in the unsatisfiable core [2021-05-06 00:11:33,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:34,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:34,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:34,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:34,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:34,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:34,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203331234] [2021-05-06 00:11:34,573 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:34,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340773636] [2021-05-06 00:11:34,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340773636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:34,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:34,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2021-05-06 00:11:34,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933300035] [2021-05-06 00:11:34,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-06 00:11:34,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:34,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-06 00:11:34,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 00:11:34,574 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:36,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:36,773 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-05-06 00:11:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-06 00:11:36,773 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-06 00:11:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:36,774 INFO L225 Difference]: With dead ends: 69 [2021-05-06 00:11:36,774 INFO L226 Difference]: Without dead ends: 66 [2021-05-06 00:11:36,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1438.0ms TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 00:11:36,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-06 00:11:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-06 00:11:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-05-06 00:11:36,777 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2021-05-06 00:11:36,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:36,777 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-05-06 00:11:36,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-05-06 00:11:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 00:11:36,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:36,778 INFO L523 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:36,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-06 00:11:36,978 INFO L428 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:36,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:36,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1651666289, now seen corresponding path program 54 times [2021-05-06 00:11:36,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:36,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272680532] [2021-05-06 00:11:36,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:36,985 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:36,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887685540] [2021-05-06 00:11:36,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:37,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-05-06 00:11:37,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:37,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 224 conjunts are in the unsatisfiable core [2021-05-06 00:11:37,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:38,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:38,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:38,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:38,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:38,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:38,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272680532] [2021-05-06 00:11:38,783 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:38,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887685540] [2021-05-06 00:11:38,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887685540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:38,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:38,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2021-05-06 00:11:38,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865820632] [2021-05-06 00:11:38,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-06 00:11:38,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:38,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-06 00:11:38,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 00:11:38,784 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:41,040 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-06 00:11:41,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 00:11:41,040 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-06 00:11:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:41,040 INFO L225 Difference]: With dead ends: 70 [2021-05-06 00:11:41,040 INFO L226 Difference]: Without dead ends: 67 [2021-05-06 00:11:41,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1604.8ms TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 00:11:41,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-06 00:11:41,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-06 00:11:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-06 00:11:41,044 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2021-05-06 00:11:41,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:41,044 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-06 00:11:41,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:41,044 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-06 00:11:41,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 00:11:41,044 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:41,044 INFO L523 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:41,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:41,258 INFO L428 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:41,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:41,258 INFO L82 PathProgramCache]: Analyzing trace with hash -338015061, now seen corresponding path program 55 times [2021-05-06 00:11:41,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:41,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199008023] [2021-05-06 00:11:41,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:41,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:41,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192811056] [2021-05-06 00:11:41,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:11:41,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 228 conjunts are in the unsatisfiable core [2021-05-06 00:11:41,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:42,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:42,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:42,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:42,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:42,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:42,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199008023] [2021-05-06 00:11:42,910 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:42,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192811056] [2021-05-06 00:11:42,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192811056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:42,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:42,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2021-05-06 00:11:42,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136606720] [2021-05-06 00:11:42,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-06 00:11:42,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:42,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-06 00:11:42,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 00:11:42,911 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:45,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:45,452 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-05-06 00:11:45,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-06 00:11:45,452 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-06 00:11:45,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:45,453 INFO L225 Difference]: With dead ends: 71 [2021-05-06 00:11:45,453 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 00:11:45,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1486.4ms TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 00:11:45,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 00:11:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-06 00:11:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-05-06 00:11:45,456 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2021-05-06 00:11:45,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:45,456 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-05-06 00:11:45,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-05-06 00:11:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 00:11:45,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:45,457 INFO L523 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:45,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:45,674 INFO L428 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:45,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1888594767, now seen corresponding path program 56 times [2021-05-06 00:11:45,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:45,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966175888] [2021-05-06 00:11:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:45,680 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:45,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191052054] [2021-05-06 00:11:45,680 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:45,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:11:45,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:45,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 232 conjunts are in the unsatisfiable core [2021-05-06 00:11:45,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:47,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:47,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:47,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:47,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:47,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:47,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966175888] [2021-05-06 00:11:47,507 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:47,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191052054] [2021-05-06 00:11:47,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191052054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:47,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:47,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2021-05-06 00:11:47,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451826525] [2021-05-06 00:11:47,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-06 00:11:47,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:47,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-06 00:11:47,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 00:11:47,508 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:49,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:49,990 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-06 00:11:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-06 00:11:49,990 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-06 00:11:49,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:49,991 INFO L225 Difference]: With dead ends: 72 [2021-05-06 00:11:49,991 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 00:11:49,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1630.2ms TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 00:11:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 00:11:49,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-06 00:11:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-06 00:11:49,994 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2021-05-06 00:11:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:49,994 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-06 00:11:49,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-06 00:11:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 00:11:49,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:49,995 INFO L523 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:50,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:50,196 INFO L428 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:50,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1583041899, now seen corresponding path program 57 times [2021-05-06 00:11:50,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:50,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091255232] [2021-05-06 00:11:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:50,201 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:50,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929316533] [2021-05-06 00:11:50,202 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:50,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-05-06 00:11:50,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:50,309 WARN L261 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 237 conjunts are in the unsatisfiable core [2021-05-06 00:11:50,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:52,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:52,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:52,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:52,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:52,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:52,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091255232] [2021-05-06 00:11:52,232 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:52,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929316533] [2021-05-06 00:11:52,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929316533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:52,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:52,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2021-05-06 00:11:52,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428933875] [2021-05-06 00:11:52,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-06 00:11:52,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:52,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-06 00:11:52,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 00:11:52,233 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:55,169 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-05-06 00:11:55,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 00:11:55,169 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-06 00:11:55,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:55,170 INFO L225 Difference]: With dead ends: 73 [2021-05-06 00:11:55,170 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 00:11:55,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1833.0ms TimeCoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 00:11:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 00:11:55,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-06 00:11:55,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-05-06 00:11:55,174 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2021-05-06 00:11:55,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:55,174 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-05-06 00:11:55,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-05-06 00:11:55,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 00:11:55,174 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:55,174 INFO L523 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:55,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-06 00:11:55,377 INFO L428 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:55,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:55,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1829596145, now seen corresponding path program 58 times [2021-05-06 00:11:55,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:55,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671996649] [2021-05-06 00:11:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:55,383 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:55,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303006939] [2021-05-06 00:11:55,383 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:55,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:11:55,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:55,473 WARN L261 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 240 conjunts are in the unsatisfiable core [2021-05-06 00:11:55,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:57,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:57,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:57,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:57,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:57,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:57,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671996649] [2021-05-06 00:11:57,254 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:57,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303006939] [2021-05-06 00:11:57,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303006939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:57,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:57,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2021-05-06 00:11:57,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041135458] [2021-05-06 00:11:57,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-06 00:11:57,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:57,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-06 00:11:57,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 00:11:57,255 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:59,874 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-06 00:11:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 00:11:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-06 00:11:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:59,875 INFO L225 Difference]: With dead ends: 74 [2021-05-06 00:11:59,875 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 00:11:59,875 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1699.5ms TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 00:11:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 00:11:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-06 00:11:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:59,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-06 00:11:59,879 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2021-05-06 00:11:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:59,879 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-06 00:11:59,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-06 00:11:59,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 00:11:59,879 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:59,879 INFO L523 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:00,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:00,093 INFO L428 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:00,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:00,093 INFO L82 PathProgramCache]: Analyzing trace with hash 882843179, now seen corresponding path program 59 times [2021-05-06 00:12:00,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:00,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108283154] [2021-05-06 00:12:00,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:00,101 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:00,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360394862] [2021-05-06 00:12:00,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:00,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-05-06 00:12:00,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:00,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 244 conjunts are in the unsatisfiable core [2021-05-06 00:12:00,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:02,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:02,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:02,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:02,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:02,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:02,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108283154] [2021-05-06 00:12:02,125 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:02,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360394862] [2021-05-06 00:12:02,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360394862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:02,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:02,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2021-05-06 00:12:02,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408095401] [2021-05-06 00:12:02,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-06 00:12:02,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:02,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-06 00:12:02,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 00:12:02,126 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:05,502 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-05-06 00:12:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-06 00:12:05,503 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-06 00:12:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:05,503 INFO L225 Difference]: With dead ends: 75 [2021-05-06 00:12:05,503 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 00:12:05,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1836.7ms TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 00:12:05,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 00:12:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-05-06 00:12:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-05-06 00:12:05,507 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2021-05-06 00:12:05,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:05,507 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-05-06 00:12:05,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:05,507 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-05-06 00:12:05,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 00:12:05,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:05,508 INFO L523 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:05,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:05,721 INFO L428 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:05,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1598272305, now seen corresponding path program 60 times [2021-05-06 00:12:05,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:05,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930381094] [2021-05-06 00:12:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:05,727 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:05,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860228836] [2021-05-06 00:12:05,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:05,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-06 00:12:05,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:05,860 WARN L261 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 248 conjunts are in the unsatisfiable core [2021-05-06 00:12:05,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:07,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:07,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:07,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:07,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:07,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:07,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930381094] [2021-05-06 00:12:07,899 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:07,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860228836] [2021-05-06 00:12:07,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860228836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:07,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:07,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2021-05-06 00:12:07,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325383305] [2021-05-06 00:12:07,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-06 00:12:07,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:07,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-06 00:12:07,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 00:12:07,900 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:11,103 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-06 00:12:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-06 00:12:11,103 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-06 00:12:11,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:11,104 INFO L225 Difference]: With dead ends: 76 [2021-05-06 00:12:11,104 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 00:12:11,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1943.3ms TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 00:12:11,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 00:12:11,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-06 00:12:11,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:11,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-06 00:12:11,107 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2021-05-06 00:12:11,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:11,108 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-06 00:12:11,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:11,108 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-06 00:12:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 00:12:11,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:11,108 INFO L523 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:11,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-06 00:12:11,325 INFO L428 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1993228565, now seen corresponding path program 61 times [2021-05-06 00:12:11,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:11,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548870997] [2021-05-06 00:12:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:11,331 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:11,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972415661] [2021-05-06 00:12:11,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:12:11,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 252 conjunts are in the unsatisfiable core [2021-05-06 00:12:11,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:13,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:13,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:13,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:13,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:13,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:13,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548870997] [2021-05-06 00:12:13,243 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:13,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972415661] [2021-05-06 00:12:13,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972415661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:13,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:13,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2021-05-06 00:12:13,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676442910] [2021-05-06 00:12:13,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-06 00:12:13,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:13,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-06 00:12:13,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 00:12:13,244 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:17,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:17,104 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-05-06 00:12:17,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-06 00:12:17,104 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-06 00:12:17,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:17,105 INFO L225 Difference]: With dead ends: 77 [2021-05-06 00:12:17,105 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 00:12:17,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1738.3ms TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 00:12:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 00:12:17,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 00:12:17,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2021-05-06 00:12:17,108 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2021-05-06 00:12:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:17,109 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2021-05-06 00:12:17,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2021-05-06 00:12:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 00:12:17,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:17,109 INFO L523 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:17,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:17,313 INFO L428 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1660605839, now seen corresponding path program 62 times [2021-05-06 00:12:17,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:17,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945459002] [2021-05-06 00:12:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:17,321 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:17,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797132680] [2021-05-06 00:12:17,321 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:17,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:12:17,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:17,439 WARN L261 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 256 conjunts are in the unsatisfiable core [2021-05-06 00:12:17,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:19,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:19,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:19,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:19,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:19,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:19,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945459002] [2021-05-06 00:12:19,596 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:19,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797132680] [2021-05-06 00:12:19,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797132680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:19,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:19,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2021-05-06 00:12:19,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743937959] [2021-05-06 00:12:19,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-06 00:12:19,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:19,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-06 00:12:19,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 00:12:19,597 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:23,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:23,369 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-06 00:12:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 00:12:23,370 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-06 00:12:23,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:23,370 INFO L225 Difference]: With dead ends: 78 [2021-05-06 00:12:23,370 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 00:12:23,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2047.1ms TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 00:12:23,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 00:12:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 00:12:23,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-06 00:12:23,374 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2021-05-06 00:12:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:23,374 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-06 00:12:23,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:23,374 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-06 00:12:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 00:12:23,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:23,374 INFO L523 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:23,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:23,581 INFO L428 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:23,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:23,581 INFO L82 PathProgramCache]: Analyzing trace with hash 60764075, now seen corresponding path program 63 times [2021-05-06 00:12:23,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:23,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809442962] [2021-05-06 00:12:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:23,587 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:23,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076348910] [2021-05-06 00:12:23,588 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:23,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2021-05-06 00:12:23,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:23,734 WARN L261 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 260 conjunts are in the unsatisfiable core [2021-05-06 00:12:23,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:25,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:25,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:25,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809442962] [2021-05-06 00:12:25,868 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:25,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076348910] [2021-05-06 00:12:25,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076348910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:25,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:25,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2021-05-06 00:12:25,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387902922] [2021-05-06 00:12:25,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-06 00:12:25,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:25,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-06 00:12:25,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 00:12:25,869 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:30,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:30,468 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2021-05-06 00:12:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-06 00:12:30,468 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-06 00:12:30,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:30,469 INFO L225 Difference]: With dead ends: 79 [2021-05-06 00:12:30,469 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 00:12:30,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2049.7ms TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 00:12:30,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 00:12:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 00:12:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2021-05-06 00:12:30,473 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2021-05-06 00:12:30,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:30,473 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2021-05-06 00:12:30,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2021-05-06 00:12:30,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 00:12:30,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:30,473 INFO L523 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:30,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:30,689 INFO L428 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:30,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:30,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1883623857, now seen corresponding path program 64 times [2021-05-06 00:12:30,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:30,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449207858] [2021-05-06 00:12:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:30,695 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:30,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23691373] [2021-05-06 00:12:30,695 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:30,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:12:30,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:30,863 WARN L261 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 264 conjunts are in the unsatisfiable core [2021-05-06 00:12:30,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:32,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:32,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:32,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:32,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:32,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:32,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449207858] [2021-05-06 00:12:32,916 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:32,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23691373] [2021-05-06 00:12:32,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23691373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:32,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:32,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2021-05-06 00:12:32,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702920188] [2021-05-06 00:12:32,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-06 00:12:32,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:32,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-06 00:12:32,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 00:12:32,918 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:38,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:38,014 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-06 00:12:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-06 00:12:38,014 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-06 00:12:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:38,015 INFO L225 Difference]: With dead ends: 80 [2021-05-06 00:12:38,015 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 00:12:38,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1962.1ms TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 00:12:38,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 00:12:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 00:12:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-06 00:12:38,019 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2021-05-06 00:12:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:38,019 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-06 00:12:38,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-06 00:12:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 00:12:38,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:38,020 INFO L523 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:38,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-05-06 00:12:38,237 INFO L428 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:38,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1737265045, now seen corresponding path program 65 times [2021-05-06 00:12:38,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:38,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880379652] [2021-05-06 00:12:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:38,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:38,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55533075] [2021-05-06 00:12:38,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:38,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-05-06 00:12:38,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:38,355 WARN L261 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 268 conjunts are in the unsatisfiable core [2021-05-06 00:12:38,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:40,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:40,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:40,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:40,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:40,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:40,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880379652] [2021-05-06 00:12:40,488 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:40,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55533075] [2021-05-06 00:12:40,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55533075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:40,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:40,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2021-05-06 00:12:40,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591666567] [2021-05-06 00:12:40,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-06 00:12:40,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:40,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-06 00:12:40,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 00:12:40,489 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:44,826 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2021-05-06 00:12:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-06 00:12:44,827 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-06 00:12:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:44,827 INFO L225 Difference]: With dead ends: 81 [2021-05-06 00:12:44,827 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 00:12:44,828 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2030.5ms TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 00:12:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 00:12:44,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 00:12:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-05-06 00:12:44,831 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2021-05-06 00:12:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:44,831 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-05-06 00:12:44,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-05-06 00:12:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 00:12:44,832 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:44,832 INFO L523 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:45,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:45,032 INFO L428 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:45,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1979295985, now seen corresponding path program 66 times [2021-05-06 00:12:45,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:45,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380741859] [2021-05-06 00:12:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:45,038 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:45,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866797281] [2021-05-06 00:12:45,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:45,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2021-05-06 00:12:45,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:45,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 272 conjunts are in the unsatisfiable core [2021-05-06 00:12:45,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:47,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:47,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:47,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:47,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:47,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:47,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380741859] [2021-05-06 00:12:47,604 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:47,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866797281] [2021-05-06 00:12:47,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866797281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:47,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:47,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2021-05-06 00:12:47,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896045398] [2021-05-06 00:12:47,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-06 00:12:47,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:47,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-06 00:12:47,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 00:12:47,605 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:53,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:53,445 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-06 00:12:53,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-06 00:12:53,446 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-06 00:12:53,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:53,447 INFO L225 Difference]: With dead ends: 82 [2021-05-06 00:12:53,447 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 00:12:53,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2362.1ms TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 00:12:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 00:12:53,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-06 00:12:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:53,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-06 00:12:53,452 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2021-05-06 00:12:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:53,452 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-06 00:12:53,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:53,453 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-06 00:12:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 00:12:53,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:53,453 INFO L523 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:53,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:53,654 INFO L428 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:53,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:53,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1228570923, now seen corresponding path program 67 times [2021-05-06 00:12:53,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:53,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549517693] [2021-05-06 00:12:53,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:53,662 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:53,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818250263] [2021-05-06 00:12:53,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:12:53,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 276 conjunts are in the unsatisfiable core [2021-05-06 00:12:53,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:56,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:56,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:56,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:56,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:56,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:56,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549517693] [2021-05-06 00:12:56,234 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:56,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818250263] [2021-05-06 00:12:56,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818250263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:56,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:56,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2021-05-06 00:12:56,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423214446] [2021-05-06 00:12:56,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-06 00:12:56,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:56,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-06 00:12:56,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 00:12:56,235 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:01,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:01,314 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-05-06 00:13:01,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-06 00:13:01,315 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-06 00:13:01,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:01,316 INFO L225 Difference]: With dead ends: 83 [2021-05-06 00:13:01,316 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 00:13:01,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2312.3ms TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 00:13:01,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 00:13:01,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-06 00:13:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2021-05-06 00:13:01,320 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2021-05-06 00:13:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:01,320 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2021-05-06 00:13:01,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:01,321 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2021-05-06 00:13:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 00:13:01,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:01,321 INFO L523 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:01,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-06 00:13:01,537 INFO L428 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:01,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:01,537 INFO L82 PathProgramCache]: Analyzing trace with hash -569069519, now seen corresponding path program 68 times [2021-05-06 00:13:01,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:01,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723676709] [2021-05-06 00:13:01,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:01,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:01,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704838582] [2021-05-06 00:13:01,543 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:01,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:13:01,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:01,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 280 conjunts are in the unsatisfiable core [2021-05-06 00:13:01,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:04,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:04,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:04,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:04,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:04,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:04,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723676709] [2021-05-06 00:13:04,077 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:04,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704838582] [2021-05-06 00:13:04,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704838582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:04,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:04,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2021-05-06 00:13:04,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466436592] [2021-05-06 00:13:04,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-06 00:13:04,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:04,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-06 00:13:04,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 00:13:04,078 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:11,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:11,522 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-06 00:13:11,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-06 00:13:11,523 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-06 00:13:11,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:11,523 INFO L225 Difference]: With dead ends: 84 [2021-05-06 00:13:11,523 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 00:13:11,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2341.3ms TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 00:13:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 00:13:11,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-06 00:13:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-06 00:13:11,527 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2021-05-06 00:13:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:11,527 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-06 00:13:11,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-06 00:13:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 00:13:11,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:11,528 INFO L523 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:11,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-05-06 00:13:11,741 INFO L428 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash -461348373, now seen corresponding path program 69 times [2021-05-06 00:13:11,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:11,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102814981] [2021-05-06 00:13:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:11,749 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:11,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947923911] [2021-05-06 00:13:11,749 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:11,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-05-06 00:13:11,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:11,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 285 conjunts are in the unsatisfiable core [2021-05-06 00:13:11,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:14,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:14,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:14,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:14,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:14,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:14,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102814981] [2021-05-06 00:13:14,554 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:14,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947923911] [2021-05-06 00:13:14,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947923911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:14,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:14,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2021-05-06 00:13:14,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854514223] [2021-05-06 00:13:14,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-06 00:13:14,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:14,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-06 00:13:14,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 00:13:14,555 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:22,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:22,312 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-05-06 00:13:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-06 00:13:22,312 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-06 00:13:22,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:22,313 INFO L225 Difference]: With dead ends: 85 [2021-05-06 00:13:22,313 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 00:13:22,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2588.6ms TimeCoverageRelationStatistics Valid=220, Invalid=5330, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 00:13:22,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 00:13:22,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-06 00:13:22,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:22,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2021-05-06 00:13:22,317 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2021-05-06 00:13:22,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:22,317 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2021-05-06 00:13:22,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:22,317 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2021-05-06 00:13:22,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 00:13:22,317 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:22,317 INFO L523 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:22,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-05-06 00:13:22,518 INFO L428 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:22,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1416960143, now seen corresponding path program 70 times [2021-05-06 00:13:22,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:22,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577126022] [2021-05-06 00:13:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:22,524 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:22,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953300093] [2021-05-06 00:13:22,524 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:22,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:13:22,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:22,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 288 conjunts are in the unsatisfiable core [2021-05-06 00:13:22,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:25,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:25,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:25,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:25,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:25,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:25,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577126022] [2021-05-06 00:13:25,170 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:25,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953300093] [2021-05-06 00:13:25,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953300093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:25,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:25,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2021-05-06 00:13:25,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114258377] [2021-05-06 00:13:25,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-06 00:13:25,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:25,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-06 00:13:25,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 00:13:25,171 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:32,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:32,710 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-06 00:13:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-06 00:13:32,710 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-06 00:13:32,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:32,711 INFO L225 Difference]: With dead ends: 86 [2021-05-06 00:13:32,711 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 00:13:32,711 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2420.7ms TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 00:13:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 00:13:32,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-06 00:13:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-06 00:13:32,715 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2021-05-06 00:13:32,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:32,715 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-06 00:13:32,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:32,715 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-06 00:13:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 00:13:32,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:32,715 INFO L523 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:32,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:32,916 INFO L428 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:32,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:32,917 INFO L82 PathProgramCache]: Analyzing trace with hash -976153941, now seen corresponding path program 71 times [2021-05-06 00:13:32,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:32,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930443431] [2021-05-06 00:13:32,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:32,922 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:32,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692562460] [2021-05-06 00:13:32,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:33,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-05-06 00:13:33,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:33,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 292 conjunts are in the unsatisfiable core [2021-05-06 00:13:33,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:35,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:35,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:35,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:35,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:35,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:35,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930443431] [2021-05-06 00:13:35,774 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:35,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692562460] [2021-05-06 00:13:35,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692562460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:35,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:35,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2021-05-06 00:13:35,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122188303] [2021-05-06 00:13:35,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-06 00:13:35,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:35,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-06 00:13:35,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 00:13:35,775 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:43,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:43,162 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2021-05-06 00:13:43,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-06 00:13:43,163 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-06 00:13:43,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:43,163 INFO L225 Difference]: With dead ends: 87 [2021-05-06 00:13:43,163 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 00:13:43,164 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2637.7ms TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 00:13:43,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 00:13:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-06 00:13:43,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-05-06 00:13:43,168 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2021-05-06 00:13:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:43,168 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-05-06 00:13:43,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:43,168 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-05-06 00:13:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 00:13:43,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:43,168 INFO L523 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:43,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-05-06 00:13:43,385 INFO L428 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:43,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:43,385 INFO L82 PathProgramCache]: Analyzing trace with hash -196063567, now seen corresponding path program 72 times [2021-05-06 00:13:43,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:43,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396728773] [2021-05-06 00:13:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:43,392 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:43,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150545959] [2021-05-06 00:13:43,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:43,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-06 00:13:43,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:43,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 296 conjunts are in the unsatisfiable core [2021-05-06 00:13:43,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:46,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:46,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:46,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:46,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:46,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:46,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396728773] [2021-05-06 00:13:46,237 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:46,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150545959] [2021-05-06 00:13:46,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150545959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:46,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:46,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2021-05-06 00:13:46,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056784053] [2021-05-06 00:13:46,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-06 00:13:46,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:46,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-06 00:13:46,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 00:13:46,238 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:55,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:55,984 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-06 00:13:55,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-06 00:13:55,984 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-06 00:13:55,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:55,984 INFO L225 Difference]: With dead ends: 88 [2021-05-06 00:13:55,984 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 00:13:55,985 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2628.0ms TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 00:13:55,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 00:13:55,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-06 00:13:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-06 00:13:55,989 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2021-05-06 00:13:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:55,989 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-06 00:13:55,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-06 00:13:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 00:13:55,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:55,989 INFO L523 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:56,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:56,193 INFO L428 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:56,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1783065749, now seen corresponding path program 73 times [2021-05-06 00:13:56,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:56,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787885835] [2021-05-06 00:13:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:56,199 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:56,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427344636] [2021-05-06 00:13:56,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:13:56,286 WARN L261 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 300 conjunts are in the unsatisfiable core [2021-05-06 00:13:56,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:59,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:59,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:59,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:59,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:59,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:59,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787885835] [2021-05-06 00:13:59,204 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:59,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427344636] [2021-05-06 00:13:59,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427344636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:59,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:59,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2021-05-06 00:13:59,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759205462] [2021-05-06 00:13:59,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-06 00:13:59,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:59,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-06 00:13:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 00:13:59,205 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:10,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:10,343 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2021-05-06 00:14:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-06 00:14:10,343 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-06 00:14:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:10,344 INFO L225 Difference]: With dead ends: 89 [2021-05-06 00:14:10,344 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 00:14:10,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2814.0ms TimeCoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 00:14:10,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 00:14:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 00:14:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2021-05-06 00:14:10,348 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2021-05-06 00:14:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:10,348 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2021-05-06 00:14:10,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2021-05-06 00:14:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 00:14:10,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:10,349 INFO L523 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:10,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-05-06 00:14:10,563 INFO L428 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:10,564 INFO L82 PathProgramCache]: Analyzing trace with hash 559474161, now seen corresponding path program 74 times [2021-05-06 00:14:10,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:10,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770320522] [2021-05-06 00:14:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:10,569 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:10,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341164879] [2021-05-06 00:14:10,570 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:10,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:14:10,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:10,689 WARN L261 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 304 conjunts are in the unsatisfiable core [2021-05-06 00:14:10,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:13,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:13,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:13,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:13,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:13,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:13,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770320522] [2021-05-06 00:14:13,493 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:13,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341164879] [2021-05-06 00:14:13,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341164879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:13,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:13,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2021-05-06 00:14:13,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375086888] [2021-05-06 00:14:13,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-06 00:14:13,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:13,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-06 00:14:13,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 00:14:13,494 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:25,575 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-06 00:14:25,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-06 00:14:25,576 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-06 00:14:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:25,576 INFO L225 Difference]: With dead ends: 90 [2021-05-06 00:14:25,576 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 00:14:25,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2712.7ms TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 00:14:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 00:14:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-06 00:14:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-06 00:14:25,589 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2021-05-06 00:14:25,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:25,589 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-06 00:14:25,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:25,589 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-06 00:14:25,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 00:14:25,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:25,593 INFO L523 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:25,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:25,799 INFO L428 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:25,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:25,800 INFO L82 PathProgramCache]: Analyzing trace with hash 163767339, now seen corresponding path program 75 times [2021-05-06 00:14:25,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:25,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355631743] [2021-05-06 00:14:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:25,808 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:25,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699713702] [2021-05-06 00:14:25,808 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:25,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-05-06 00:14:25,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:25,935 WARN L261 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 309 conjunts are in the unsatisfiable core [2021-05-06 00:14:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:29,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:29,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:29,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:29,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:29,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:29,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355631743] [2021-05-06 00:14:29,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:29,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699713702] [2021-05-06 00:14:29,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699713702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:29,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:29,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2021-05-06 00:14:29,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638018322] [2021-05-06 00:14:29,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-06 00:14:29,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:29,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-06 00:14:29,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 00:14:29,165 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 80 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:43,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:43,039 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2021-05-06 00:14:43,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-06 00:14:43,040 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-06 00:14:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:43,040 INFO L225 Difference]: With dead ends: 91 [2021-05-06 00:14:43,040 INFO L226 Difference]: Without dead ends: 88 [2021-05-06 00:14:43,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 3114.3ms TimeCoverageRelationStatistics Valid=238, Invalid=6242, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 00:14:43,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-06 00:14:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-06 00:14:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2021-05-06 00:14:43,048 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2021-05-06 00:14:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:43,048 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2021-05-06 00:14:43,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2021-05-06 00:14:43,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 00:14:43,048 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:43,048 INFO L523 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:43,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-05-06 00:14:43,261 INFO L428 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:43,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:43,261 INFO L82 PathProgramCache]: Analyzing trace with hash 781757745, now seen corresponding path program 76 times [2021-05-06 00:14:43,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:43,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716649238] [2021-05-06 00:14:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:43,267 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:43,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563057135] [2021-05-06 00:14:43,267 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:43,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:14:43,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:43,368 WARN L261 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 312 conjunts are in the unsatisfiable core [2021-05-06 00:14:43,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:46,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:46,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:46,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:46,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:46,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:46,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716649238] [2021-05-06 00:14:46,231 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:46,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563057135] [2021-05-06 00:14:46,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563057135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:46,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:46,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2021-05-06 00:14:46,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138893775] [2021-05-06 00:14:46,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-06 00:14:46,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:46,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-06 00:14:46,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 00:14:46,232 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:15:01,115 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-06 00:15:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-06 00:15:01,115 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-06 00:15:01,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:15:01,116 INFO L225 Difference]: With dead ends: 92 [2021-05-06 00:15:01,116 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 00:15:01,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2768.9ms TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 00:15:01,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 00:15:01,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 00:15:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-06 00:15:01,120 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2021-05-06 00:15:01,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:15:01,120 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-06 00:15:01,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-06 00:15:01,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 00:15:01,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:15:01,121 INFO L523 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:15:01,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-05-06 00:15:01,321 INFO L428 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:15:01,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:15:01,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1535376149, now seen corresponding path program 77 times [2021-05-06 00:15:01,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:15:01,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170325724] [2021-05-06 00:15:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:15:01,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:15:01,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11863955] [2021-05-06 00:15:01,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:01,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-05-06 00:15:01,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:15:01,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 316 conjunts are in the unsatisfiable core [2021-05-06 00:15:01,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:15:04,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:04,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:04,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:04,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:15:04,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:15:04,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170325724] [2021-05-06 00:15:04,737 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:15:04,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11863955] [2021-05-06 00:15:04,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11863955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:15:04,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:15:04,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2021-05-06 00:15:04,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038599688] [2021-05-06 00:15:04,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-06 00:15:04,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:15:04,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-06 00:15:04,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 00:15:04,738 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:15:25,123 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2021-05-06 00:15:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-06 00:15:25,124 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-06 00:15:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:15:25,124 INFO L225 Difference]: With dead ends: 93 [2021-05-06 00:15:25,124 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 00:15:25,125 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3152.2ms TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 00:15:25,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 00:15:25,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-05-06 00:15:25,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2021-05-06 00:15:25,129 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2021-05-06 00:15:25,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:15:25,130 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2021-05-06 00:15:25,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:25,130 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2021-05-06 00:15:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 00:15:25,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:15:25,130 INFO L523 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:15:25,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:25,345 INFO L428 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:15:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:15:25,345 INFO L82 PathProgramCache]: Analyzing trace with hash -352082831, now seen corresponding path program 78 times [2021-05-06 00:15:25,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:15:25,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618541683] [2021-05-06 00:15:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:15:25,351 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:15:25,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954161273] [2021-05-06 00:15:25,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:25,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2021-05-06 00:15:25,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:15:25,506 WARN L261 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 320 conjunts are in the unsatisfiable core [2021-05-06 00:15:25,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:15:28,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:28,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:28,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:28,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:15:28,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:15:28,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618541683] [2021-05-06 00:15:28,699 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:15:28,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954161273] [2021-05-06 00:15:28,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954161273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:15:28,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:15:28,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2021-05-06 00:15:28,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998001318] [2021-05-06 00:15:28,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-06 00:15:28,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:15:28,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-06 00:15:28,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 00:15:28,700 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:50,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:15:50,200 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-06 00:15:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-06 00:15:50,200 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-05-06 00:15:50,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:15:50,201 INFO L225 Difference]: With dead ends: 94 [2021-05-06 00:15:50,201 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 00:15:50,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3095.3ms TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 00:15:50,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 00:15:50,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-05-06 00:15:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-06 00:15:50,205 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2021-05-06 00:15:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:15:50,205 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-06 00:15:50,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-06 00:15:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 00:15:50,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:15:50,206 INFO L523 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:15:50,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:50,423 INFO L428 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:15:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:15:50,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1970271659, now seen corresponding path program 79 times [2021-05-06 00:15:50,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:15:50,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254378296] [2021-05-06 00:15:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:15:50,430 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:15:50,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716686637] [2021-05-06 00:15:50,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:15:50,530 WARN L261 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 324 conjunts are in the unsatisfiable core [2021-05-06 00:15:50,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:15:53,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:53,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:53,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:53,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:15:53,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:15:53,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254378296] [2021-05-06 00:15:53,666 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:15:53,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716686637] [2021-05-06 00:15:53,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716686637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:15:53,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:15:53,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2021-05-06 00:15:53,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88352261] [2021-05-06 00:15:53,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-06 00:15:53,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:15:53,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-06 00:15:53,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 00:15:53,667 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:13,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:16:13,548 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-05-06 00:16:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-06 00:16:13,548 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-06 00:16:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:16:13,548 INFO L225 Difference]: With dead ends: 95 [2021-05-06 00:16:13,548 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 00:16:13,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3031.4ms TimeCoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 00:16:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 00:16:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-06 00:16:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2021-05-06 00:16:13,553 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2021-05-06 00:16:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:16:13,553 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2021-05-06 00:16:13,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2021-05-06 00:16:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 00:16:13,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:16:13,554 INFO L523 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:16:13,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-05-06 00:16:13,769 INFO L428 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:16:13,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:16:13,769 INFO L82 PathProgramCache]: Analyzing trace with hash 948816817, now seen corresponding path program 80 times [2021-05-06 00:16:13,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:16:13,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66819128] [2021-05-06 00:16:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:16:13,775 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:16:13,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154613593] [2021-05-06 00:16:13,775 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:16:13,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:16:13,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:16:13,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 328 conjunts are in the unsatisfiable core [2021-05-06 00:16:13,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:16:17,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:17,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:17,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:17,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:16:17,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:16:17,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66819128] [2021-05-06 00:16:17,183 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:16:17,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154613593] [2021-05-06 00:16:17,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154613593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:16:17,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:16:17,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2021-05-06 00:16:17,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48349907] [2021-05-06 00:16:17,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-06 00:16:17,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:16:17,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-06 00:16:17,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 00:16:17,184 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:36,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:16:36,712 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-06 00:16:36,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-06 00:16:36,712 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-06 00:16:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:16:36,713 INFO L225 Difference]: With dead ends: 96 [2021-05-06 00:16:36,713 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 00:16:36,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3176.7ms TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 00:16:36,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 00:16:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 00:16:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:36,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-06 00:16:36,718 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2021-05-06 00:16:36,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:16:36,718 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-06 00:16:36,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-06 00:16:36,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 00:16:36,718 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:16:36,718 INFO L523 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:16:36,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:16:36,926 INFO L428 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:16:36,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:16:36,926 INFO L82 PathProgramCache]: Analyzing trace with hash -651512213, now seen corresponding path program 81 times [2021-05-06 00:16:36,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:16:36,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318422824] [2021-05-06 00:16:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:16:36,933 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:16:36,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86405434] [2021-05-06 00:16:36,933 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:16:37,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-05-06 00:16:37,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:16:37,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 332 conjunts are in the unsatisfiable core [2021-05-06 00:16:37,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:16:40,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:40,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:40,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:40,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:16:40,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:16:40,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318422824] [2021-05-06 00:16:40,963 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:16:40,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86405434] [2021-05-06 00:16:40,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86405434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:16:40,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:16:40,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2021-05-06 00:16:40,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199816973] [2021-05-06 00:16:40,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-06 00:16:40,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:16:40,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-06 00:16:40,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 00:16:40,964 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:11,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:17:11,687 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2021-05-06 00:17:11,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-06 00:17:11,687 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-06 00:17:11,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:17:11,688 INFO L225 Difference]: With dead ends: 97 [2021-05-06 00:17:11,688 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 00:17:11,688 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3685.8ms TimeCoverageRelationStatistics Valid=171, Invalid=7139, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 00:17:11,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 00:17:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-06 00:17:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2021-05-06 00:17:11,692 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2021-05-06 00:17:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:17:11,692 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2021-05-06 00:17:11,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2021-05-06 00:17:11,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 00:17:11,693 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:17:11,693 INFO L523 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:17:11,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:17:11,893 INFO L428 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:17:11,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:17:11,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1277895409, now seen corresponding path program 82 times [2021-05-06 00:17:11,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:17:11,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279645709] [2021-05-06 00:17:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:17:11,900 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:17:11,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119295716] [2021-05-06 00:17:11,900 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:17:12,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:17:12,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:17:12,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 336 conjunts are in the unsatisfiable core [2021-05-06 00:17:12,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:17:15,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:15,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:15,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:15,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:17:15,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:17:15,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279645709] [2021-05-06 00:17:15,402 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:17:15,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119295716] [2021-05-06 00:17:15,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119295716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:17:15,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:17:15,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2021-05-06 00:17:15,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67233576] [2021-05-06 00:17:15,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-06 00:17:15,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:17:15,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-06 00:17:15,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 00:17:15,403 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:44,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:17:44,346 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-06 00:17:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-06 00:17:44,346 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-06 00:17:44,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:17:44,347 INFO L225 Difference]: With dead ends: 98 [2021-05-06 00:17:44,347 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 00:17:44,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3294.6ms TimeCoverageRelationStatistics Valid=173, Invalid=7309, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 00:17:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 00:17:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-06 00:17:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:44,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-06 00:17:44,352 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2021-05-06 00:17:44,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:17:44,352 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-06 00:17:44,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:44,352 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-06 00:17:44,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 00:17:44,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:17:44,352 INFO L523 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:17:44,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-05-06 00:17:44,569 INFO L428 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:17:44,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:17:44,569 INFO L82 PathProgramCache]: Analyzing trace with hash 959989547, now seen corresponding path program 83 times [2021-05-06 00:17:44,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:17:44,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666094704] [2021-05-06 00:17:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:17:44,575 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:17:44,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847879728] [2021-05-06 00:17:44,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:17:44,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-05-06 00:17:44,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:17:44,701 WARN L261 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 340 conjunts are in the unsatisfiable core [2021-05-06 00:17:44,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:17:47,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:47,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:47,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:47,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:17:47,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:17:47,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666094704] [2021-05-06 00:17:47,983 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:17:47,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847879728] [2021-05-06 00:17:47,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847879728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:17:47,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:17:47,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2021-05-06 00:17:47,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26103552] [2021-05-06 00:17:47,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-06 00:17:47,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:17:47,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-06 00:17:47,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 00:17:47,985 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:23,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:18:23,660 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2021-05-06 00:18:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-06 00:18:23,661 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-06 00:18:23,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:18:23,661 INFO L225 Difference]: With dead ends: 99 [2021-05-06 00:18:23,662 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 00:18:23,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3184.7ms TimeCoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 00:18:23,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 00:18:23,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 00:18:23,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:23,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-05-06 00:18:23,669 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2021-05-06 00:18:23,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:18:23,669 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-05-06 00:18:23,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:23,669 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-05-06 00:18:23,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 00:18:23,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:18:23,670 INFO L523 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:18:23,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-05-06 00:18:23,888 INFO L428 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:18:23,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:18:23,888 INFO L82 PathProgramCache]: Analyzing trace with hash -305157583, now seen corresponding path program 84 times [2021-05-06 00:18:23,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:18:23,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109543042] [2021-05-06 00:18:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:18:23,894 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:18:23,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656668989] [2021-05-06 00:18:23,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:18:24,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-06 00:18:24,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:18:24,071 WARN L261 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 344 conjunts are in the unsatisfiable core [2021-05-06 00:18:24,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:18:27,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:27,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:27,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:27,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:18:27,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:18:27,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109543042] [2021-05-06 00:18:27,927 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:18:27,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656668989] [2021-05-06 00:18:27,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656668989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:18:27,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:18:27,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2021-05-06 00:18:27,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898658128] [2021-05-06 00:18:27,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-06 00:18:27,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:18:27,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-06 00:18:27,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 00:18:27,928 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:19:08,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:19:08,319 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-06 00:19:08,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-06 00:19:08,319 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-06 00:19:08,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:19:08,320 INFO L225 Difference]: With dead ends: 100 [2021-05-06 00:19:08,320 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 00:19:08,320 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3737.0ms TimeCoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 00:19:08,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 00:19:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-05-06 00:19:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:19:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-06 00:19:08,325 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2021-05-06 00:19:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:19:08,325 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-06 00:19:08,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:19:08,326 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-06 00:19:08,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 00:19:08,326 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:19:08,326 INFO L523 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:19:08,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:19:08,527 INFO L428 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:19:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:19:08,528 INFO L82 PathProgramCache]: Analyzing trace with hash -870012949, now seen corresponding path program 85 times [2021-05-06 00:19:08,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:19:08,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293681153] [2021-05-06 00:19:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:19:08,534 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:19:08,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843363332] [2021-05-06 00:19:08,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:19:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:19:08,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 348 conjunts are in the unsatisfiable core [2021-05-06 00:19:08,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:19:12,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:19:12,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:19:12,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:19:12,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:19:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:19:12,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:19:12,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293681153] [2021-05-06 00:19:12,423 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:19:12,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843363332] [2021-05-06 00:19:12,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843363332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:19:12,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:19:12,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2021-05-06 00:19:12,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491881827] [2021-05-06 00:19:12,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-06 00:19:12,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:19:12,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-06 00:19:12,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 00:19:12,425 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:19:56,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:19:56,846 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2021-05-06 00:19:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-06 00:19:56,846 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-06 00:19:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:19:56,847 INFO L225 Difference]: With dead ends: 101 [2021-05-06 00:19:56,847 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 00:19:56,847 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3679.6ms TimeCoverageRelationStatistics Valid=179, Invalid=7831, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 00:19:56,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 00:19:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-05-06 00:19:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:19:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2021-05-06 00:19:56,852 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2021-05-06 00:19:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:19:56,852 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2021-05-06 00:19:56,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:19:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2021-05-06 00:19:56,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 00:19:56,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:19:56,852 INFO L523 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:19:57,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-05-06 00:19:57,060 INFO L428 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:19:57,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:19:57,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1200660111, now seen corresponding path program 86 times [2021-05-06 00:19:57,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:19:57,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669866656] [2021-05-06 00:19:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:19:57,069 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:19:57,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081005992] [2021-05-06 00:19:57,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:19:57,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:19:57,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:19:57,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 352 conjunts are in the unsatisfiable core [2021-05-06 00:19:57,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:20:01,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:01,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:01,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:01,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:20:01,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:20:01,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669866656] [2021-05-06 00:20:01,176 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:20:01,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081005992] [2021-05-06 00:20:01,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081005992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:20:01,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:20:01,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2021-05-06 00:20:01,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470812079] [2021-05-06 00:20:01,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-06 00:20:01,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:20:01,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-06 00:20:01,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 00:20:01,177 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:20:50,490 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-06 00:20:50,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-06 00:20:50,490 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-05-06 00:20:50,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:20:50,491 INFO L225 Difference]: With dead ends: 102 [2021-05-06 00:20:50,491 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 00:20:50,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3824.7ms TimeCoverageRelationStatistics Valid=181, Invalid=8009, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 00:20:50,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 00:20:50,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 00:20:50,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-06 00:20:50,496 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2021-05-06 00:20:50,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:20:50,496 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-06 00:20:50,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-06 00:20:50,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 00:20:50,497 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:20:50,497 INFO L523 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:20:50,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-05-06 00:20:50,713 INFO L428 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:20:50,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:20:50,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1434179755, now seen corresponding path program 87 times [2021-05-06 00:20:50,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:20:50,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143700984] [2021-05-06 00:20:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:20:50,719 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:20:50,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535632159] [2021-05-06 00:20:50,720 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:20:50,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2021-05-06 00:20:50,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:20:50,861 WARN L261 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 356 conjunts are in the unsatisfiable core [2021-05-06 00:20:50,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:20:54,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:54,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:54,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:54,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:20:54,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:20:54,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143700984] [2021-05-06 00:20:54,988 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:20:54,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535632159] [2021-05-06 00:20:54,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535632159] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:20:54,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:20:54,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2021-05-06 00:20:54,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367041042] [2021-05-06 00:20:54,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-06 00:20:54,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:20:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-06 00:20:54,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 00:20:54,990 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:21:57,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:21:57,178 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2021-05-06 00:21:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-06 00:21:57,178 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-06 00:21:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:21:57,179 INFO L225 Difference]: With dead ends: 103 [2021-05-06 00:21:57,179 INFO L226 Difference]: Without dead ends: 100 [2021-05-06 00:21:57,179 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4065.3ms TimeCoverageRelationStatistics Valid=183, Invalid=8189, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 00:21:57,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-06 00:21:57,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-05-06 00:21:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:21:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2021-05-06 00:21:57,184 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2021-05-06 00:21:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:21:57,184 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2021-05-06 00:21:57,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:21:57,184 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2021-05-06 00:21:57,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 00:21:57,185 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:21:57,185 INFO L523 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:21:57,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:21:57,385 INFO L428 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:21:57,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:21:57,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1509836977, now seen corresponding path program 88 times [2021-05-06 00:21:57,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:21:57,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835506217] [2021-05-06 00:21:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:21:57,393 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:21:57,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681525028] [2021-05-06 00:21:57,393 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:21:57,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:21:57,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:21:57,709 WARN L261 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 360 conjunts are in the unsatisfiable core [2021-05-06 00:21:57,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:22:01,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:22:01,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:22:01,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:22:01,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:22:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:22:01,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:22:01,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835506217] [2021-05-06 00:22:01,885 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:22:01,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681525028] [2021-05-06 00:22:01,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681525028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:22:01,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:22:01,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2021-05-06 00:22:01,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212648634] [2021-05-06 00:22:01,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-06 00:22:01,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:22:01,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-06 00:22:01,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 00:22:01,886 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:23:06,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:23:06,600 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-06 00:23:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-06 00:23:06,600 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-06 00:23:06,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:23:06,601 INFO L225 Difference]: With dead ends: 104 [2021-05-06 00:23:06,601 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 00:23:06,601 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4054.9ms TimeCoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 00:23:06,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 00:23:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 00:23:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:23:06,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-06 00:23:06,607 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2021-05-06 00:23:06,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:23:06,607 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-06 00:23:06,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:23:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-06 00:23:06,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 00:23:06,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:23:06,608 INFO L523 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:23:06,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:23:06,808 INFO L428 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:23:06,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:23:06,809 INFO L82 PathProgramCache]: Analyzing trace with hash -439756437, now seen corresponding path program 89 times [2021-05-06 00:23:06,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:23:06,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387886931] [2021-05-06 00:23:06,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:23:06,815 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:23:06,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963248072] [2021-05-06 00:23:06,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:23:06,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-05-06 00:23:06,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:23:07,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 364 conjunts are in the unsatisfiable core [2021-05-06 00:23:07,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:23:10,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:23:10,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:23:10,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:23:10,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:23:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:23:10,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:23:10,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387886931] [2021-05-06 00:23:10,953 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:23:10,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963248072] [2021-05-06 00:23:10,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963248072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:23:10,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:23:10,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2021-05-06 00:23:10,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634572963] [2021-05-06 00:23:10,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-06 00:23:10,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:23:10,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-06 00:23:10,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 00:23:10,954 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:24:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:24:06,132 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2021-05-06 00:24:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-06 00:24:06,133 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-06 00:24:06,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:24:06,133 INFO L225 Difference]: With dead ends: 105 [2021-05-06 00:24:06,133 INFO L226 Difference]: Without dead ends: 102 [2021-05-06 00:24:06,133 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3842.9ms TimeCoverageRelationStatistics Valid=187, Invalid=8555, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 00:24:06,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-06 00:24:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-05-06 00:24:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:24:06,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2021-05-06 00:24:06,138 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2021-05-06 00:24:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:24:06,139 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2021-05-06 00:24:06,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:24:06,139 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2021-05-06 00:24:06,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 00:24:06,139 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:24:06,139 INFO L523 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:24:06,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-05-06 00:24:06,340 INFO L428 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:24:06,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:24:06,340 INFO L82 PathProgramCache]: Analyzing trace with hash -747610127, now seen corresponding path program 90 times [2021-05-06 00:24:06,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:24:06,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664182381] [2021-05-06 00:24:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:24:06,346 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:24:06,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295697946] [2021-05-06 00:24:06,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:24:06,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2021-05-06 00:24:06,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:24:06,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 368 conjunts are in the unsatisfiable core [2021-05-06 00:24:06,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:24:11,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:24:11,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:24:11,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:24:11,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:24:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:24:11,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:24:11,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664182381] [2021-05-06 00:24:11,324 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:24:11,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295697946] [2021-05-06 00:24:11,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295697946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:24:11,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:24:11,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2021-05-06 00:24:11,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290346971] [2021-05-06 00:24:11,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-06 00:24:11,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:24:11,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-06 00:24:11,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 00:24:11,326 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)